Re: JDBC Connectivity..

Hi,

20Jun2005 @ 11:58 Minal thusly spake
> I am noting down the steps..which I performed during installation and
> for using JDBC....
> 1. DO we have to use ./configure with-java ?
> because when I use that I get error that it failed. Is this the reason I
> am not able to eshtablish the connectivity...
> In  O'reily book it is mentioned that we have to build the driver...How
> does one do that??
> I have copied the postgresql driver in /usr/local/tomcat/common/lib
> directory..
> also set the class path...restarted the tomcat and used the java file as
> shown below...

java can't find the driver,
what postgresql driver are you using, should be a jar file,
do a listing of the jar file to see if Driver is in there,
'jar -tvf jarfile'

I'm using postgresql-8.0-310.jdbc3.jar

hth,

Luke
>
> public class Example1
> >>>{
> >>>public static void main(String[] argv)
> >>>{
> >>>    System.out.println("Checking if Driver is registerd");
> >>>    try
> >>>    {
> >>>    Class.forName("org.postgresql.Driver");
> >>>    }
> >>>    catch(ClassNotFoundException cnfe)
> >>>    {
> >>>    System.out.println("Couldn't find the Driver");
> >>>    cnfe.printStackTrace();
> >>>    System.exit(1);
> >>>    }
> >>>    System.out.println("registered the Driver OK, so lets make a
> >>>connection");
> >>>    Connection c = null;
> >>>
> >>>    try
> >>>    {
> >>>    c=
> >>>DriverManager.getConnection("jdbc:postgresql://localhost/trainneedcorp","postgres","admin");
> >>>    }
> >>>    catch(SQLException se)
> >>>    {
> >>>    System.out.println("Couldnt connect");
> >>>    se.printStackTrace();
> >>>    System.exit(1);
> >>>    }
> >>>    if(c != null)
> >>>    System.out.println("WE CONNECTED");
> >>>    else
> >>>    System.out.println("Reaching here is not done");
> >>>    }
> >>>    }
>
> >>>    I get the following error:
> >>>
> >>>java.lang.ClassNotFoundException: org.postgresql.Driver
> >>>        at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
> >>>        at java.security.AccessController.doPrivileged(Native Method)
> >>>        at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
> >>>        at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
> >>>        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
> >>>        at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
> >>>        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
> >>>        at java.lang.Class.forName0(Native Method)
> >>>        at java.lang.Class.forName(Class.java
>
> Am I going wrong anywhere??
>
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