Java Mysql Connector

Question

Hi everyone,
I started to work on JDBC but i have a few questions about the mysql connector.
I downloaded the .zip file and unzipped it to my desktop. Now i have a .jar file , a few folders , a installation guide and a read me file. But i couldn't understand the exact installation.
First of all where do i have to place this files? In which directory? I have a mysql database installed. But only the guide say is "calling the class.forname() function!"
I have no idea , what to place inside the forname function and where to install the connector files!
If u could tell me step by step i'll be really appreciate. Thanks for your helps.
Waiting for your answers :)

Answer 1

Let's see...
C:\Java\AppServer\jdk\bin\javac.exe is "javac
1.5.0_06"
.... That's the complete Java EE 5 SDKNo, javac.exe is part of Java SE. You have to have it for Java EE, of course. This version should match that of java.exe. Why does it not?
C:\Java\bin\java.exe is java version "1.5.0_08"How is it that the versions of javac.exe and java.exe don't match? You're making a mess here.
c:\MySQL50\bin\mysqld.exe is Ver 5.0.22-community
for Win32 on ia32 (MySQL Community Edition (GPL))Very good. Can you connect to MySQL using its client?
I've got copies of mysql-connector-java-5.0.3-bin.jar
all over the shop including:This is wrong. Don't have them "all over the shop".
C:\Java\lib\mysql-connector-java-3.1.13Wrong. Remove it.
C:\Program Files\Java\jre1.5.0_08\lib\ext //how the
flock did that get there?Didn't you say that you put it there? Wrong. Remove it.
C:\Program Files\Apache\Tomcat5.5\common\libCorrect. Leave it there.
C:\Program Files\Apache\Tomcat5.5\shared\libWrong. Remove it.
C:\Program
Files\Apache\Tomcat5.5\webapps\krc\WEB-INF\libPossibly wrong. Remove it.
You should have that JAR in one place from the point of view of your web context.
My system settings look like thisMicrosoft
Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\Keith>echo %PATH%
C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbe
m;C:\MSSQL\BINN;C:\MySQL50\bin;C:\Program
Files\QuickTime\QTSystem\;C:\Program
Files\Apache\ant-1.6.5\bin;C:\Program
Files\GNU\cvsnt;C:\Program Files\Microsoft SQL
Server\90\Tools\binn\;C:\java\bin;C:\java\apps
rver\bin;C:\java\appserver\jdk\bin;c:\program
files\devstudio\sharedide\bin\ide;c:\program
files\devstudio\sharedide\bin;c:\program
files\devstudio\visualc\bin;
C:\Documents and Settings\Keith>echo %CLASSPATH%
.;C:\Java\lib\;C:\Java\lib\ext\QTJava.zip;C:\Java\hsql
db\lib;C:\Java\lib\jakarta-oro-2.0.8\jakarta-oro-2.0.8
.jarTomcat ignores that CLASSPATH. It does you no good at all. I don't have a system CLASSPATH on any machine I use.
C:\Documents and Settings\Keith>echo %CATALINA_HOME%
C:\Program Files\Apache\Tomcat5.5Fine. Might be good to put in in quotes, because that space between Program and Files might be problematic. Save for all other paths with spaces in them.
C:\Documents and Settings\Keith>echo %JAVA_HOME%
C:\Java\AppServer\jdk
Notice that Connector/J is not in my class
path.Notice that Tomcat doesn't care.
my code is the same as yours above except for
formatting, better exception messages, and the
username and password are different, which are case
sensitive BTW.import java.sql.*;
public class Connector {
     public static void main (String[] args) {
          Connection conn = null;
          try {
               String userName = "keith";
               String password = "**********";
               String url = "jdbc:mysql://localhost/test";
Class.forName
ame ("com.mysql.jdbc.Driver").newInstance ();
conn = DriverManager.getConnection (url, userName,
me, password);
System.out.println ("Database connection
ion established");
          } catch (Exception e) {
               System.err.println ("getConnection: " + e);
          } finally {
               if (conn != null) {
                    try {
                         conn.close ();
System.out.println ("Database connection
ction terminated");
                    } catch (Exception e) {
                         /* ignore close errors */
}hope this helps... Keith.
corlettk: oh yeah.. and mysqld is installed as a
service, which is running. tomcat isn't running, it's
not required for this test.If you run this test on the command line, you'd better be using the -classpath option to tell the JVM where to find the MySQL connector JAR. The JVM ignores your system CLASSPATH, too.
%