How to load jdbc driver?
I don't really understand the tutorial when it says to download a driver.
(I use mySql)
http://java.sun.com/docs/books/tutorial/jdbc/basics/connecting.html
That really doesnt describe it well, since i really am new to JDBC.
What do i need to do in order to make the "driver" work with mysql databases?
What about other databases, such as oracle?
What do i need to do in order to make the "driver" work with mysql databases?
What about other databases, such as oracle? For any database you want to use, the driver needs to be accessible in your classpath/buildpath
and what do i need to import?You need to import java.sql.*;
In standard java code there are two important lines to get the connection
String jdbcDriverClass = "com.myql.jdbc.Driver";
String url = "jdbc:mysql://localhost:3306/myDatabase"
String userName = "username";
String password = "password"
Class.forName(jdbcDriverClass);
Connection con = DriverManager.getConnection(url, userName, password);The DriverClass name is different for every database
The url connection is different for every database. For Oracle there are even two different connection strings you can use, depending upon whether you want to use their "thin" driver or the "oci" driver.
Both the driver class name, and the URL connection string will be available from the documentation with the JDBC driver.
Cheers,
evnafets
Similar Messages
-
Java.sql.SQLException: Cannot load JDBC driver class 'null'
Hi,
I am a beginner of using jdbc, i use the tomcat4.1.x, mysql3.23.54 and it's jdbc driver 2.0.14. I place the drive <in jar file> in tomcat/commons/lib and configure the server.xml, web.xml and some testing coding. But there are some error like the following:
java.sql.SQLException: Cannot load JDBC driver class 'null'
at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:529)
at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:312)
at foo.DBTest.init(DBTest.java:18)
at org.apache.jsp.test_jsp._jspService(test_jsp.java:48)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:136)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:204)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:289)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240)
of course its some of the error code and there are more.
Why I have this problems and how can I fix it? Can someone help me??
Thanks,
Tong
I place my test.jsp at tomcat/webapps/DBTest and DBTest.java at tomcat/webapps/DBTest/WEB-INF/classes/foo
additional of the tomcat/conf/server.xml
<Resource name="TestDB" auth="Container" type="javax.sql.DataSource" description="MySQL TestDB"/>
<ResourceParams name="TestDB">
<parameter><name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter><name>maxActive</name><value>10</value></parameter>
<parameter><name>maxIdle</name><value>1</value></parameter>
<parameter><name>maxWait</name><value>10000</value></parameter>
<parameter><name>username</name><value>javauser</value></parameter>
<parameter><name>password</name><value>javadude</value></parameter>
<parameter>
<name>driverClassName</name>
<value>org.gjt.mm.mysql.Driver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:mysql://localhost:3306/javatest?autoReconnect=true</value>
</parameter>
</ResourceParams>
tomcat/webapps/DBTest/WEB-INF/web.xml :
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<description>MySQL Test App</description>
</web-app>Post the part of your code that loads the driver and connects. My guess is you are using a variable for the name of the driver and the variable has not been set to anything(intially set to null).
Thanks
Cardwell -
hi all :)
i'm using a datasource (tomcat 4.1.18 with jdk 1.4)
i'm the following error :
java.sql.SQLException: Cannot load JDBC driver class 'null'my classes12.jar find in $CATALINA_HOME/common/lib
where is ma error ?
thanks a lot.GlobalNamingResources?
I sent up a data source for each app, like this:
<Context path="/api-prototype"
docBase="api-prototype.war"
debug="1"
reloadable="true"
crossContext="true"
useNaming="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost-api-prototype-log."
suffix=".txt"
timestamp="true"/>
<Resource name="jdbc/APIPrototype"
auth="Container"
type="javax.sql.DataSource"/>
<!-- Oracle 9.2.0.1 data source -->
<ResourceParams name="jdbc/APIPrototype">
<parameter>
<name>factory</name>
<value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:oracle:thin:@elvis:1521:CAPP</value>
</parameter>
<parameter>
<name>username</name>
<value>api</value>
</parameter>
<parameter>
<name>password</name>
<value>mod</value>
</parameter>
<parameter>
<name>maxActive</name>
<value>20</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>0</value>
</parameter>
<parameter>
<name>maxWait</name>
<value>60000</value>
</parameter>
<parameter>
<name>removeAbandoned</name>
<value>true</value>
</parameter>
<parameter>
<name>removeAbandonedTimeout</name>
<value>300</value>
</parameter>
</ResourceParams>
</Context>This works fine on Tomcat 4.1.24. I don't know where you got that example from, but I'd recommend that you look at the Tomcat JNDI How-to:
http://jakarta.apache.org/tomcat/tomcat-4.1-doc/jndi-datasource-examples-howto.html
Why go anywhere else? - MOD -
Hi all,
I'm trying to load mysql jdbc driver in runtime i've tried the following links
[http://dev-loki.blogspot.com/2008/01/loading-jdbc-driver-at-runtime.html]
[http://www.kfu.com/~nsayer/Java/dyn-jdbc.html]
[http://www.devdaily.com/java/edu/JDBC-SQLProcessor/Simple_JDBC_Example.shtml]
[http://tech.puredanger.com/2006/11/09/classloader/]
[http://fdt.powerflasher.com/blog/?p=35]
I'm not being able to get this to work it always given the classnotfoundexception
can anyone help please?
Thanks in advanceThere is no server. I'm doing a normal java aplication, i wanted to have a folder where would be the jdbc drivers in runtime the user will choose what driver to load to access a some db.
I'm using eclipse and this is what i have now
import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverPropertyInfo;
import java.sql.SQLException;
import java.util.Properties;
public class DriverShim implements Driver{
private Driver driver;
public DriverShim(Driver d) {
this.driver = d;
public boolean acceptsURL(String u) throws SQLException {
return this.driver.acceptsURL(u);
public Connection connect(String u, Properties p) throws SQLException {
return this.driver.connect(u, p);
public int getMajorVersion() {
return this.driver.getMajorVersion();
public int getMinorVersion() {
return this.driver.getMinorVersion();
public DriverPropertyInfo[] getPropertyInfo(String u, Properties p) throws SQLException {
return this.driver.getPropertyInfo(u, p);
public boolean jdbcCompliant() {
return this.driver.jdbcCompliant();
String libraryPath = System.getProperty("java.library.path");
String sep = System.getProperty("path.separator");
libraryPath = "." + sep + "C:/Users/Luis/Documents/eclipse/workspace/DBDIGGER/lib/connectors" + sep + "native" + sep + libraryPath;
//libraryPath ="C:/Users/Luis/Documents/eclipse/workspace/DBDIGGER/lib/connectors";
System.setProperty("java.library.path", libraryPath);
System.out.println(libraryPath);
URL u;
try {
u = new URL("jar:file://C:/Users/Luis/Documents/eclipse/workspace/DB/lib/connectors/mysql-connector-java-5.1.7-bin.jar!/");
String classname = Settings.MYSQL;
URLClassLoader ucl = new URLClassLoader(new URL[] { u });
URL[] ee =ucl.getURLs();
Driver d = (Driver)Class.forName(classname, true, ucl).newInstance();
DriverManager.registerDriver(new DriverShim(d));
DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql", "user", "pw");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} Project Folder Structure
DB
bin
lib
connectors
mysql-connector-java-5.1.7-bin.jar
src
result of classpath
.;C:/Users/Luis/Documents/eclipse/workspace/DBDIGGER/lib/connectors;native;C:\Program Files\Java\jre6\bin;.;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre6/bin/client;C:/Program Files/Java/jre6/bin;C:\Program Files\JavaFX\javafx-sdk1.1\bin;C:\Program Files\JavaFX\javafx-sdk1.1\emulator\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\Intel\DMIX;C:\Program Files\Softex\OmniPass;C:\Program Files\MySQL\MySQL Server 5.1\bin
Maybe what i'm doing wrong is the classpath, this is not a web app is a standard java aplication...
Could someone explain to me how to set a classpath ?? correctly... -
I am trying to run a program and keep getting the error Failed to load JDBC driver. java.lang.ClassNotFoundException
How can I correct this?I was just trying to execute this example from Deitel's Java book.
import java.awt.*;
import java.sql.*;
import java.util.*;
import javax.swing.*;
public class DisplayAuthors extends JFrame {
// JDBC driver name and database URL
static final String JDBC_DRIVER = "com.ibm.db2j.jdbc.DB2jDriver";
static final String DATABASE_URL = "jdbc:db2j:books";
// declare Connection and Statement for accessing
// and querying database
private Connection connection;
private Statement statement;
// constructor connects to database, queries database, processes
// results and displays results in window
public DisplayAuthors()
super( "Authors Table of Books Database" );
// connect to database books and query database
try {
// specify location of database on filesystem
System.setProperty( "db2j.system.home", "C:/Cloudscape_5.0" );
// load database driver class
Class.forName( JDBC_DRIVER );
// establish connection to database
connection = DriverManager.getConnection( DATABASE_URL );
// create Statement for querying database
statement = connection.createStatement();
// query database
ResultSet resultSet =
statement.executeQuery( "SELECT * FROM authors" );
// process query results
StringBuffer results = new StringBuffer();
ResultSetMetaData metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
for ( int i = 1; i <= numberOfColumns; i++ )
results.append( metaData.getColumnName( i ) + "\t" );
results.append( "\n" );
while ( resultSet.next() ) {
for ( int i = 1; i <= numberOfColumns; i++ )
results.append( resultSet.getObject( i ) + "\t" );
results.append( "\n" );
// set up GUI and display window
JTextArea textArea = new JTextArea( results.toString() );
Container container = getContentPane();
container.add( new JScrollPane( textArea ) );
setSize( 300, 100 ); // set window size
setVisible( true ); // display window
} // end try
// detect problems interacting with the database
catch ( SQLException sqlException ) {
JOptionPane.showMessageDialog( null, sqlException.getMessage(),
"Database Error", JOptionPane.ERROR_MESSAGE );
System.exit( 1 );
// detect problems loading database driver
catch ( ClassNotFoundException classNotFound ) {
JOptionPane.showMessageDialog( null, classNotFound.getMessage(),
"Driver Not Found", JOptionPane.ERROR_MESSAGE );
System.exit( 1 );
// ensure statement and connection are closed properly
finally {
try {
statement.close();
connection.close();
// handle exceptions closing statement and connection
catch ( SQLException sqlException ) {
JOptionPane.showMessageDialog( null,
sqlException.getMessage(), "Database Error",
JOptionPane.ERROR_MESSAGE );
System.exit( 1 );
} // end DisplayAuthors constructor
// launch the application
public static void main( String args[] )
DisplayAuthors window = new DisplayAuthors();
window.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
} // end class DisplayAuthors -
Urgent... unable to load JDBC driver
i have developed a servlet which will establish connection to mySQL.. but it couldn't load the JDBC driver even i placed
[ mysql-connector-java-2.0.14-bin.zip ] in [ C:\j2sdk1.4.2_05\jre\lib\ext\ ]
in fact.. it work fine b4 i format my notebook.. anyone can help me??
pls note that i using APACHE TOMCAT and mySQL 3.23
pls help.. very urgent one
the following is my servlet code.....
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
public class LoginServlet extends HttpServlet {
static final String dbURL = "jdbc:mysql://localhost" ;
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
Connection conn = null;
String nextJSP = null;
try {
Class.forName("org.gjt.mm.mysql.Driver");
catch (ClassNotFoundException e) {
throw new ServletException("Unable to load JDBC driver");
}i already add new variable in environment variables
variable name = CLASSPATH
variable value = C:\j2sdk1.4.2_05\jre\lib\ext\mysql-connector-java-2.0.14-bin.jar;
but the same output is come up.. still unable to load my JDBC driver in TOMCAT... y? -
Hi,
I have an rpt file developed in crystal report 2008. it connects to SQL Server using ODBC(RDO) connection. I have a jsp file that needs to change the datasource to use JDBC (JNDI). The scriptlet for changing datasource is given below. I have my sqljdbc.jar in the web-inf\lib folder of my application as well as in \server\{server_name}\lib folder. when I try to run the jsp it gives me error as follows :
ERROR [com.businessobjects.reports.sdk.JRCCommunicationAdapter] detected an exception: Error loading JDBC driver. The class 'com.microsoft.jdbc.sqlserver.SQLServerDriver' could not be found.
at com.crystaldecisions.reports.queryengine.Connection.t1(Unknown Source)
at com.crystaldecisions.reports.dataengine.dfadapter.DFAdapter.a(Unknown Source)
at com.crystaldecisions.reports.dataengine.dfadapter.DFAdapter.for(Unknown Source)
at com.crystaldecisions.reports.reportdefinition.ReportHelper.a(Unknown Source)
at com.businessobjects.reports.sdk.requesthandler.ReportViewingRequestHandler.long(Unknown Source)
at com.businessobjects.reports.sdk.requesthandler.ReportViewingRequestHandler.a(Unknown Source)
at com.businessobjects.reports.sdk.requesthandler.ReportViewingRequestHandler.byte(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter.do(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter.if(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter.a(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter$2.a(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter$2.call(Unknown Source)
at com.crystaldecisions.reports.common.ThreadGuard.syncExecute(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter.for(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter.int(Unknown Source)
at com.businessobjects.reports.sdk.JRCCommunicationAdapter.request(Unknown Source)
at com.businessobjects.sdk.erom.jrc.a.a(Unknown Source)
at com.businessobjects.sdk.erom.jrc.a.execute(Unknown Source)
at com.crystaldecisions.proxy.remoteagent.RemoteAgent$a.execute(Unknown Source)
at com.crystaldecisions.proxy.remoteagent.CommunicationChannel.a(Unknown Source)
at com.crystaldecisions.proxy.remoteagent.RemoteAgent.a(Unknown Source)
at com.crystaldecisions.sdk.occa.report.application.ds.a(Unknown Source)
at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(Unknown Source)
at ....
<br>
<br>
Scriptlet :
<%
//Report can be opened from the relative location specified in the CRConfig.xml, or the report location
//tag can be removed to open the reports as Java resources or using an absolute path (absolute path not recommended
//for Web applications).
final String DBUSERNAME = "sa";
final String DBPASSWORD = "password";
final String CONNECTION_STRING = "!com.microsoft.jdbc.sqlserver.SQLServerDriver!jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=;user=;password=";
final String TRUSTEDCON = "false";
final String PREQESERVERNAME = "jdbc:microsoft:sqlserver://localhost:1433";
final String SERVERTYPE = "JDBC (JNDI)";
final String DATABASE_DLL = "crdb_jdbc.dll";
final String DATABASE = "bssc";
final String DBCLASSNAME = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
final String USEJDBC = "true";
final String DATABASE_NAME = "bssc";
final String SERVERNAME = "jdbc:microsoft:sqlserver://localhost:1433";
final String CONNECTIONURL = "jdbc:microsoft:sqlserver://localhost:1433";
final String SERVER = "localhost";
%>
<%
final Logger logger = Logger.getLogger(ReportAction.class.getName());
final String REPORT_NAME = "../reports/Krt.rpt";
try {
ReportClientDocument oReportClientDocument = new ReportClientDocument();
oReportClientDocument.open(REPORT_NAME, 0);
// Create the two connectioninfo objects to use
IConnectionInfo oldConnectionInfo = new ConnectionInfo();
IConnectionInfo newConnectionInfo = new ConnectionInfo();
// Assign the old Connection info to the reports current info
DatabaseController dbController = oReportClientDocument.getDatabaseController();
oldConnectionInfo = dbController.getConnectionInfos(null).getConnectionInfo(0);
// If this connection needed parameters, we would use this field.
Fields pFields = null;
// Create a new propertybag for the new location
PropertyBag boPropertyBag1 = new PropertyBag();
// Set new table logon properties
boPropertyBag1.put("JDBC Connection String", CONNECTION_STRING);
boPropertyBag1.put("Trusted_Connection", TRUSTEDCON);
boPropertyBag1.put("PreQEServerName", PREQESERVERNAME);
boPropertyBag1.put("Server Type", SERVERTYPE);
boPropertyBag1.put("Database DLL", DATABASE_DLL);
boPropertyBag1.put("Database", DATABASE);
boPropertyBag1.put("Database Class Name", DBCLASSNAME);
boPropertyBag1.put("Use JDBC", USEJDBC);
boPropertyBag1.put("Database Name", DATABASE_NAME);
boPropertyBag1.put("Server Name", SERVERNAME);
boPropertyBag1.put("Connection URL", CONNECTIONURL);
boPropertyBag1.put("Server", SERVER);
// Assign the properties to the connection info
newConnectionInfo.setAttributes(boPropertyBag1);
// Set the DB Username and Pwd
newConnectionInfo.setUserName(DBUSERNAME);
newConnectionInfo.setPassword(DBPASSWORD);
// The Kind of connectionInfos is SQL
newConnectionInfo.setKind(ConnectionInfoKind.SQL);
// set the parameters to replace.
// The 4 options are:
// _doNotVerifyDB
// _ignoreCurrentTableQualifiers
// _mapFieldByRowsetPosition
// _useDefault
int replaceParams = DBOptions._ignoreCurrentTableQualifiers + DBOptions._doNotVerifyDB;
// Now replace the connections
dbController.replaceConnection(oldConnectionInfo, newConnectionInfo, pFields, replaceParams);
%>
<%
//Report can be opened from the relative location specified in the CRConfig.xml, or the report location
//tag can be removed to open the reports as Java resources or using an absolute path (absolute path not recommended
//for Web applications).
final String DBUSERNAME = "sa";
final String DBPASSWORD = "password";
final String CONNECTION_STRING = "!com.microsoft.jdbc.sqlserver.SQLServerDriver!jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=;user=;password=";
final String TRUSTEDCON = "false";
final String PREQESERVERNAME = "jdbc:microsoft:sqlserver://localhost:1433";
final String SERVERTYPE = "JDBC (JNDI)";
final String DATABASE_DLL = "crdb_jdbc.dll";
final String DATABASE = "bssc";
final String DBCLASSNAME = "com.microsoft.jdbc.sqlserver.SQLServerDriver";
final String USEJDBC = "true";
final String DATABASE_NAME = "bssc";
final String SERVERNAME = "jdbc:microsoft:sqlserver://localhost:1433";
final String CONNECTIONURL = "jdbc:microsoft:sqlserver://localhost:1433";
final String SERVER = "localhost";
%>
<%
final Logger logger = Logger.getLogger(ReportAction.class.getName());
final String REPORT_NAME = "../reports/Krt.rpt";
try {
ReportClientDocument oReportClientDocument = new ReportClientDocument();
oReportClientDocument.open(REPORT_NAME, 0);
// Create the two connectioninfo objects to use
IConnectionInfo oldConnectionInfo = new ConnectionInfo();
IConnectionInfo newConnectionInfo = new ConnectionInfo();
// Assign the old Connection info to the reports current info
DatabaseController dbController = oReportClientDocument.getDatabaseController();
oldConnectionInfo = dbController.getConnectionInfos(null).getConnectionInfo(0);
// If this connection needed parameters, we would use this field.
Fields pFields = null;
// Create a new propertybag for the new location
PropertyBag boPropertyBag1 = new PropertyBag();
// Set new table logon properties
boPropertyBag1.put("JDBC Connection String", CONNECTION_STRING);
boPropertyBag1.put("Trusted_Connection", TRUSTEDCON);
boPropertyBag1.put("PreQEServerName", PREQESERVERNAME);
boPropertyBag1.put("Server Type", SERVERTYPE);
boPropertyBag1.put("Database DLL", DATABASE_DLL);
boPropertyBag1.put("Database", DATABASE);
boPropertyBag1.put("Database Class Name", DBCLASSNAME);
boPropertyBag1.put("Use JDBC", USEJDBC);
boPropertyBag1.put("Database Name", DATABASE_NAME);
boPropertyBag1.put("Server Name", SERVERNAME);
boPropertyBag1.put("Connection URL", CONNECTIONURL);
boPropertyBag1.put("Server", SERVER);
// Assign the properties to the connection info
newConnectionInfo.setAttributes(boPropertyBag1);
// Set the DB Username and Pwd
newConnectionInfo.setUserName(DBUSERNAME);
newConnectionInfo.setPassword(DBPASSWORD);
// The Kind of connectionInfos is SQL
newConnectionInfo.setKind(ConnectionInfoKind.SQL);
// set the parameters to replace.
// The 4 options are:
// _doNotVerifyDB
// _ignoreCurrentTableQualifiers
// _mapFieldByRowsetPosition
// _useDefault
int replaceParams = DBOptions._ignoreCurrentTableQualifiers + DBOptions._doNotVerifyDB;
// Now replace the connections
dbController.replaceConnection(oldConnectionInfo, newConnectionInfo, pFields, replaceParams);
%>
I am not sure why it is not able to get the Driver since the required jar is there in lib folder? Am I missing something ?
Edited by: sb-onward on Jul 30, 2009 6:01 PMHi,
Make sure you have set the Classpath in CRConfig.xml for the jdbc jar.
Place the CrConfig.xml in the classes directory of your application.
Please let me know the results.
Regards,
Neeraj -
Sun IDM Repositor Configuration Error: Failed to load JDBC Driver
Hi Gurus,
I am new to Java IDM and predictably failed in my first attempt to install Java IDM in a Windows machine with SQL Server 2000 SP3.
I followed the Installation document step by step and I think I din' t miss any!!.. But still I got caught by an error, here it is:
I successfully installed IDM but failed while configuring Repository. I have downloaded the JDBC driver from Microsoft for SQL Server 2000, SP3. Then after that I copied the Jar from JDBC driver folder to
%WSHOME%/bin/lib folder. After this I launched the Repository configuration setup.
I got the following error while trying to connect the waveset database with Repository type as SQL Server (JDBC Driver)
com.waveset.util.ConfigurationError: Failed to load JDBC Driver 'com.microsoft.sqlserver.jdbc.SQLServerDriver':
==> java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
The Parameters that I have given for connection are:
URL: jdbc:sqlserver://127.0.0.1:1433;DatabaseName=waveset
JDBC Driver: com.microsoft.sqlserver.jdbc.SQLServerDriver
Connect as User: waveset
Connect Password: waveset
I have created the database and granted all access to user waveset.
Please help me come out of this. I tried dropping and recreating the database with a different name. Still it did not work, looks like it is a JDBC driver specific issue. Please guide me if I did anything wrong.
Appreciate any help
ThanksOpen your driver jar using winzip or something and check if the class: com.microsoft.sqlserver.jdbc.SQLServerDriver is present in the jar. I think you need to use a different class name. or your jar file is wrong. I think there are separate jars for SQL server 2000 and for SQL Server 2005.
-
Beginner Has Problem With Loading JDBC Driver Using MySQL
Hi, I am having problem with loading JDBC driver, and need your diagnotic help.
1. I have installed MySQL (C:\mysql), created a databse (soup), and created a littel table (VIDEOS). I am able to see the table in the console:
sql> select * from videos
2. I have downloaded the latest version of Connector/J (mysql-connector-java-3.1.0-alpha.zip), and unzip the zip file into my C:\ directory.
3. I copied the mysql-connector-java-3.1.0-alpha-bin.jar to the C:\j2sdk1.4.1_02\jre\lib\ext folder and it is in my CLASSPATH
4. MySQL server is running
C:\> C:\mysql\bin\mysqld-nt --standalone
5. open another DOS window and use the database
mysql>USE SOUP
6. succesfully compiled a Java program (javac Test.java):
import java.sql.* ;
public class Test
public static void main( String[] args )
try
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
try
Connection con = DriverManager.getConnection( "jdbc:mysql://localhost:3306/soup" );
try
Statement statement = con.createStatement();
ResultSet rs = statement.executeQuery("SELECT TITLE FROM VIDEOS");
while ( rs.next() )
System.out.println( rs.getString( "TITLE" ) );
rs.close();
statement.close();
catch ( SQLException e )
System.out.println( "JDBC error: " + e );
finally
con.close();
catch( SQLException e )
System.out.println( "could not get JDBC connection: " + e );
catch( Exception e )
System.out.println( "could not load JDBC driver: " + e );
7. when I run the Java program (java Test), I got
the message:
could not load JDBC driver: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
What am I missing?Hi,
I missed to specify test in my last post.
Try running your program by explicitly setting the classspath when
running your program . java -classpath c:\mysql-connector-java-3.1.0-alpha-bin.jar test
Make sure your jar file contains org.gjt.mm.mysql.Driver class -
Java.sql.SQLException: Cannot load JDBC driver
THis topic has been discussed many many times but I still not able to connect to Oracle 8i from my servlet using Tomcat 4.1.12 on hp-ux and java1.3
I always got: java.sql.SQLException: Cannot load JDBC driver class 'null'
In server.xml:
<Context Path="/MyApp" docBase="MyApp" debug="0" reloadable="true" >
<Resource name="jdbc/ora" auth="Container" type="javax.sql.DataSource"/> <ResourceParams name="jdbc/ora" >
<parameter>
<name>username</name>
<value>myname</value>
</parameter>
<parameter> <name>password</name>
<value>mypassword</value>
</parameter>
<parameter> <name>driverClassName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
</parameter>
<parameter>
<name>url</name>
<value>jdbc:oracle:thin:@myhostname:1521:ora</value>
</parameter> </ResourceParams>
</Context>
In MyApp/WEB-INF/web.xml:
<resource-ref>
<res-ref-name>jdbc/ora</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
The Oracle jdbc jar file classes12.jar is under common/lib in Tomcat's home. read Permission is there.
In the servlet:
init(ServletConfig config):
Context init = new InitialContext();
Context ctx = (Context) init.lookup("java:comp/env");
dataSource = (DataSource) ctx.lookup("jdbc/acdb");
doPost(..)
the error occured at :
synchronized (dataSource){
con = dataSource.getConnection();}
Thanks in advance!Everything looks correct to me, except for one thing.
In your web.xml you have this:
<res-ref-name>jdbc/ora</res-ref-name> In your server.xml, you have this tag, which matches your web.xml:
<ResourceParams name="jdbc/ora" > But in your Java code, you've got this:
dataSource = (DataSource) ctx.lookup("jdbc/acdb"); When I've successfully set up a Web app data source, all three names had to agree. You either need to change your Java lookup name to "jdbc/ora" or change the web.xml and server.xml to "jdbc/acdb".
See if that does it. Everything else sounds correct to me. - MOD -
Can't load jdbc driver in servlet
Dear All,
I have tried to connect to MS SQL SERVER 2000 through JDBC DRIVER FOR
SQLSERVER. However I receieved an error: can't load jdbc driver class:
null.
The following steps were what I did:
1.Set up SQL Server and create a few tables and users.
2.Config Server.xml
Add the following codes in /tomcat/conf/Server.xml
<Context path="/persistence" docBase="persistence" debug="0"
reloadable="true">
<Resource name="jdbc/persistenceDB" auth="Container"
type="javax.sql.DataSource"/>
<ResourceParams name="jdbc/PersistenceDB">
<Parameter>
<name>user</name>
<value>kitty</value>
</Parameter>
<Parameter>
<name>password</name>
<value>abc</value>
</Parameter>
<Parameter>
<name>driverClassName</name>
<value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
</Parameter>
<Parameter>
<name>url</name>
<value>jdbc:microsoft:sqlserver://localhost:1433;databaseName=persistence;selectMethod=cursor;</value>
</Parameter>
</ResourceParams>
</Context>
3.Config my web application's web.xml
Added the following piece of code in WEB.XML
<resource-ref>
<res-ref-name>jdbc/persistenceDB</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
4.Use Datasource in my code
package persistence.database;
import java.sql.*;
import javax.naming.InitialContext;
import javax.sql.DataSource;
import javax.servlet.ServletContext;
import persistence.*;
import com.microsoft.jdbcx.sqlserver.*;
import javax.naming.Context;
public class DatabaseAuthenticator implements Authenticator {
private DataSource ds;
public void init(ServletContext sctx) throws Exception {
InitialContext init = new InitialContext();
try{
Context ctx = (Context) init.lookup("java:/comp/env");
ds = (DataSource) ctx.lookup("jdbc/persistenceDB");
} catch (Exception e) { e.printStackTrace();
public User authenticate(String username, String password)
throws AuthenticationException, UnknownException {
Connection conn = null;
PreparedStatement pstmt = null;
ResultSet rs;
try {
if (ds != null) {System.out.println("Success to get
datasource");
} else {System.out.println("Failed");}
System.out.println(ds.toString());
try
conn = ds.getConnection();
catch (Exception e)
e.printStackTrace();
pstmt = conn.prepareStatement("SELECT user_id " + .........
5. put msutil.jar, mssqlserver.jar and msbase.jar under /tomcat/common/lib/.
When I tried to run the program, I receieved an error: can't load jdbc
driver class: null.
I've got no idea what's going on.
Any Suggestion?
Thanks in advance
KittyHi Kitty,
The connection you're trying to set up points to nothing :
Connection conn = null;
So, you receive a complaint that that driver cannot be loaded. Please read
http://java.sun.com/docs/books/tutorial/jdbc/basics/connecting.html
download the right database driver and use that. Good luck!
Wouter van Reeven
public User authenticate(String username, String
g password)
throws AuthenticationException, UnknownException
ption {
Connection conn = null;
PreparedStatement pstmt = null;
ResultSet rs; -
How to load specific driver for specific device not having PnP-ID?
Hello,
as mentoined in a previous post I'm up to adapt an exisiting PCMCIA-based PC Card driver so that it can be used with a PCMCIA/USB adaptor (by using it's driver's IOCTLs), and already had
some success on it: My driver loads and I can read files (for example, in Windows Explorer) from the card as it did before in "PCMCIA version" (I intend to support both with the same driver, which seems
to work at the moment). As it did before, the driver currently creates a MTD (memory technology device). My main "problem" is how to load the driver.
The situation is a bit complicated, I try to give as much details as possible.
For better understanding
The PCMCIA/USB adaptor's driver usually has following device stack: PCMCIA/SUB adaptors driver -> USB mass storage device (USBSTOR.SYS) -> Diskdrive (DISK.SYS [->PARTMGR.SYS]). For more ease - to see if my driver works in general - I installed my driver
via INF using the PnP ID of the "USB mass storage device", with other words I "replaced" the USB mass storage driver with my own driver.
This is my problem
This means - and that is currently my problem - that may driver gets loaded regardless of what is attached to the PCMCIA/USB adaptor. Usually, when attached to PCMCIA, the PC card has a PnP ID the driver can be assigned to. In my case, I have no PnP ID for
the PC card, and the driver may stop because the attached device is not supported The driver will unload properly, but the device remains with error code (in device manager).
What I want to avoid
I already thought about filter drivers between USBSTOR and the PCMCIA/USB adaptor's driver (#1), or above the USB mass storage device (#2). If I'm correct, that means that I have to handle URB/CBW requests for case #1 or at least SCSI requests for case #2 -
but I'm currently not familiar with filter drivers, URB/CBW and/or SCSI. Porting the driver was quiete frustating until yet and I had to get familiar with a couple of technologies that belongs to the driver's functinaliy itselfs -
I hope you understand that I want to avoid getting familiar with more technologies than required.
I think there must be a way to check the device (PC card) at the PCMCIA/USB adaptor
before my driver will be loaded, as well as removing the deivce completely if the PC card was removed (so that it disappears in device manager). But I'm currently have no idea how to do that. Is it possible to
load my driver along the device/driver stack usually created by the PCMCIA/USB adaptor's driver?
Some answerers likes to refer to WDK documentation and samples. In such case - because of their complexity, it would be nice to get a hint about where to start.
Have much thanks in before for any suggestions!
Regards,
Willi K.Today's memory cards (like CFC) manage their FTL (flash translation layer) in their firmware. Our PC card is quiete old technology and does not have such firmware, this is why Windows cannot recognize the file system (FAT). For example, a request to offset
0 may be somewhere else on our PC Card.
I followed your suggestion and used the HWID of device that appears "above" the USB mass storage device, and my driver seems to work as it did before - OK, made no difference.
But if my driver does not recognize the card (because it is not present or it is another PCMCIA device -> STATUS_NOT_SUPPORTED or STATUS_NO_MEDIA in driver entry), and the device is shown with exclamation mark in device manager.
Two questions remain:
- How can I ensure that other drivers may attach if my driver does not support the device inserted in the adapter?
- How can I force a "re-check" of my driver if there was no card present when driver was loaded?? -> Note: A disk drive always appears in device manager - regardless if a device is attached to the apator or not -
VDS didn't start: Could not load JDBC driver
Hello,
I want to start the VDS Tutorial, but I get an error:
Exception: Data source 'Derby database' failed. Check your CLASSPATH! (in Tools
-> Options) Could not load JDBC driver 'org.apache.derby.jdbc.EmbeddedDriver'
Shutting down...
Data source 'Derby database' failed. Check your CLASSPATH! (in Tools -> Options)
Could not load JDBC driver 'org.apache.derby.jdbc.EmbeddedDriver'
But I add the derby.jar file in the VDS under Tools - Options - Classpath
Have you any ideas...?!I try to start the server without the tutorial and that works...
-
Initialization error: Loading jdbc driver
Hi ,
In a file-XI-JDBC scenario, i am getting this error. "Initialization error: Loading jdbc driver 'com.microsoft.jdbc.sqlserver.SQLServerDriver' failed: java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver".
but i have installed/deployed third party SQL driver on J2ee server thru SDM.
Can any one sort out this problem.
Rgds
SridharHi,
try looking into the log viewer in Vsual Administrator. Usually you can find more information about the problem there.
Also try redeploying the driver again.
cheers,
naveen -
ZipException in Loading JDBC Driver
Getting java.util.zip.ZipException trying to Load JDBC Driver Class.
The JDBC driver classes are in a jar file which is in WEBLOGIC_CLASSPATH.The
jar file is perfectly valid, atleast I can see it with "jar".
It works fine If I extract the jar file into my serverclasses which is in
WEBLOGIC_CLASSPATH.
We are running WLS51SP10 on AIX4.3.3. Classic VM (J2RE 1.2.2 IBM build
ca122-20010313 (JIT enabled: jitc))
I appreciate any help on this.
Thanks,
Pavan
This is the first few lines from the exception stacktrace.
java.util.zip.ZipException: invalid LOC header (bad signature)
at java.util.zip.ZipFile.read(Native Method)
at java.util.zip.ZipFile.access$5(ZipFile.java(Compiled Code))
at
java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java(Compiled Code))
at java.util.zip.ZipFile$1.fill(ZipFile.java(Compiled Code))
at
java.util.zip.InflaterInputStream.read(InflaterInputStream.java(Compiled
Code))
at weblogic.boot.ZipSource.getBytes(ZipSource.java(Compiled Code))
at
weblogic.boot.ServerClassLoader.findLocalClass(ServerClassLoader.java(Compil
ed Code))
at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))
at java.lang.Class.forName1(Native Method)
at java.lang.Class.forName(Class.java(Compiled Code))
at common.cimsdao.DaoConnection.getConnection(DaoConnection.java:66)Hi.
You might try getting another copy of the driver. It could be corrupted in some
way but still work with the jar utility.
Regards,
Michael
Pavan Dinavahi wrote:
Getting java.util.zip.ZipException trying to Load JDBC Driver Class.
The JDBC driver classes are in a jar file which is in WEBLOGIC_CLASSPATH.The
jar file is perfectly valid, atleast I can see it with "jar".
It works fine If I extract the jar file into my serverclasses which is in
WEBLOGIC_CLASSPATH.
We are running WLS51SP10 on AIX4.3.3. Classic VM (J2RE 1.2.2 IBM build
ca122-20010313 (JIT enabled: jitc))
I appreciate any help on this.
Thanks,
Pavan
This is the first few lines from the exception stacktrace.
java.util.zip.ZipException: invalid LOC header (bad signature)
at java.util.zip.ZipFile.read(Native Method)
at java.util.zip.ZipFile.access$5(ZipFile.java(Compiled Code))
at
java.util.zip.ZipFile$ZipFileInputStream.read(ZipFile.java(Compiled Code))
at java.util.zip.ZipFile$1.fill(ZipFile.java(Compiled Code))
at
java.util.zip.InflaterInputStream.read(InflaterInputStream.java(Compiled
Code))
at weblogic.boot.ZipSource.getBytes(ZipSource.java(Compiled Code))
at
weblogic.boot.ServerClassLoader.findLocalClass(ServerClassLoader.java(Compil
ed Code))
at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code))
at java.lang.Class.forName1(Native Method)
at java.lang.Class.forName(Class.java(Compiled Code))
at common.cimsdao.DaoConnection.getConnection(DaoConnection.java:66)--
Michael Young
Developer Relations Engineer
BEA Support
Maybe you are looking for
-
Acrobat 6.0 Pro PDF Maker & CutePDF
Hi there, I have Acrobat 6.0 Professional installed on my computer (Windows XP). I recently had CutePDF installed on my system as well. Since this, my Acrobat PDF Maker will not create a PDF (from Excel 2002) as it used to. It freezes up part way thr
-
How to alter country in registration form.
I successfully upgrade my MacBook from Tiger to Leopard. When I restarted my Mac, the 'Setup Assistance' brought me to registration page but the form is for US resident. The form did not contain field 'Country' and contain 'State'. I am not US reside
-
Interface Mapping javax.xml.transform.TransformerException: com.sap.engine.lib.xml.parser.ParserException: XML Declaration not allowed here.(:main:, row:1, col:7) at com.sap.engine.lib.jaxp.TransformerImpl.transform(TransformerImpl.java:251) at com.s
-
How can i get rid of the iTunes logo after updating my iPhone 4 to the iOS 6
How can I get rid of the iTunes logo after updating my iPhone to iOS 6
-
Hello Gurus, I have an issue with an Idoc Invoic01 for MM Invoice. Although the tax rate populated in the Idoc is 20% and the OBCD correctly mapped to a 20% code it is saying me that the code derived is a 19,6% one and that the amount received is 0%