MySQL advantages with Java server

Hi, all!
It's not other question about "MySQL vs PostgreSQL". I read a lot of things on the internet about this topic.
What I would like to know is that, cosidering that the Sun bought MySQL, does MySQL have any advantage over PostgreSQL when using a Java server?
If not, does anyone know about any proposal of doing this?
Thank you!
CaioToOn!

Looking at how products like OpenOffice or Solaris have been changed by Java, I would say don't assume that Sun have some overall plan integrate their products any more than might be perceived as "natural"

Similar Messages

Is it possible to insert data into a MySQL database with Java?

Hello everyone!
I would like to know, if it's possible to insert data into a MySQL database, with a JFrame inside a servlet?
When the JFrame is first created it calls this method:
     * Connects the servlet with the MySQL database.
    private void connect(){
        try{
            Class.forName("com.mysql.jdbc.Driver");
            connection = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/data", "root", "omfg123");
        }catch(ClassNotFoundException cnfe){
            cnfe.printStackTrace();
        }catch(SQLException sqle){
            sqle.printStackTrace();
    }Then, when you click the "Add" button, it executes this code:
            add.addActionListener(new ActionListener(){
                @Override
                public void actionPerformed(ActionEvent ae){
                    String employee = employeeName.getText();
                    String[] args = employee.split(" ");
                    firstName = args[0];
                    lastName = args[1];
                    execute();
            });And this is my "execute()" method:
     * Connects the servlet with the MySQL database.
     * - And executes the SQL queries.
    private void execute(){
        try{
            PreparedStatement statement = connection.prepareStatement("insert" +
                    " into employees values(" + firstName + ", " + lastName
                    + ")");
            ResultSet result = statement.executeQuery();
            String fullName = firstName + " " + lastName;
            printer.write("Employee " + fullName + " added.</br>");
        }catch(SQLException sqle){
            sqle.printStackTrace();
    }But when I click the "Add" button, nothing happens.

This is what I use to insert into mysql. It works on windows.
try {
            Class.forName("com.mysql.jdbc.Driver");
            String connectionUrl = "jdbc:mysql://" + loadip + "/custsig?" +
                    "user=root&password=";
            Connection con = DriverManager.getConnection(connectionUrl);
            newproc = jTextField1.getText();
            newsoft = jTextField2.getText();
            newdeb = jTextField3.getText();
            newcust = jTextField4.getText();
            if (newcust.equals("")) {
                errorsig12 = 1;
                jLabel1.setForeground(new java.awt.Color(255, 0, 0));
            } else if (newsoft.equals("")) {
                errorsig12 = 1;
                jLabel2.setForeground(new java.awt.Color(0, 0, 0));
            } else if (newproc.equals("")) {
                errorsig12 = 1;
                jLabel3.setForeground(new java.awt.Color(0, 0, 0));
            } else if (newdeb.equals("")) {
                errorsig12 = 1;
                jLabel4.setForeground(new java.awt.Color(0, 0, 0));
            if (errorsig12 == 0) {
                PreparedStatement ps = con.prepareStatement("insert into customer set cust_name = ?, software = ?, processor = ?, debit = ?");
                ps.setString(4, newdeb);
                ps.setString(3, newproc);
                ps.setString(2, newsoft);
                ps.setString(1, newcust);
                int rs = ps.executeUpdate();
        } catch (SQLException eg) {
            System.out.println("SQL Exception: " + eg.toString());
        } catch (ClassNotFoundException cE) {
            System.out.println("Class Not Found Exception: " + cE.toString());
        }

What are the cool things that I can i do with java (server side) knowledge?

My boss is about to send me to class for Java (Server Side) Programming. I am a novice programmer who knows only COBOL and C.
What can i do with that class?

Well you can do anything a cgi can do and then some.Just do a search on servlets or cgi and that will give you a good idea of what can be done
Here is a couple of links for ya
http://www.coolservlets.com/
http://www.javazoom.net/jzservlets/servlets.html
http://archive.coreservlets.com/
and here is a cgi one http://cgi.resourceindex.com/Programs_and_Scripts/Perl/
well this hosud give you and idea what you can do with server side programs

Interesting! C client socket communicating with java server sockets after..

Hi,
I have a client(in C) open a socket and server(in java; jvm 1.2) listening on the same port(e.g. 4444) accepts the request and establishes a socket conn. Now the sockets are kept open indefinitely. If I kill the server process and bring it backup, the client(in C) cannot communicate with the server(in java).
Why would this be happening? Aren't the server socket garbage collected?
How do I make sure that the next time I bring up the server again, the client communicates with it.
Any inputs is really appreciated.
thanks
atul.

Check the client is closing the connection before it stops.
I've had similar problems with JDBC before where if you don't explicitly close the connection it remains bound to the port, hence if your client only ever tries to connect to that port it will fail.
I think.
MrChris

Flash client communication with Java server

I have written a Flash client in actionscript-3 and I have a Java server that is running locally using command prompt. I run the Flash app using Ctrl+Enter in Flash CS4 IDE and I am trying to receive some numbers from the server. I get the following message at trace output:
Error #2044: Unhandled securityError:. text=Error #2048: Security sandbox violation: file:///C|/Documents%20and%20Settings/****/My%20Documents/CODE/FLASH/FlashApp/FlashApp.sw f cannot load data from localhost:12345.
Why? What must i do to overcome this?
Also when i publish the Flash app and use xampp to run a local web server and then use web browser to access FlashApp.html i also cannot receive any numbers from the java socket server that runs locally (on the same pc as the flash app does).

Flash makes a request to the socket server automatically, if it doesn't get the proper response (a cross-domain XML document), then it won't connect.
Here are a couple of links to get you started:
http://help.adobe.com/en_US/as3/dev/WS5b3ccc516d4fbf351e63e3d118a9b90204-7c60.html
http://www.adobe.com/devnet/air/flex/quickstart/articles/communicating_with_sockets.html
If you have questions after reviewing these articles, let me know.

UD connection with MYSQL database in java server

HI Friends,
Tried to create UD type of source system ,in the proposal i got below error.Please advice me.
Error message :
Error while extracting field list of UD Connect object: UDCADAPTERROR::RSSDK|200|Cannot open the connectio
Message no. RSDS_ACCESS036
Regards,
Sreenivas.T.K.

Hi,
Please check this note Note 946541 - Connection error causing table not found in UDConnect
Thanks,
Deepthi

SQL query with Java Server Pages

Hey,
I'm trying to read some information from database with SQL Query. How I can put the parameter that I get from previous *.jsp page to SQL query?
Technologies that I use are WML, JSP and MySQL.
I can get the parameter by method getParameter() and it is correct.
But how to but the requested parameter into sql query and complete the sql query?
Should I read it to some variable before putting it to sql query?
*/ this works fine */
out.println("<p>periodi"+request.getParameter("periodi"+"loppu</p>");
/* this doesn't work */
ResultSet tulokset = lause.executeQuery("select * from kurssi where periodi='+request.getParameter("periodi")+'");
/* this doesn't work */
String periodi=request.getParameter("periodi");
ResultSet tulokset = lause.executeQuery("select * from kurssi where periodi='periodi' '");
Thanks,
Rampe

Hey,
I'm trying to read some information from database
se with SQL Query. How I can put the parameter that I
get from previous *.jsp page to SQL query?
Technologies that I use are WML, JSP and MySQL.
I can get the parameter by method getParameter()
() and it is correct.
But how to but the requested parameter into sql
ql query and complete the sql query?
Should I read it to some variable before putting it
it to sql query?
*/ this works fine */
out.println("<p>periodi"+request.getParameter("periodi"
"loppu</p>");
/* this doesn't work */
ResultSet tulokset = lause.executeQuery("select * from
kurssi where
periodi='+request.getParameter("periodi")+'");
/* this doesn't work */
String periodi=request.getParameter("periodi");
ResultSet tulokset = lause.executeQuery("select *
* from kurssi where periodi='periodi' '");
Thanks,
RampeTry this
ResultSet tulokset = lause.executeQuery("select * from kurssi where periodi=" + "'" +request.getParameter("periodi")+"' " );this should work

Reading and writing to a MySQL database with Java

Anyone knows what's the best way to read and write from a MySQL database?

> Anyone knows what's the best way to read and write
from a MySQL database?
Yep!
The Java� Tutorial - Trail: JDBC� Database Access
MySQL Reference Manual
MySQL Connector/J Documentation
Driver/Datasource Class Names, URL Syntax and Configuration Properties for Connector/J
Best of luck!
~

MySQL Connectivity with Java

I amusing Connector/j 3.0 for jdbc through MySQL.
I am also using "org.gjt.mm.mysql.Driver"
Please suggest how to set the classpath/path for mysql driver and where to put the driver,
Please suggest with all configuration details.........

http://www.dynamic-apps.com/tutorials/classpath.jsp

Mysql conn with remote server

Good evening,
I have my db loaded, phpmyadmin loaded all on my remote server, went in the phpmyadmin and created my table, now I am in dreamwever cs4 and want to conn to my db
on server tab I put
' mysqlXX.webcontrolcenter.com ' (where XX is my server #),
but i keep getting "an unidenfied error occour"thats all.
Any ideas or is there something I am missing, Thx

ok, but answer this to me, if I used phpmyadmin on my remote site which my host set up, and gave me my server addy for mysql. I went on line and to my phpmyadmin set up my table users. Now in dreamweaver my site is defined, local, testing, and remote. I now make a connection to mysql, click the plus and then mysql connection, dialog box comes up, I put conn name in, host addy (from my hoster), username and pw from when I set up phpmyadmin on the remote server, click test and works, check out the table users and all the info is now in dreamweaver, how did it get that info if not getting from remote? thx

Java Server Pages Programming Database Access Error Through Tomcat

Question# 1
I am trying to access MYSQL Database through JAVA Server Pages programming using Tomcat Server as web server on win xp.
Whenever I give following url http://localhost:8080/jspBook/ch1/customers.jsp in web browser , I get followin errors.
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NullPointerException
org.apache.jsp.ch1.customers_jsp._jspService(org.apache.jsp.ch1.customers_jsp:96)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.15 logs.
Apache Tomcat/5.5.15
I am facing this problem since one month. I tried searching on google, but could not get concrete answer. I have configured mysqlconnector to connect to mysql and also configured other things in Tomcat's webapps folder. But I could not overcome this error.
Please reply urgently. Thankz for the help and time. ?

<%@ page import="java.sql.*" %>
<%@ page contentType="text/html" %>
<html>
<head>
     <title>Insurance Quoting System</title>
</head>
<body>
<basefont face="Arial">

<%! ResultSet rs = null;%>

<%
     try {
          Class.forName("org.gjt.mm.mysql.Driver");
          Connection db = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/quoting");
          Statement s = db.createStatement();
          rs = s.executeQuery("select * from customer");
     catch (Exception e) {
// For now, just report the error to the system log
     System.out.println(e.toString());
%>

<table width="550" border="0" align="center">
<tr>
<td bgcolor="#006633">
<div align="center">
          <font size="6" color="#FFFFFF"><b>Insurance Quoting System</b></font>
     </div>
</td>
</tr>
<tr>
<td>
<p> </p>
<p> </p>
<p align="center"><b>Customers</b></p>
<table width="290" border="0" align="center">
<%
     try {
          while (rs.next()) {
%>

     <tr>
          <td width="20"><%= rs.getInt(1) %></td>
          <td width="70"><%= rs.getString(2) %></td>
          <td width="70"><%= rs.getString(3) %></td>
          <td width="40">
               <a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=edit">edit
</a>
          </td>
          <td width="40">
               <a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=delete">delete
</a>
          </td>
          <td width="40">
               <a href="custMaint.jsp?id=<%= rs.getString(1) %>&action=newQuote">new quote
</a>
          </td>
     </tr>
<%
     catch (SQLException e) {
     // For now, just report the error to the system log
     System.out.println(e.toString());
%>
</table>
</td>
</tr>
<tr>
     <td>
          <p> </p>
     <p align="center">New Customer</p>
     </td>
</tr>
</table>
</body>
</html>
I have tried all possible configurations of classpath with mysqlconnectorj and Tomcat, but i could not find any solution. Plz help urgently. Thankz a lot.

Your DB connection is probably failing
As a result your result set "rs" is null when you get to it later on, causing a null pointer exception.
Do you need to provide a username/password for your database?
Have you configured your database to allow connections from localhost?
If you haven't already figured it out, doing SQL programming in a JSP is bad practice. Put your SQL code into a java bean / class where it belongs.

Should we avoid Graphical mapping and stick with Java mapping?

After developing mappings in XI for a month, I just don't see any good reasons to use Graphical mappings over Java mappings. Maybe some experienced users here can give me some valid reasons why we should choose Graphical mappings. Here is what I think:
Disadvantages of Graphical mappings:
1. No way to perform automated unit testings. This is probably the biggest reason I hate it. You can do some tests manually when you work in Integration Builder. But there is no way you can write some unit testing utilities to automate the task.
2. Complexity. Even for some simple requirements, your Graphical mappings can become complicated and hard to understand. A lot of times, I find myself staring at several dozens of graphical nodes and try to understand what it does.
3. Impossible to reuse. This is totally against the DRY (Don't repeat yourself) principle. For example, to generate messages for JDBC adapter, it is common to have two identical fields for primary keys: one in the access node and another in the key node. If you change the mapping logic in one, you have to remember to change the other.
Advantage with Java mappings:
1. Fully automated unit testing. You can create JUnit tests along with your Java mapping classes and use Maven or other build tools to perform automated unit testing.
2. Your choice of XML parsing and binding. With Java mapping, you can choose any open source framework for XML parsing and binding. For example, with XMLBeans, I can convert XML input message to a Java object, transform to another Java object and write to output message. And each Java object is generated from its corresponding XML schema.
3. Highly reusable. We can use fundamental object-oriented designs to create highly reusable mapping components.
4. Better version control. Since the mappings are just Java classes, we can use CVS or SVN to track code changes.
5. Better build tools. We can fully utilize build tools like Ant and Maven to automate the build, unit tests, or even generate documents and mapping web sites.
So do you guys agree? Maybe I am still new to XI or I am missing some important things. But at this point, I just don't see why I should use Graphical mappings. Is there anyone developing XI interfaces completely with Java mappings?
Thanks in advance for any comments!
Kenny Cheang

Hi Suraj,
> Since its graphical the blocks will take space, but
> there is always an adavntage of processing time.
> Ebven though it may appear bigger, it will take less
> time as compared with Java code (for the same
> mapping).
Could you explain more why the graphical mapping has better performance? I thought the graphical mapping is compiled into a Java class in the runtime anyway.
> Yes thats there, but same goes with Java mapping too
> right (if you haven't mentioned it as constants)
I mainly think about inheritance. If I have to build 10 interfaces and they all have some common behavior, I can create a base interface class to encapsulate the common logic. But with graphical mapping, you have to duplicate them in each interface.
> Disadvantages of Java mapping:
> 1. Performance
Same as above. I just don't see why Java has worse performance. I actually think Java should have better performance. You can optimize the code anyway you want. In some cases, you have to use queue functions in graphical mapping but it's not necessary in Java.
> 2. All might not be well versed with Java Code(though
> everyone may know basic java) .
I am not asking everyone to abandon graphical mapping. I am just wondering which one is better when you have skills for both.
> 3. Lot of standard functions are available in GM
> which you can choose, but you have to remember the
> exact code for those in Java mapping.
You can create functions in Java too. All you have to do is to remember the function name.
Kenny

Recommended portel type for Java Server Faces in Portal 10G

Hi all,
What is the best [or recommended] portlet type to use to interact with Java Server Faces in Oracle Portal 10G. We a planning to use a WSRP portlet type in our current project and would like to know if this is a good/feasible approach, or whether another portlet type would be recommended.
Thanks in advance!

Entry-level stuff is linked from http://www.jsftutorials.net/
Samples with tables... eg. the MyFaces examples which show all myfaces components. http://myfaces.apache.org -> just download the binaries and sources and check out the samples
hth
Alexander

Java mysql OK with Terminal but not OK with Apache local web server

With terminal I have :
CLASSPATH=/System/Library/Frameworks/JavaVM.framework/Versions/1.4.2/Classes/:/Library/Java/Extensions/:./
SUDO_GID=20
SECURITYSESSIONID=210800
_=/usr/bin/printenv
127:/Library/WebServer/Documents/Java root# java TestMySQL
2006-05-21 13:39:00.0 ************************************************** = OK
127:/Library/WebServer/Documents/Java root#
import java.sql.*;
* mysql-connector-java-3.1.12-bin.jar
*   % javac /Library/WebServer/Documents/Java/TestMySQL.java
*   % java TestMySQL
public class TestMySQL {
        public static void main(String argv[]) throws Exception {
                // Load the driver class
                Class.forName("org.gjt.mm.mysql.Driver");
1                //Class theClass = null;
2               //try {
3                //    theClass = Thread.currentThread().getContextClassLoader().loadClass("org.gjt.mm.mysql.Driver");
4                //}
5                //catch (ClassNotFoundException e) {
6                //    theClass = getClass().getClassLoader().loadClass("org.gjt.mm.mysql.Driver");
7                //}
                Connection conn = DriverManager.getConnection(
                        "jdbc:mysql:///test",
                Statement stmt = conn.createStatement();
                ResultSet rset = stmt.executeQuery("SELECT now();");
                while (rset.next()) {
                        System.out.println(rset.getString(1));
                // Close result set, statement and DB connection
                rset.close();
                stmt.close();
                conn.close();
}I have a simple TestMySQL.html file with applet TestMySQL.class in it.
Nothing but "Applet TestMySQL not inited"
When I uncomment the try/catch lines (lines 1 to 7) , java compiler generate an error... near getClass().getClassLoader().loadClass("org.gjt.mm.mysql.Driver");
With "Class.forName("org.gjt.mm.mysql.Driver");" no problem.
Running MacOS X 10.3.9, Apache/1.3.33 (Darwin) PHP/4.4.1 mod_ssl/2.8.24 OpenSSL/0.9.7i and JVM 1.4.2_09
Thanks for help.
P.S. This my first approach to java/mysql but I would like to see this short program running on my local web server ...
Thanks.

hi :-)
can you post the stack trace?
im not sure what is causing the error because of less info,
but have you tried to copy the driver of mysql to tomcat lib folder?
regards,

How to handle blob data with java and mysql and hibernate

Dear all,
I am using java 1.6 and mysql 5.5 and hibernate 3.0 . Some time i use blob data type . Earlier my project's data base was oracle 10g but now i am converting it to Mysql and now i am facing problem to save and fetch blob data to mysql database . Can anybody give me the source code for blob handling with java+Mysql+Hibernate
now my code is :--
==================================================
*.hbm.xml :--
<property name="image" column="IMAGE" type="com.shrisure.server.usertype.BinaryBlobType" insert="true" update="true" lazy="false"/>
===================================================
*.java :--
package com.shrisure.server.usertype;
import java.io.OutputStream;
import java.io.Serializable;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import javax.naming.InitialContext;
import javax.sql.DataSource;
import oracle.sql.BLOB;
import org.hibernate.HibernateException;
import org.hibernate.usertype.UserType;
import org.jboss.resource.adapter.jdbc.WrappedConnection;
import com.google.gwt.user.client.rpc.IsSerializable;
public class BinaryBlobType implements UserType, java.io.Serializable, IsSerializable {
private static final long serialVersionUID = 1111222233331231L;
public int[] sqlTypes() {
return new int[] { Types.BLOB };
public Class returnedClass() {
return byte[].class;
public boolean equals(Object x, Object y) {
return (x == y) || (x != null && y != null && java.util.Arrays.equals((byte[]) x, (byte[]) y));
public void nullSafeSet(PreparedStatement st, Object value, int index) throws HibernateException, SQLException {
BLOB tempBlob = null;
WrappedConnection wc = null;
try {
if (value != null) {
Connection oracleConnection = st.getConnection();
if (oracleConnection instanceof oracle.jdbc.driver.OracleConnection) {
tempBlob = BLOB.createTemporary(oracleConnection, true, BLOB.DURATION_SESSION);
if (oracleConnection instanceof org.jboss.resource.adapter.jdbc.WrappedConnection) {
InitialContext ctx = new InitialContext();
DataSource dataSource = (DataSource) ctx.lookup("java:/DefaultDS");
Connection dsConn = dataSource.getConnection();
wc = (WrappedConnection) dsConn;
// with getUnderlying connection method , cast it to Oracle
// Connection
oracleConnection = wc.getUnderlyingConnection();
tempBlob = BLOB.createTemporary(oracleConnection, true, BLOB.DURATION_SESSION);
tempBlob.open(BLOB.MODE_READWRITE);
OutputStream tempBlobWriter = tempBlob.getBinaryOutputStream();// setBinaryStream(1);
tempBlobWriter.write((byte[]) value);
tempBlobWriter.flush();
tempBlobWriter.close();
tempBlob.close();
st.setBlob(index, tempBlob);
} else {
st.setBlob(index, BLOB.empty_lob());
} catch (Exception exp) {
if (tempBlob != null) {
tempBlob.freeTemporary();
exp.printStackTrace();
st.setBlob(index, BLOB.empty_lob());
// throw new RuntimeException();
} finally {
if (wc != null) {
wc.close();
public Object nullSafeGet(ResultSet rs, String[] names, Object owner) throws HibernateException, SQLException {
final Blob blob = rs.getBlob(names[0]);
return blob != null ? blob.getBytes(1, (int) blob.length()) : null;
public Object deepCopy(Object value) {
if (value == null)
return null;
byte[] bytes = (byte[]) value;
byte[] result = new byte[bytes.length];
System.arraycopy(bytes, 0, result, 0, bytes.length);
return result;
public boolean isMutable() {
return true;
public Object assemble(Serializable arg0, Object arg1) throws HibernateException {
return assemble(arg0, arg1);
public Serializable disassemble(Object arg0) throws HibernateException {
return disassemble(arg0);
public int hashCode(Object arg0) throws HibernateException {
return hashCode();
public Object replace(Object arg0, Object arg1, Object arg2) throws HibernateException {
return replace(arg0, arg1, arg2);
=================================================================
can anyone give me the source code for this BinaryBlobType.java according to mysql blob handling ..

Moderator action: crosspost deleted.

MySQL advantages with Java server

Similar Messages

Maybe you are looking for