[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[cobalt-developers] problem with mm.mysql jdbc driver



I have jdk installed on my RAQ3.

I have read on this list about the mm.mysql driver. I downloaded the jar file, placed it in the /usr/jakarta-tomcat/lib directory. I then restarted tomcat. (I have also restarted httpd on subsequent attempts) As a jar file, I thought this would be enough. I did not receive any error messages upon restarting, and the jar file showed up in the start-up message. However, I get error messages when trying to use jdbc. I have read in some posts that you need to add the jar file to the classpath. I did this using the export command, yet still have the same problem. (even if it did work, I don't know how to make the classpath change permanent since the changes drop off when you log off.)

I have copied below both the jsp page source, and the main part of the error message when viewing it. I hope someone can help. I know others have had similar problems, but I can't find much in the way of a solution.

-------
jsp script
---------

<html>
<head>
</head>
<%@ page language="java" import="java.sql.*" %>
<body>
<%
 Class.forName("org.gjt.mm.mysql.Driver");


// change this as per your requirements
 Connection myConn =
DriverManager.getConnection("jdbc:mysql://localhost/members?user=member&password=testpassword");

 Statement stmt = myConn.createStatement();


 String query = "select * from members";

 ResultSet myResultSet = stmt.executeQuery(query);

 if (myResultSet != null) {
   while (myResultSet.next()) {
     // specify the field name
     String name = myResultSet.getString("name");

%>
<%= name %>
<br>
<%
   }
 }

 stmt.close();

 myConn.close();
%>
</body>
</html>

------------
error message in browser
------------

Root cause:

java.lang.ClassNotFoundException: Unable to load class org.gjt.mm.mysql.Driver at org.apache.jasper.servlet.JasperLoader.findClass(JasperLoader.java:223) at org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:147)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
       at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)
       at java.lang.Class.forName0(Native Method)
       at java.lang.Class.forName(Class.java:120)
at _0002fjdbctest_0002ejspjdbctest_jsp_0._jspService(_0002fjdbctest_0002ejspjdbctest_jsp_0.java:64) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
       at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
       at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372) at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:812) at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758) at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:166) at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416) at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
       at java.lang.Thread.run(Thread.java:484)



_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp.