 | | | Subject: problem to solve classpath | Subject: problem to solve classpath 2007-11-09 - By Michel Maria-Sube
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Hello,
I'm working under UNIX Suse 10.2 and using version
3.1.14 of jdbc; my application is apparently unable to
find path of classes defined in the jdbc archive. At
the beginning, application try to load driver class as
follows:
import javax.swing.*;
import java.lang.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.io.*;
import java.util.Vector;
...
public class <the_main_class> {
....
public void connectDB( String DBName, String user,
String passwd )
{
...
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (ClassNotFoundException cnfe) {
System.out.println("\nClassNotFoundException
occured");
System.out.println("connection with the DB is not
possible");
System.exit(ERROR);
}
.....
} //end of method
....
public static void main( String args[] ) {
........
}
} //end of main class
at execution, piece of code defined in the method
corpse:
Class.forName("com.mysql.jdbc.Driver").newInstance();
create exception: ClassNotFoundException
Before compiling, I set CLASSPATH variable as:
export
CLASSPATH='/usr/share/jdbc/mysql-connector-java-3 (See http://ava-3.ora-code.com).1.14-bin.jar'
then I compile with standard command:
javac *.java
and create jar executable with command:
jar cvfm runme.jar ./META-INF/MANIFEST.MF *.class
The sole way i found to solve path of Driver class is
to put directly in the jar executable content of class
files, i.e to extract the com directory (under current
location) from jdbc archive and then update runme.jar
by doing:
jar uvf runme.jar com
but this solution is unacceptable; I precise too that
when I was working previously under another linux
distro (mandrake10) I didn't encounter this problem,
classes where found just by specifying classpath
value; this seems rather uncreadible even for me but
maybe have i forgot or uncorrectly set
something...well suggestions are welcome...Thank you
in advance
Michel
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