MySQL JDBC ClassNotFoundException
Hi,
I am a second year student new to java. I am running a stand alone app using Java 5 and mysql 5 on windows xp and I am getting a CNF Exception when I try to execute the following code:
import java.sql.*;
public class JdbcTest {
public static void main(String args[]){
System.out.println("testing mysql jdbc");
try {
Statement stmt;
Class.forName("com.mysql.jdbc.Driver").newInstance();
String url = "jdbc:mysql://localhost:3306/mysql";
Connection con = DriverManager.getConnection(url,"root", "gomeNTil");
System.out.println("URL: " + url);
System.out.println("Connection: " + con);
stmt = con.createStatement();
stmt.executeUpdate("CREATE DATABASE myTest");
con.close();
//}catch(ClassNotFoundException a){
// System.out.println(a.getMessage());
}catch( Exception e ) {
e.printStackTrace();
}//end catch
}//end main
}//end class
I know that this is normally a classpath problem but I have set the path propely, but here it is (I included the hard line breaks for readability):
.;C:\Program Files\Java\jre1.5.0_09\lib\ext\QTJava.zip;
C:\Program Files\Java\jdk1.5.0_09\bin\javac.exe;
C:\Program Files\Java\jar\mysql-connector-java-5.0.4-bin.jar
I have been searching the forum and the net for several hours now and can't find any solution other than check my classpath.
This is the stackTrace. I hope someone can get more out of it than I can.
testing mysql jdbc
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at JdbcTest.main(JdbcTest.java:9)
Thanks in advance.
1. Please use code tags when posting
2. I don't think it will solve your problem but you don need to call the new instance method on the end of this.
Class.forName("com.mysql.jdbc.Driver").newInstance();
3. Make sure you have the name of the class correct and that the driver is in the class path correctly.
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compile and build:Successful
but when I run it...I got this msg:
init:
deps-jar:
Compiling 1 source file to C:\Documents and Settings\Administrator\Form\build\classes
compile:
run:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at my.form.MyDBConnection.init(MyDBConnection.java:26)
at my.form.FormUI.<init>(FormUI.java:20)
at my.form.FormUI$40.run(FormUI.java:1094)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
Java Result: 1
BUILD SUCCESSFUL (total time: 2 seconds)
I use two classes
FormUI.java and MyDBConnection.java
* MyDBConnection.java
package my.form;
import java.sql.*;
public class MyDBConnection {
private Connection myConnection;
/** Creates a new instance of MyDBConnection */
public MyDBConnection() {
public void init(){
Connection connection = null;
Statement statement = null;
try{
Class.forName("com.mysql.jdbc.Driver");
myConnection=DriverManager.getConnection(
"jdbc:mysql://localhost:3306/test,'root' "
catch(SQLException sqlException){
sqlException.printStackTrace();
System.exit(1);
catch ( ClassNotFoundException classNotFound )
classNotFound.printStackTrace();
System.exit(1);
finally
try
statement.close();
connection.close();
catch ( Exception exception )
exception.printStackTrace();
System.exit( 1 );
public Connection getMyConnection(){
return myConnection;
public void close(ResultSet rs){
if(rs !=null){
try{
rs.close();
catch(Exception e){}
public void close(java.sql.Statement stmt){
if(stmt !=null){
try{
stmt.close();
catch(Exception e){}
public void destroy(){
if(myConnection !=null){
try{
myConnection.close();
catch(Exception e){}
* FormUI.java
* Created on May 2, 2007, 10:33 AM
package my.form;
import java.sql.*;
* @author Administrator
public class FormUI extends javax.swing.JFrame {
/** Creates new form FormUI */
public FormUI() throws Exception {
mdbc=new MyDBConnection();
mdbc.init();
Connection conn=mdbc.getMyConnection();
stmt=conn.createStatement();
initComponents();
* MyDBConnection.java
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
jLabel4 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jTextField2 = new javax.swing.JTextField();
jTextField3 = new javax.swing.JTextField();
jTextField35 = new javax.swing.JTextField();
jPanel3 = new javax.swing.JPanel();
jLabel5 = new javax.swing.JLabel();
jTextField5 = new javax.swing.JTextField();
jLabel6 = new javax.swing.JLabel();
jTextField6 = new javax.swing.JTextField();
jLabel7 = new javax.swing.JLabel();
jTextField7 = new javax.swing.JTextField();
jLabel8 = new javax.swing.JLabel();
jTextField4 = new javax.swing.JTextField();
jLabel9 = new javax.swing.JLabel();
jTextField8 = new javax.swing.JTextField();
jLabel10 = new javax.swing.JLabel();
jTextField9 = new javax.swing.JTextField();
jLabel11 = new javax.swing.JLabel();
jTextField10 = new javax.swing.JTextField();
jLabel12 = new javax.swing.JLabel();
jTextField11 = new javax.swing.JTextField();
jLabel13 = new javax.swing.JLabel();
jTextField12 = new javax.swing.JTextField();
jLabel14 = new javax.swing.JLabel();
jTextField13 = new javax.swing.JTextField();
jLabel15 = new javax.swing.JLabel();
jPanel2 = new javax.swing.JPanel();
jLabel16 = new javax.swing.JLabel();
jTextField14 = new javax.swing.JTextField();
jLabel17 = new javax.swing.JLabel();
jTextField15 = new javax.swing.JTextField();
jLabel18 = new javax.swing.JLabel();
jTextField16 = new javax.swing.JTextField();
jLabel19 = new javax.swing.JLabel();
jTextField17 = new javax.swing.JTextField();
jLabel20 = new javax.swing.JLabel();
jTextField18 = new javax.swing.JTextField();
jLabel21 = new javax.swing.JLabel();
jTextField19 = new javax.swing.JTextField();
jLabel22 = new javax.swing.JLabel();
jTextField20 = new javax.swing.JTextField();
jLabel23 = new javax.swing.JLabel();
jTextField21 = new javax.swing.JTextField();
jLabel24 = new javax.swing.JLabel();
jTextField22 = new javax.swing.JTextField();
jLabel25 = new javax.swing.JLabel();
jTextField23 = new javax.swing.JTextField();
jLabel26 = new javax.swing.JLabel();
jTextField24 = new javax.swing.JTextField();
jLabel27 = new javax.swing.JLabel();
jTextField25 = new javax.swing.JTextField();
jLabel28 = new javax.swing.JLabel();
jTextField26 = new javax.swing.JTextField();
jLabel29 = new javax.swing.JLabel();
jTextField27 = new javax.swing.JTextField();
jLabel30 = new javax.swing.JLabel();
jTextField28 = new javax.swing.JTextField();
jLabel31 = new javax.swing.JLabel();
jTextField29 = new javax.swing.JTextField();
jLabel32 = new javax.swing.JLabel();
jTextField30 = new javax.swing.JTextField();
jLabel33 = new javax.swing.JLabel();
jTextField31 = new javax.swing.JTextField();
jLabel34 = new javax.swing.JLabel();
jTextField32 = new javax.swing.JTextField();
jLabel35 = new javax.swing.JLabel();
jTextField33 = new javax.swing.JTextField();
jLabel36 = new javax.swing.JLabel();
jTextField34 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jLabel37 = new javax.swing.JLabel();
jLabel38 = new javax.swing.JLabel();
jTextField37 = new javax.swing.JTextField();
jTextField36 = new javax.swing.JTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jPanel1.setBackground(new java.awt.Color(204, 255, 204));
jLabel1.setText("custID");
jLabel2.setText("PIN");
jLabel3.setText("Source");
jLabel4.setText("SaleDate");
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
jTextField2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField2ActionPerformed(evt);
jTextField3.setText("SourceHub");
jTextField3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField3ActionPerformed(evt);
jTextField35.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField35ActionPerformed(evt);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(28, 28, 28)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel1)
.addComponent(jLabel2))
.addGap(15, 15, 15)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField2, javax.swing.GroupLayout.DEFAULT_SIZE, 113, Short.MAX_VALUE)
.addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 113, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 88, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel3)
.addComponent(jLabel4))
.addGap(13, 13, 13)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField35)
.addComponent(jTextField3, javax.swing.GroupLayout.DEFAULT_SIZE, 83, Short.MAX_VALUE))
.addGap(198, 198, 198))
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(21, 21, 21)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel1)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel3))
.addGap(18, 18, 18)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel4)
.addComponent(jTextField35, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(23, Short.MAX_VALUE))
jPanel3.setBackground(new java.awt.Color(204, 255, 204));
jLabel5.setText("First Name");
jTextField5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField5ActionPerformed(evt);
jLabel6.setText("Last Name");
jTextField6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField6ActionPerformed(evt);
jLabel7.setText("Address");
jTextField7.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField7ActionPerformed(evt);
jLabel8.setText("City");
jTextField4.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField4ActionPerformed(evt);
jLabel9.setText("ZIP");
jTextField8.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField8ActionPerformed(evt);
jLabel10.setText("Sales Rep");
jTextField9.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField9ActionPerformed(evt);
jLabel11.setText("Phone");
jTextField10.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField10ActionPerformed(evt);
jLabel12.setText("Alt Phone");
jTextField11.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField11ActionPerformed(evt);
jLabel13.setText("E-Mail");
jTextField12.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField12ActionPerformed(evt);
jLabel14.setText("DateofBirth");
jTextField13.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField13ActionPerformed(evt);
jPanel2.setBackground(new java.awt.Color(204, 255, 204));
jLabel16.setText("AnnualAmount");
jTextField14.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField14ActionPerformed(evt);
jLabel17.setText("AnnualDay");
jTextField15.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField15ActionPerformed(evt);
jLabel18.setText("AnnualMonth");
jTextField16.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField16ActionPerformed(evt);
jLabel19.setText("MonthlyAmount");
jTextField17.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField17ActionPerformed(evt);
jLabel20.setText("MonthlyDay");
jTextField18.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField18ActionPerformed(evt);
jLabel21.setText("MonthlyStatusDate");
jTextField19.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField19ActionPerformed(evt);
jLabel22.setText("AnnualStatus2");
jTextField20.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField20ActionPerformed(evt);
jLabel23.setText("MonthlyStatus2");
jTextField21.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField21ActionPerformed(evt);
jLabel24.setText("Plan");
jTextField22.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField22ActionPerformed(evt);
jLabel25.setText("Bonus Gift");
jTextField23.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField23ActionPerformed(evt);
jLabel26.setText("AccountType");
jTextField24.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField24ActionPerformed(evt);
jLabel27.setText("AbaNumber");
jTextField25.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField25ActionPerformed(evt);
jLabel28.setText("AccountNumber");
jTextField26.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField26ActionPerformed(evt);
jLabel29.setText("BankName");
jTextField27.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField27ActionPerformed(evt);
jLabel30.setText("Verification Number");
jTextField28.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField28ActionPerformed(evt);
jLabel31.setText("Upsale1");
jTextField29.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField29ActionPerformed(evt);
jLabel32.setText("Upsale2");
jTextField30.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField30ActionPerformed(evt);
jLabel33.setText("UP1BillDate");
jTextField31.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField31ActionPerformed(evt);
jLabel34.setText("UP2BillDate");
jTextField32.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField32ActionPerformed(evt);
jLabel35.setText("Date-Time");
jTextField33.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField33ActionPerformed(evt);
jLabel36.setText("Notes");
jTextField34.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField34ActionPerformed(evt);
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel16)
.addComponent(jLabel19)
.addComponent(jLabel22)))
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(34, 34, 34)
.addComponent(jLabel24))
.addGroup(jPanel2Layout.createSequentialGroup()
.addContainerGap()
.addComponent(jLabel26))
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(23, 23, 23)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel29)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(2, 2, 2)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel31)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel35)
.addComponent(jLabel33)))))))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField24)
.addComponent(jTextField22)
.addComponent(jTextField20)
.addComponent(jTextField17)
.addComponent(jTextField14, javax.swing.GroupLayout.DEFAULT_SIZE, 71, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel17)
.addComponent(jLabel20))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField18)
.addComponent(jTextField15, javax.swing.GroupLayout.DEFAULT_SIZE, 73, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(jLabel18)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField16, javax.swing.GroupLayout.PREFERRED_SIZE, 85, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(jLabel21)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField19, javax.swing.GroupLayout.PREFERRED_SIZE, 80, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel27)
.addComponent(jLabel25)
.addComponent(jLabel23))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jTextField25)
.addComponent(jTextField23)
.addComponent(jTextField21, javax.swing.GroupLayout.DEFAULT_SIZE, 72, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField28, javax.swing.GroupLayout.PREFERRED_SIZE, 94, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(jLabel28)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField26))))))
.addGroup(jPanel2Layout.createSequentialGroup()
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(jTextField31, javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField29, javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jTextField27, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 105, Short.MAX_VALUE))
.addGap(21, 21, 21)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel30)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel2Layout.createSequentialGroup()
.addComponent(jLabel34)
.addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel2Layout.createSequentialGroup()
.addGap(14, 14, 14)
.addComponent(jTextField34, javax.swing.GroupLayout.DEFAULT_SIZE, 195, Short.MAX_VALUE))
.addGroup(jPanel2Layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField32, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE))))
.addGroup(javax.swing.GroupLayout.Alignment.LEADING, jPanel2Layout.createSequentialGroup()
.addComponent(jLabel32)
.addGap(20, 20, 20)
.addComponent(jTextField30, javax.swing.GroupLayout.PREFERRED_SIZE, 95, javax.swing.GroupLayout.PREFERRED_SIZE)))))
.addGroup(jPanel2Layout.createSequentialGroup()
.addComponent(jTextField33, javax.swing.GroupLayout.PREFERRED_SIZE, 123, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(27, 27, 27)
.addComponent(jLabel36)))
.addGap(113, 11I am not sure what is the driver for mysql. I just came across the similar kind of problem in the forum and I have given the forum link below. Check if you have the file and then set the classpath.
[Hyperlinks] http://forum.java.sun.com/thread.jspa?threadID=522873&messageID=2503366
[HyperLinks] -
Connection mysql jdbc error ?
I have program java likes this :
import java.sql.*;
public class LoadDriver {
// Define the JDBC Driver and the database connection URL
public static final String DRIVER = "com.mysql.jdbc.Driver";
public static final String URL = "jdbc:mysql://localhost/java?user=test&password=test";
public static void main(String args[]) {
Connection conn = null;
Statement select = null;
ResultSet result = null;
try {
// load the driver dynamically
Class.forName(DRIVER);
// connect to the database
conn = DriverManager.getConnection(URL);
// perform a query. first create a Statement object from the connection
select = conn.createStatement();
// next execute a query (SQL string) and return the results in a ResultSet object
result = select.executeQuery("select fname, lname from names order by lname, fname");
// print out the results
while(result.next()) {
String fname = result.getString("fname"); // note these match the columns in the
String lname = result.getString("lname"); // SELECT statement (fname, lname)
System.out.println(fname+" "+lname);
// check if there was a problem executing the SQL statement
catch (SQLException e) {
System.err.println("SQL Exception: "+e.getMessage());
System.exit(1);
// if the JDBC driver is not in the CLASSPATH
catch (ClassNotFoundException e) {
System.err.println("Class not found: "+e.getMessage());
System.exit(1);
// catch any other exceptions
catch (Exception e) {
System.err.println("Other Exception: ");
System.err.println(e.getMessage());
System.exit(1);
// You want to close the connections no matter what happens!
finally {
try {
// close the result, query, and database connection
if (result != null) result.close();
if (select != null) select.close();
if (conn != null) conn.close();
catch (SQLException e) {
// one of the new cases where it's OK to just eat exceptions or at the most log them
System.err.println("Error closing connection: "+e.getMessage());
but i get errror likes this :
D:\Program Files\Java\jdk1.5.0_03\bin>javac LoadDriver.java
D:\Program Files\Java\jdk1.5.0_03\bin>java LoadDriver
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Sign
ature
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at LoadDriver.main(LoadDriver.java:20)
D:\Program Files\Java\jdk1.5.0_03\bin>
I place mysql.jar in
- D:\Program Files\Java\jdk1.5.0_03\jre\lib\ext
- D:\Program Files\Java\jdk1.5.0_03\lib
- D:\Program Files\Java\jdk1.5.0_03\jre\lib
and i make classpath to D:\Program Files\Java\jdk1.5.0_03\bin;D:\Program Files\Java\jdk1.5.0_03\jre\lib\ext\
but it still doesn't work
What must I do ?
Thx 4 your replyHello!
I'm getting this same error message and i followed the code example as close as i could:
Thanks for any help on this!
bk
set oldpath=%PATH%
set JAVA_HOME=C:\jdk1.5.0_02
set ANT_HOME=C:\ANT\apache-ant-1.6.5
set PATH=C:\jdk1.5.0_02\bin;%ANT_HOME%\bin
set CLASSPATH=.;C:\jdk1.5.0_02\lib;C:\MYSQL\mysql-connector-java-3.1.10\src\com\;C:\MYSQL\mysql-connector-java-3.1.10\src\org\;C:\MYSQL\mysql-connector-java-3.1.10\mysql-connector-java-3.1.10-bin-g.jar;
http://www.developer.com/java/data/article.php/3417381#Critical_steps_in_using_JDBC
import java.sql.*;
public class Jdbc11 {
public static void main(String args[]){
System.out.println(
"Copyright 2004, R.G.Baldwin");
try {
Statement stmt;
//Register the JDBC driver for MySQL.
Class.forName("com.mysql.jdbc.Driver");
//Define URL of database server for
// database named mysql on the localhost
// with the default port number 3306.
String url =
"jdbc:mysql://localhost:3306/mysql";
//Get a connection to the database for a
// user named root with a blank password.
// This user is the default administrator
// having full privileges to do anything.
Connection con =
DriverManager.getConnection(
url,"root", "");
//Display URL and connection information
System.out.println("URL: " + url);
System.out.println("Connection: " + con);
//Get a Statement object
stmt = con.createStatement();
//Create the new database
stmt.executeUpdate(
"CREATE DATABASE JunkDB");
//Register a new user named auser on the
// database named JunkDB with a password
// drowssap enabling several different
// privileges.
stmt.executeUpdate(
"GRANT SELECT,INSERT,UPDATE,DELETE," +
"CREATE,DROP " +
"ON JunkDB.* TO 'auser'@'localhost' " +
"IDENTIFIED BY 'drowssap';");
con.close();
}catch( Exception e ) {
e.printStackTrace();
}//end catch
}//end main
}//end class Jdbc11
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Signature -
Mysql, JDBC, Linux and Access Denied
I have just installed a MySQL Connctor/J 2.0.14 (JDBC) to be able to connect to a MYSQL-database on a Linux-server from a java-program on the same server. But I keep on getting an access-right-error. I would be very thankfull if someone could help me.
From the linux-shell I can connect to the database with mysql:
[root@dat test]# mysql -u speciale -p specialetestDB
But when I try to connect from the Java-program I recieve the following error:
[root@dat test]# java TestDB
SQL-fejl: Invalid authorization specification: Access denied for user: 'speciale@dat' (Using password: YES)
The program Is very simple:
import java.sql.*;
public class TestDB {
public static void main(String[] args) {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection connection = DriverManager.getConnection(
"jdbc:mysql://localhost/specialetestDB?user=speciale&password=x");
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery(
"Select Vnavn from VidensElement");
while (resultSet.next())
System.out.println(resultSet.getString("Vnavn"));
statement.close();
connection.close();
catch (SQLException sqlException) {
System.out.println("SQL-fejl: " + sqlException.getMessage());
catch (ClassNotFoundException classNotFoundException) {
System.out.println("Driver ikke fundet: " +
classNotFoundException.getMessage());
catch (Exception instantiationException) {
System.out.println("Driver kan ikke instantieres: " +
instantiationException.getMessage());
Sannethe password you have listed as what you use fromthe
shell vs. what you have in yoour code are not the
same. they need to be the same.
other than that make sure you user account in mysqlis
set up to accept connections from wherever you needit
to. Thanks,
The passwords are the same - I just didn't show it in
the copied text. Actually the shell-dialog is:
From the linux-shell I can connect to the database
with mysql:
[root@dat test]# mysql -u speciale -p specialetestDB
password: x
sorry my fault, but it probably was worth checking
But what you said about my user accounts might be the
problem In the mysql.user tabel I have 3 instances of
the "speciale" user, each with a different host: "%",
"dat" and "localhost".
Is that what you ment?
yes. it is possible that the passwords are not the same. so the password for speciale from localhost is not the same as from % or dat. why don't you delete the dat and localhost ones and just leave the % one. -
Mysql-jdbc applet connection issue
I am developing a user interface for a mysql database. I am able to successfully access the db and execute queries through a java APPLICATION.
I need to do the same (access the db (mysql)) through a java APPLET. When I compile the applet it complies fine. When I try to run the applet I'm getting the following error message:
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
I tied running the applet using appletviewer and through a web browser, same result. I can run the application from the same command prompt it works fine.
Please help.
Relevant info:
OS: Linux, Fedora4
Classpath: export set CLASSPATH=/home/xyz/Java/mysql-connector-java-5.0.5/:$CLASSPATH;
JDK: PATH=/usr/java/jdk1.6.0/bin
Program:
import java.sql.*;
public class b extends java.applet.Applet
int y = 0;
public void paint(java.awt.Graphics g)
y = y + 10;
Connection conn = null;
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/testdb?user=usr1234&password=xyzxyz";
try {
Class.forName(driver).newInstance();
conn = DriverManager.getConnection(url);
System.out.println("Connected to the database.");
System.out.println(" ");
//*********BLOCK TO RETRIEVE RECORDS FROM TABLE*********
try{
Statement st = conn.createStatement();
ResultSet res = st.executeQuery("SELECT * FROM table1");
System.out.println("Name: " + "\t" + "Age: ");
while (res.next()) {
String s = res.getString("name");
int i = res.getInt("age");
System.out.println(s + "\t" + i);
catch (SQLException s){
y = y + 20;
g.drawString("******* s: "+s,50,y);
//*********END OF BLOCK TO RETRIEVE RECORDS FROM TABLE*********
conn.close();
System.out.println("Disconnected from database");
} catch (Exception e) {
y = y + 20;
g.drawString("******* e: "+e,50,y);
e.printStackTrace();
Thanks for the help in advance.
--MatFirst, accessing a database from an applet is a horrendous idea.
Having said that, did you add the mysql jar to the applet tag in the html page (in the archive property)? -
<%@ page import = "java.io.*, java.util.*,java.net.URL,java.awt.*,java.lang.*,java.sql.*" %>
<HTML>
<head></head>
<body>
<%
ResultSet rs;
Statement stmt;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/petrofed?user=petrofed&password=petro");
String sql = "SELECT * FROM sample";
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
while (rs.next())
out.println(rs.getString(1));
out.println(rs.getString(2));
// Do something with the Connection
} catch (SQLException ex) {
// handle any errors
out.println("SQLException: " + ex.getMessage());
out.println("SQLState: " + ex.getSQLState());
out.println("VendorError: " + ex.getErrorCode());
catch (ClassNotFoundException cnfex)
out.println("SQLException: " + cnfex.getMessage());
%>
</body>
</html>
Getting following error after uploading it on the Server
SQLException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.security.AccessControlException MESSAGE: access denied (java.net.SocketPermission localhost resolve) STACKTRACE: java.security.AccessControlException: access denied (java.net.SocketPermission localhost resolve) at java.security.AccessControlContext.checkPermission(AccessControlContext.java:269) at java.security.AccessController.checkPermission(AccessController.java:401) at java.lang.SecurityManager.checkPermission(SecurityManager.java:524) at java.lang.SecurityManager.checkConnect(SecurityManager.java:1023) at java.net.InetAddress.getAllByName0(InetAddress.java:1000) at java.net.InetAddress.getAllByName0(InetAddress.java:981) at java.net.InetAddress.getAllByName(InetAddress.java:975) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:133) at com.mysql.jdbc.MysqlIO.(MysqlIO.java:281) at com.mysql.jdbc.Connection.createNewIO(Connection.java:1696) at com.mysql.jdbc.Connection.(Connection.java:408) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:270) at java.sql.DriverManager.getConnection(DriverManager.java:512) at java.sql.DriverManager.getConnection(DriverManager.java:193) at org.apache.jsp.mysqldb2_jsp._jspService(mysqldb2_jsp.java:59) at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java) at org.apache.jasper.servlet.JspServletWrapper.service(Unknown Source) at org.apache.jasper.servlet.JspServlet.serviceJspFile(Unknown Source) at org.apache.jasper.servlet.JspServlet.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.access$0(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContext.invoke(Unknown Source) at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorReportValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619) at java.lang.Thread.run(Thread.java:534) ** END NESTED EXCEPTION ** SQLState: 08S01 VendorError: 0Tomcat is running with a Java security manager that doesn't let your application connect via sockets to applications outside Tomcat. You could perhaps fix this by configuring Tomcat with a security policy that does permit that, but don't ask me how to do that. I would fix the problem by using connection pools that are (I believe) built into Tomcat.
-
Difficulty Installing the MySQL JDBC Driver
I am trying to install mySQL JDBC driver "mysql-connector-java-2.0.14.tar.gz" to link up with the mySQL server on a Windows XP OS.
The error is:
Cannot find database driver classes
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
I have read the USAGE AND INSTALLATION in the README file, but it can not seem to find these drivers still. I added the location to my PATH variable in the environment variables, and set CLASSPATH= ... as well and still can not find them
Paths i added to PATH and CLASSPATH variables
C:\j2sdk1.4.0_01\mysqlconnector.tar
C:\j2sdk1.4.0_01\JDBC
I did both methods it suggested, within the JDBC folder are the com and org folders. Anyone offer some suggestions.
I know some smart person is going to say just use linux, but it is needed for my father and he can barely use MS Windows.
Cheers for any helpDear Java Newsgroup User
I would like to understand more around the Java and MySQLJDBC Configuration. Because I have some problem trying to install and Testing the MySQL JDBC Connector Driver.
I use Windows XP Professional.
I Downloaded and Intalled Sun One Studio to start learning JAVA and Features. This SDK Package make 3 Packages (directories):
Directory No1 C:\JSDK4\j2sdk1.4.1_02 (JAVA_HOME)
Directory No2 C:\JSDK4\s1studio (Source Examples ...)
Directory No3 C:\Archivos de programa\Java\j2re1.4.1_02 (Java R. Env.)
In the WINDOWS XP PANNEL CONTROL apper Java Plugins Control Pannel also
when I press or click this icon apper a Java Screen where i can see the following Configuration in the Advanced Option:
Java RuntTime Enviroment:
Use Java Plugin Default
JRE 1.4.1_02 in C:\Archivos de programa\Java\j2re1.4.1_02
SDK 1.4.1_02 in C:\JSDK4\j2sdk1.4.1_02
MySQL Driver Confiration and Version:
This is my Un-ziped MySQL JDBC connector Path:
C:\JSDK4\j2sdk1.4.1_02\mysql-connector-java-3.0.8-stable
Into mysql-connector-java-3.0.8-stable directory exist an directory called [testsuite] that have some jar, java and class files.
Testing MySQL JDBC Connecto Driver and Error Message:
When i try to run the BaseTestCase.class file the system give me the following ERROR Message:
C:\JSDK4\j2sdk1.4.1_02\mysql-connector-java-3.0.8-stable\testsuite>java BaseTestCase
Exception in thread "main" java.lang.NoClassDefFoundError: BaseTestCase (
ame: testsuite/BaseTestCase)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:502)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.
3)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:250)
at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
My Question are the following:
1- What is the meaning of this message error?
2- What i need to do to solve this problem?
3- What is the function specificly of the JRE 1.4.1_02 in C:\Archivos de programa\Java\j2re1.4.1_02 Directory in My JAVA Instalation.
I you need more detail of my instalation please write me and i write back a soon as possible.
Dear Users:
Please Help Me! to continue with the next steps ...
Best Regards and Than's so much for read this message
From Panama City
VanyRon -
No suitable driver with com.mysql.jdbc.Driver
Ok. here's the issue. I have a windows box. (first problem) but let's pretend that it's ok. :) I installed Tomcat 4.1 installed J2SDK1.4.0
start serving pages GREAT!. I have Mysql working perfectly with PHP on this system. I JUST want to connect with JDBC :)
I've downloaded the MySQL Jdbc Connector/J 3.08 stable installed the .jar file in the $JAVA_HOME/jre/lib/ext as per the README
Now granted I am a little new to JSP. but I have checked over this again and again. used different code. connected as many ways as I can think of and I still get the same result.
Database Error :
No suitable driver
Please Try Some Other Time
So I figure it's a MYSQL issue. no I also went thru and did the Microsot connection to MS SQL 2000 with the same result.
Here's where the drivers are (tried using the other method for installing the MySQL connector as well, and my class path
Y:\j2sdk1.4.0\com\mysql\jdbc\Driver.class
com.mysql.jdbc.Driver.class
Y:\j2sdk1.4.0\org\gjt\mm\mysql\Driver.class
org.gjt.mm.mysql.Driver.class
My classpath is:
.;F:\j2sdk1.4.0\;F:\j2sdk1.4.0\bin\;F:\j2sdk1.4.0\lib\;F:\j2sdk1.4.0\lib\classes\
[ Here's The Enviorment]
Windows 2000 5.00.2195 SP3
MS SQL 2K SP3
Apache Tomcat/4.1.27
j2sdk1.4.0
MySql 3.23.57-nt
mysql Jdbc Connector/J 3.08 stable
<!-- mysql.jsp BEGIN-->
<%@ page import="java.sql.*" %>
<%
Connection conn;
ResultSet results;
try {
String jdbc_driver = "com.mysql.jdbc.Driver";
System.out.println("jdbc_driver = " + jdbc_driver);
Class.forName(jdbc_driver).newInstance();
catch (ClassNotFoundException cnfe)
System.out.println(cnfe.getMessage());
try {
String url = "jdbc:mysql://localhost:3306/javatest?username=root,password=****"; // pass hidden
conn = DriverManager.getConnection(url);
System.out.println("connected to mySql DataBase");
Statement stmt = conn.createStatement();
Statement smt=conn.createStatement();
results=smt.executeQuery("select * from testdata");
while(results.next())
%>
<%= results.getString("foo")%>
<%= results.getString("bar")%>
<%= results.getString("id")%>
<%
results.close();
conn.close();
catch(Exception exp)
%>
<H3>Database Error : </H3><B><%= exp.getMessage() %></B><H3>Please Try Some Other Time</H3>
<%
%>
<!-- mysql.jsp end -->
BTW i aslo tried connecting to MicrosoftSQL 2K
<!-- microsoft.jsp Begin -->
<%@ page import="java.sql.*" %>
<%
Connection conn;
ResultSet results;
try {
String jdbc_driver = "sun.jdbc.odbc.JdbcObdcDriver";
System.out.println("jdbc_driver = " + jdbc_driver);
Class.forName(jdbc_driver).newInstance();
catch (ClassNotFoundException cnfe)
System.out.println(cnfe.getMessage());
try {
String url = "jdbc:odbc:contacts";
String username = "javauser";
String pw = "javauser";
conn = DriverManager.getConnection(url, username, pw);
System.out.println("connected to Msoft DataBase");
Statement stmt = conn.createStatement();
Statement smt=conn.createStatement();
results=smt.executeQuery("select * from contacts");
while(results.next())
%>
<%= results.getString("name")%><br>
<%
results.close();
conn.close();
catch(Exception exp)
%>
<H3>Database Error : </H3><B><%= exp.getMessage() %></B><H3>Please Try Some Other Time</H3>
<%
%>
<!-- microsoft.jsp end -->
got the exact same results.
Just to show you mysql is Good. with localhost.
mysql -u root -h localhost -p
mysql> use javatest
Database changed
mysql> select * from testdata;
| id | foo | bar |
| 1 | hello | 12345 |
1 row in set (0.00 sec)
mysql>Nope, it's not a MySQL issue.
I'd recommend NOT putting the JDBC JAR file (or any others, except Sun-sanctioned extensions) in JAVA_HOME/jre/lib/ext.
JDBC JARs belong in TOMCAT_HOME/common/lib or in the WEB-INF/lib directory for your particular app. If you put them in the former, all apps running under Tomcat can have access to them. If you put them in the latter, only your app can see them.
After you've done that, do some reading about JNDI data sources under Tomcat:
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html
That way you can get that connection code out of your JSPs and into the web.xml and <Context>, where it belongs. You'll be able to change data sources without rewriting your pages.
Good luck - MOD -
MYSQL JDBC NoClassDefFoundError: org/aspectj/lang/Signature
i am trying to connect to a database via java using JDBC i have installed:
jdk1.5.0_01
mysql-connector-java-3.1.8-bin-g.jar
MySQL Server 4.1
Java works fine, MYSQL works fine from the command prompt but when it comes to testing using this simple java program
public class JdbcExample1 {
public static void main(String args[]) {
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
con = DriverManager.getConnection("localhost", "username", "password");
if(!con.isClosed())
System.out.println("Successfully connected to MySQL server...");
} catch(Exception e) {
System.err.println("Exception: " + e.getMessage());
} finally {
try {
if(con != null)
con.close();
} catch(SQLException e) {}
this compiles fine but when run i get the following error message
Exception in thread "main" java.lang.NoClassDefFoundError: org/aspectj/lang/Signature
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at JdbcExample1.main(JdbcExample1.java:10)
class path is set as .;C:\Program Files\Java\jdk1.5.0_01\jre\lib\ext\mysql-connector-java-3.1.8-bin.java
any help or input on this error would be appreciated
thanks in advanced NeilHi, All:
I just read this thread of discussion and got valueable info to solve my problem in a similar fashion. I'd suggest the last poster, Anil, to re-read the whole thread to correct the possible problems stated.
I would just like to add my problem/solution scenario to this thread to share my experience. I assume that readers already went through the previous notes in this thread.
#1. Space in Path:
I installed
MySQL DB server in: "C:\Program Files\MySQL\MySQL Server 4.1"
MySQL JDBC Driver: D:\mysql\mysql-connector-java-3.1.8
It seems to me that the DB server installed directory is not affected by whether there is a space in path name. The JDBC Driver path, on the other hand, does have the side effect of the space in path name when accessing by the Java client.
#2. -g in JDBC Driver:
I have been using the driver mysql-connector-java-3.1.8-bin.jar. However, right before I needed to create my ant build.xml configuration file (more details later), I thought the instruction asked me to use the mysql-connector-java-3.1.8-bin-g.jar (the debug version as kpreiser indicated), and therefore I got the now-well-known "org/aspectj/lang/Signature" error. After I removed that "-g" from the JDBC driver extression in my build.xml file, it then works well. (Great tip, kpreiser.)
#3. Middlegen with Hibernate:
My situation is a bit more complicated, but the issue of "org/aspectj/lang/Signature" error was the same (finally resolved in #2). I was trying to use Middlegen to re-generate my Hibernate map files from the data schema. (Hibernate is an open source tool that lets you create JavaBean source file from a Hibernate map file to map to a database table (see http://www.hibernate.org/ for more details.) Since I re-factored my data schema in the database, I needed to re-generate the Hibernate map files (from data schema) so that I can in turn use the map files to re-generate the JavaBean code. I wanted to use the Middlegen tool (see http://www.hibernate.org/98.html for more details) to re-generate the map files from database schema. However, in order to use Middlegen properly, you need to create the ant build.xml file to do that job. So I had to resort to MiddlegenIDE (see http://ultimania.org/middlegenide/ for more details) to help generate that build.xml file. (This is where I had the -g specified for the JDBC driver in the build.xml file that caused the problem.) Once that build.xml file is generated, the use of ant (a Java make tool) with the build.xml file can generate the hibernate map files. From these map files, JavaBean source files can be generated using Hibernate CodeGenerator.hbm2java tool. (There are several other useful tools in Hibernate too to convert the database ddl schema and the JavaBean source file.)
Obviously, there are other approaches and tools that you can use (XDoclet for instance) for different situations, but I am only providing a high level overview on what you can do to be more productive if you are involved in a large and complicated project with Java/JDBC and ORM (Object/Relational Mapping).
Item #3 may sound complicated at first, but it's worth the time to learn the tools and concept. Once you are familiar with these tools (Eclipse, Hibernate, Middlegen, Ant, etc.), you will become more productive in responding to the dynamic nature of the high-tech world where changing requirements are the only constant. I hope that these separate tools will become more integrated and easier to use in the future, but for now they do the job well.
Thanks for the great tips and hope that this helps too.
- Shuh -
Hi all,
I got this error when I tried to execute a simple JSF app. I am using JDeveloper 10.1.3 release edition. Please advice
[Starting OC4J using the following ports: HTTP=8988, RMI=23891, JMS=9227.]
**** Unable to obtain password from principals.xml. Using default.
C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\config>
C:\JDeveloper10g\jdk\bin\javaw.exe -ojvm -classpath C:\JDeveloper10g\j2ee\home\oc4j.jar;C:\JDeveloper10g\jdev\lib\jdev-oc4j-embedded.jar -Xverify:none -DcheckForUpdates=adminClientOnly -Doracle.application.environment=development -Doracle.j2ee.dont.use.memory.archive=true -Doracle.j2ee.http.socket.timeout=500 -Doc4j.jms.usePersistenceLockFiles=false oracle.oc4j.loader.boot.BootStrap -config C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\config\server.xml
[waiting for the server to complete its initialization...]
2006-01-31 21:40:47.062 NOTIFICATION Auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\dms.war...
2006-01-31 21:40:47.093 NOTIFICATION Unjar C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\dms.war in C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\dms
2006-01-31 21:40:47.093 NOTIFICATION Finished auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\dms.war
2006-01-31 21:40:47.156 NOTIFICATION Auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\connectors\datasources\datasources.rar...
2006-01-31 21:40:47.156 NOTIFICATION Unjar C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\connectors\datasources\datasources.rar in C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\connectors\datasources\datasources
2006-01-31 21:40:47.171 NOTIFICATION Finished auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\connectors\datasources\datasources.rar
2006-01-31 21:40:47.218 NOTIFICATION Auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j.ear...
2006-01-31 21:40:47.281 NOTIFICATION Unjar C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j.ear in C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j
2006-01-31 21:40:47.359 NOTIFICATION Finished auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j.ear
2006-01-31 21:40:47.375 NOTIFICATION Auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j\webapp.war...
2006-01-31 21:40:47.375 NOTIFICATION Unjar C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j\webapp.war in C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j\webapp
2006-01-31 21:40:59.296 NOTIFICATION Finished auto-unpacking C:\JDeveloper10g\jdev\system\oracle.j2ee.10.1.3.36.73\embedded-oc4j\applications\bc4j\webapp.war
2006-01-31 21:41:08.421 WARNING J2EE OJR0107 Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
06/01/31 21:41:08 SEVERE: ApplicationStateRunning.initConnector Error occurred initializing connectors. Exception is: Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
Jan 31, 2006 9:41:08 PM com.evermind.server.ApplicationStateRunning initConnector
SEVERE: Error occurred initializing connectors. Exception is: Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
06/01/31 21:41:08 SEVERE: ApplicationStateRunning.initConnector Stack trace: oracle.oc4j.sql.DataSourceException: Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
at com.evermind.server.ApplicationStateRunning.initDataSourceConnectionPool(ApplicationStateRunning.java:2016)
at com.evermind.server.ApplicationStateRunning.initDataSourceConnector(ApplicationStateRunning.java:1961)
at com.evermind.server.ApplicationStateRunning.initConnector(ApplicationStateRunning.java:1220)
at com.evermind.server.ApplicationStateRunning.initConnectors(ApplicationStateRunning.java:356)
at com.evermind.server.ApplicationStateRunning.initializeApplication(ApplicationStateRunning.java:208)
at com.evermind.server.Application.setConfig(Application.java:391)
at com.evermind.server.Application.setConfig(Application.java:309)
at com.evermind.server.ApplicationServer.addApplication(ApplicationServer.java:1771)
at com.evermind.server.ApplicationServer.initializeDeployedApplications(ApplicationServer.java:1532)
at com.evermind.server.ApplicationServer.setConfig(ApplicationServer.java:939)
at com.evermind.server.ApplicationServerLauncher.run(ApplicationServerLauncher.java:113)
at java.lang.Thread.run(Thread.java:595)
Caused by: javax.resource.ResourceException: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
at oracle.oc4j.sql.spi.ResourceAdapterImpl.createDataSourceConnectionPool(ResourceAdapterImpl.java:106)
at oracle.oc4j.sql.DataSourceUtils.getDataSourceConnectionPool(DataSourceUtils.java:322)
at com.evermind.server.ApplicationStateRunning.initDataSourceConnectionPool(ApplicationStateRunning.java:1997)
... 11 more
Caused by: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
at oracle.oc4j.sql.config.DataSourceConfigUtils.createConnectionFactory(DataSourceConfigUtils.java:247)
at oracle.oc4j.sql.DataSourceConnectionPoolImpl.<init>(DataSourceConnectionPoolImpl.java:107)
at oracle.oc4j.sql.spi.ResourceAdapterImpl.createDataSourceConnectionPool(ResourceAdapterImpl.java:99)
... 13 more
Caused by: oracle.classloader.util.AnnotatedClassNotFoundException:
Missing class: com.mysql.jdbc.Driver
Dependent class: oracle.oc4j.sql.config.DataSourceConfigUtils
Loader: oc4j:10.1.3
Code-Source: /C:/JDeveloper10g/j2ee/home/lib/oc4j-internal.jar
Configuration: <code-source> in META-INF/boot.xml in C:\JDeveloper10g\j2ee\home\oc4j.jar
This load was initiated at current-workspace-app.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.
at oracle.classloader.PolicyClassLoader.handleClassNotFound(PolicyClassLoader.java:2061)
at oracle.classloader.PolicyClassLoader.internalLoadClass(PolicyClassLoader.java:1665)
at oracle.classloader.PolicyClassLoader.loadClass(PolicyClassLoader.java:1621)
at oracle.classloader.PolicyClassLoader.loadClass(PolicyClassLoader.java:1606)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at oracle.oc4j.sql.config.DataSourceConfigUtils.createConnectionFactory(DataSourceConfigUtils.java:244)
... 15 more
Jan 31, 2006 9:41:08 PM com.evermind.server.ApplicationStateRunning initConnector
SEVERE: Stack trace: oracle.oc4j.sql.DataSourceException: Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
at com.evermind.server.ApplicationStateRunning.initDataSourceConnectionPool(ApplicationStateRunning.java:2016)
at com.evermind.server.ApplicationStateRunning.initDataSourceConnector(ApplicationStateRunning.java:1961)
at com.evermind.server.ApplicationStateRunning.initConnector(ApplicationStateRunning.java:1220)
at com.evermind.server.ApplicationStateRunning.initConnectors(ApplicationStateRunning.java:356)
at com.evermind.server.ApplicationStateRunning.initializeApplication(ApplicationStateRunning.java:208)
at com.evermind.server.Application.setConfig(Application.java:391)
at com.evermind.server.Application.setConfig(Application.java:309)
at com.evermind.server.ApplicationServer.addApplication(ApplicationServer.java:1771)
at com.evermind.server.ApplicationServer.initializeDeployedApplications(ApplicationServer.java:1532)
at com.evermind.server.ApplicationServer.setConfig(ApplicationServer.java:939)
at com.evermind.server.ApplicationServerLauncher.run(ApplicationServerLauncher.java:113)
at java.lang.Thread.run(Thread.java:595)
Caused by: javax.resource.ResourceException: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
at oracle.oc4j.sql.spi.ResourceAdapterImpl.createDataSourceConnectionPool(ResourceAdapterImpl.java:106)
at oracle.oc4j.sql.DataSourceUtils.getDataSourceConnectionPool(DataSourceUtils.java:322)
at com.evermind.server.ApplicationStateRunning.initDataSourceConnectionPool(ApplicationStateRunning.java:1997)
... 11 more
Caused by: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
at oracle.oc4j.sql.config.DataSourceConfigUtils.createConnectionFactory(DataSourceConfigUtils.java:247)
at oracle.oc4j.sql.DataSourceConnectionPoolImpl.<init>(DataSourceConnectionPoolImpl.java:107)
at oracle.oc4j.sql.spi.ResourceAdapterImpl.createDataSourceConnectionPool(ResourceAdapterImpl.java:99)
... 13 more
Caused by: oracle.classloader.util.AnnotatedClassNotFoundException:
Missing class: com.mysql.jdbc.Driver
Dependent class: oracle.oc4j.sql.config.DataSourceConfigUtils
Loader: oc4j:10.1.3
Code-Source: /C:/JDeveloper10g/j2ee/home/lib/oc4j-internal.jar
Configuration: <code-source> in META-INF/boot.xml in C:\JDeveloper10g\j2ee\home\oc4j.jar
This load was initiated at current-workspace-app.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.
at oracle.classloader.PolicyClassLoader.handleClassNotFound(PolicyClassLoader.java:2061)
at oracle.classloader.PolicyClassLoader.internalLoadClass(PolicyClassLoader.java:1665)
at oracle.classloader.PolicyClassLoader.loadClass(PolicyClassLoader.java:1621)
at oracle.classloader.PolicyClassLoader.loadClass(PolicyClassLoader.java:1606)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:242)
at oracle.oc4j.sql.config.DataSourceConfigUtils.createConnectionFactory(DataSourceConfigUtils.java:244)
... 15 more
06/01/31 21:41:08 WARNING: Application.setConfig Application: current-workspace-app is in failed state as initialization failedjava.lang.InstantiationException: Error occurred initializing connectors. Exception is: Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
Jan 31, 2006 9:41:08 PM com.evermind.server.Application setConfig
WARNING: Application: current-workspace-app is in failed state as initialization failedjava.lang.InstantiationException: Error occurred initializing connectors. Exception is: Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
2006-01-31 21:41:08.531 WARNING J2EE 0JR0013 Exception initializing deployed application: current-workspace-app. Error occurred initializing connectors. Exception is: Exception creating connection pool. Exception: oracle.oc4j.sql.config.DataSourceConfigException: Unable to create : com.mysql.jdbc.Driver
Ready message received from Oc4jNotifier.
Embedded OC4J startup time: 29125 ms.I did what Manu suggested with no success. Alternatively, I registered the driver jar with embedded OC4J preferences > global > libraries. Still does not work. Please, note, that when I run JUnit tests against my BC4J application modules with JDBC URL as connection type, everything works just fine. The problem comes while running the JSF application when the application module is using JDBC DataSource as connection type.
-
Hi
I have impoted project file in eclipse in new machine using option import from existing workbence . When i stat to debug this project ,
i am getting error as class not found exception : com.mysql.jdbc.driver . my project folder already consist of mysql .jar file in /web appls/web-inf folder.
Application is running successfully in other machine from where i took the application file. As this error appeared I also added jar file into project path as Project ---->properties-- build java path---libraries----add external jar file.
kindly hep me.Sounds like an eclipse question - not a JDBC one.
But since eclipse is telling you it can't find it then it means it is not in the eclipse path. So you must add it. (The fact that it is somewhere is irrelevant - all that matters is it is not in the class path.) -
Error in Class.forName("com.mysql.jdbc.driver")
Hi forum,
Please help me to solve the issue.
im using the following jsp code for genrating the reports using JASPER REPORTS
the JSP FILE
<%@ page contentType="text/html;charset=windows-1252"%>
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<%@ page import="java.sql.*"%>
<%@ page import="javax.sql.DataSource"%>
<%@ page import="javax.naming.InitialContext"%>
<%@ page import="net.sf.jasperreports.engine.*"%>
<%@ page import="net.sf.jasperreports.engine.design.JasperDesign"%>
<%@ page import="net.sf.jasperreports.engine.xml.JRXmlLoader"%>
<%@ page import="net.sf.jasperreports.engine.export.*" %>
<%@ page import ="net.sf.jasperreports.engine.*"%>
<%@ page import ="net.sf.jasperreports.engine.JasperFillManager"%>
<%@ page import ="net.sf.jasperreports.engine.JRException"%>
<%@ page import="net.sf.jasperreports.engine.JasperReport"%>
<%@ page import="net.sf.jasperreports.engine.JasperPrint"%>
<html>
<body bgcolor="00ffcc">
<%
try{
Connection con = null;
String url="jdbc:mysql://localhost/customer";
String username = "root";
String password = "cmsadmin";
InputStream input=new FileInputStream(new File("C:/Documents and Settings/user/My Documents/NetBeansProjects/jasperreports/web/helloworld.xml"));
JasperDesign design = JRXmlLoader.load(input);
JasperReport report = JasperCompileManager.compileReport(design);
Map params = new HashMap();
params.put("reportTitle", "helloworld");
params.put("author", "Muthu Kumar");
params.put("startDate", (new java.util.Date()).toString());
params.put("ReportTitle", "PDF JasperReport");
<img class="emoticon" src="images/emoticons/confused.gif" border="0" alt="" />Class.forName("com.mysql.jdbc.Driver");<img class="emoticon" src="images/emoticons/confused.gif" border="0" alt="" /><img src="images/emoticons/confused.gif" border="0" alt="" />
con = DriverManager.getConnection(url,username,password);
JasperPrint print = JasperFillManager.fillReport(report, params, con);
OutputStream output=new FileOutputStream(new File("C:/Documents and Settings/user/My Documents/NetBeansProjects/jasperreports/helloreportworld.pdf"));
JasperExportManager.exportReportToPdfStream(print, output);
// JasperViewer.viewReport(print);
catch(SQLException es) {
out.println(es);
catch(JRException ex){
//ex.printStackTrace();
out.println(ex);
%>
</body>
</html>The error it is saying is in the line Class.forName(....) ;
Please look for the emoctions with question mark
i DOn know what to do.
Please help
Im comparin the below JRXML file as with the above code
<?xml version="1.0"?>
<!DOCTYPE jasperReport
PUBLIC "-//JasperReports//DTD Report Design//EN"
"http://jasperreports.sourceforge.net/dtds/jasperreport.dtd">
<jasperReport name="helloworld">
<parameter name="reportTitle" class="java.lang.String"/>
<parameter name="author" class="java.lang.String"/>
<parameter name="startDate" class="java.lang.String"/>
<queryString>
<![CDATA[SELECT * FROM customer order by UserID ]]>
</queryString>
<field name="UserID" class="java.lang.String"/>
<field name="UserName" class="java.lang.String"/>
<field name="City" class="java.lang.String"/>
<field name="State" class="java.lang.String"/>
<title>
<band height="60">
<textField>
<reportElement x="0" y="10" width="500" height="40"/>
<textElement textAlignment="Center">
<font size="24"/>
</textElement>
<textFieldExpression class="java.lang.String">
<![CDATA[$P{reportTitle}]]>
</textFieldExpression>
</textField>
<textField>
<reportElement x="0" y="40" width="500" height="20"/>
<textElement textAlignment="Center"/>
<textFieldExpression class="java.lang.String">
<![CDATA["Run by: " + $P{author}
+ " on " + $P{startDate}]]>
</textFieldExpression>
</textField>
</band>
</title>
<columnHeader>
<band height="30">
<rectangle>
<reportElement x="0" y="0" width="500" height="25"/>
<graphicElement/>
</rectangle>
<staticText>
<reportElement x="5" y="5" width="50" height="15"/>
<textElement/>
<text><![CDATA[UserID]]></text>
</staticText>
<staticText>
<reportElement x="55" y="5" width="150" height="15"/>
<text><![CDATA[UserName]]></text>
</staticText>
<staticText>
<reportElement x="205" y="5" width="255" height="15"/>
<text><![CDATA[City, State]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="20">
<textField>
<reportElement x="5" y="0" width="50" height="15"/>
<textElement/>
<textFieldExpression class="java.lang.String">
<![CDATA[$F{UserID}]]>
</textFieldExpression>
</textField>
<textField>
<reportElement x="55" y="0" width="150" height="15"/>
<textElement/>
<textFieldExpression class="java.lang.String">
<![CDATA[$F{UserName}]]>
</textFieldExpression>
</textField>
<textField>
<reportElement x="205" y="0" width="255" height="15"/>
<textElement/>
<textFieldExpression class="java.lang.String">
<![CDATA[$F{City} + ", " + $F{State}]]>
</textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>Glass_Fish wrote:
I have set the classpath in the environment variables in the my computer properties.The web container has it's own properties. The "system" classpath means absolutely nothing to it. Read your server's documentation. -
I began playing with JDBC a few days ago. I set up a database using mySQL and wrote a simple java program that will connect to it. Works good from the computer that holds the database.
I try and run the same program from my secondary computer which does not have mySQL or ODBC mySQL drivers, I get com.mysql.jdbc.Driver for an error message. (Trying to access the database on my main computer via ip/databasename)
My Question is, do you HAVE to have mySQL or Connector/ODBC installed on a computer if you wish to connect to a database on other computer??
Here's where it prints the error message...
try
Class.forName("com.mysql.jdbc.Driver");
catch (Exception e)
JOptionPane.showMessageDialog(null, "ERROR = " + e.getMessage());
I use this as my url..
private final String url = "jdbc:mysql://122.122.122.122:3306/test123";
Say I want to make a simple web applet that will
access a database on my computer. The only way my
vistors to my website will be able to access the
database via the web applet is by having mySQL JDBC
driver installed on their computers?yes.
however.
you can package up the JDBC driver as part of your jar with your applet so it doesn't require the user to "install" anything. it's just part of your applet. -
I have been developing a project, in which I have a Remote Object(RMI) which returns a ResultSet object obtained by MySql JDBC(J-Connector).
The problem is the ResultSet object does not implement the Serializable Interface so that it cannot be passed to the client site from the remote site through RMI. This is fine, I have other way of solving this, except it will reduce my performance quite a lot!
Therefor, I am wondering how does MYSQL JDBC does this...
I can run a client in one machine and a DB (say MySQL)on the other machine. Using JDBC to connect them, and I can get the ResultSet with no problem at all, this resultset is also remote somehow. My question is how does MYSQL JDBC handle this, so that the data get passed from one mechine to another, and the speed is really fast....
An answer will be a great value to me. Thanks in advance...JDBC connects to the Database not to a Java RMI server. You cannot pass a ReultSet around like this. They retain a connection to the Database (usually) until all rows have been and then still (usually) until closed. For this reason alone, it would be impossible to pass around ResultSets in this manner, and I am sure there are other reasons.
-
Hi!
I´m Trying to load the mysql connector into oracle database.
I create a package to connect to mysql and all that is missing is the jdbc driver.
So i executed loadjava, but i´m getting the error bellow. Can anyone help me?
Oracle database 10g
arguments: '-u' 'vendas/***@idev10g' '-v' '-resolve' '/ora10g/app/oracle/product/10.2.0/db_1/jlib/mysql-connector-java-5.1.12.jar'
dropped : JAVA$CLASS$MD5$TABLE
Exception in thread "main" java.lang.UnsatisfiedLinkError: getClassContext
at com.ibm.jvm.classloader.ClassLoaderUtils.getLastClassLoader(ClassLoaderUtils.java:38)
at java.security.Provider.loadProvider(Provider.java:209)
at java.security.Security$2.run(Security.java:434)
at java.security.AccessController.doPrivileged1(Native Method)
at java.security.AccessController.doPrivileged(AccessController.java:351)
at java.security.Security.getProviderAt(Security.java:431)
at java.security.Security.getAlgClassName(Security.java:583)
at java.security.Security.getAlgClassName(Security.java:637)
at java.security.Security.getImpl(Security.java:1118)
at java.security.MessageDigest.getInstance(MessageDigest.java:135)
at oracle.aurora.server.tools.loadjava.SchemaObject.MD5OfStream(SchemaObject.java:730)
at oracle.aurora.server.tools.loadjava.SchemaObject.getNewMD5(SchemaObject.java:418)
at oracle.aurora.server.tools.loadjava.SchemaObject.doCreate(SchemaObject.java:174)
at oracle.aurora.server.tools.loadjava.SchemaObject.process1(SchemaObject.java:215)
at oracle.aurora.server.tools.loadjava.LoadJava.add(LoadJava.java:548)
at oracle.aurora.server.tools.loadjava.LoadJava.addObject(LoadJava.java:529)
at oracle.aurora.server.tools.loadjava.LoadJava.add(LoadJava.java:467)
at oracle.aurora.server.tools.loadjava.LoadJava.add(LoadJava.java:396)
at oracle.aurora.server.tools.loadjava.LoadJava.addJar(LoadJava.java:743)
at oracle.aurora.server.tools.loadjava.LoadJava.add(LoadJava.java:448)
at oracle.aurora.server.tools.loadjava.LoadJava.add(LoadJava.java:396)
at oracle.aurora.server.tools.loadjava.LoadJava.add(LoadJava.java:365)
at oracle.aurora.server.tools.loadjava.LoadJava.add(LoadJava.java:668)
at oracle.aurora.server.tools.loadjava.LoadJava.processDeferredFiles(LoadJava.java:633)
at oracle.aurora.server.tools.loadjava.LoadJava.process(LoadJava.java:834)
at oracle.aurora.server.tools.loadjava.LoadJava.command(LoadJava.java:267)
at oracle.aurora.server.tools.loadjava.LoadJavaMain.run(LoadJavaMain.java:164)
at oracle.aurora.server.tools.loadjava.LoadJavaMain.main(LoadJavaMain.java:89)I solved it.
I had to increase the java pool memory (first time i run the server complained about it) and then load the mysql jdbc driver executing in sqlplus:
dbms_java.loadjava('path to jdbc driver file');
When executing from console, the loadjava command require extra information (LD_LIBRARY_PATH etc) giving the error i mention above.
Executing from sqlplus it is all set.
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Problem with the deleted instance of the subform in the generated XML
Hi I have a dropdown and it has 3 values in it and I have 3 subforms(min count=0, max count=1). Based on the selection of the dropdown If value is 1, I am adding an instance of subform 1 If value is 2, I am adding an instance of subform 2 and deletin
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RMAN Restore is asking for 3 days tapes in place of 1 day tape
Hi All, I'm doing oracle disaster recovery through RMAN and VERITAS on Solaris machine. Version detail is as follows: Oracle: 8i (8.1.7.4) Veritas: 5.1 Solaris: 8 (5.8) Script to restore and recover database run { allocate channel c1 type 'sbt_tape';
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I admit I am a new mac owner after over a decade of pc. I am completely frustrated trying to get my quicktime movie on my iweb. i have followed every video of the process and imovie tutorials. I have changed this thing into every format possible. I f
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NEED THE BEST QUALITY QUICKTIME MOVIE FOR DVD! THANKS FOR ANY ADVICE.
I just finished a three minute piece that will be shown on DVD and projected to a sixteen foot screen. I usually just output a self-contained quicktime movie with current settings and then compress with bitvice. While I'm happy with those results, be