java.lang.ClassNotFoundException: com.mysql.jdbc.Driver when executing JAR

Question

I am attempting to connect to my local MySQL server with the following code:

dbURL = \"jdbc:mysql://localhost:3306:/\" + dbname;
try{
    Class.forName(\"com         


        

Answer 1

No matter where it's compiled, it will run smoothly in the same JVM implementation.

All you have to do is to properly include a JDBC driver connector in your classpath. Try putting mysql-connector-java.jar into the same directory with your program.

If you unzip this jar file, does it contain com/mysql/jdbc/Driver.class? If not, try to download jdbc driver implementation from the mysql web-site.

Answer 2

Install MySQL connector for JAVA

sudo apt-get install libmysql-java

Set classpath

export CLASSPATH=$CLASSPATH:/usr/share/java/mysql-connector-java.jar

Source: http://marksman.wordpress.com/2009/03/01/setting-up-mysqljdbc-driver-on-ubuntu/

Answer 3

In case of JARs, the -cp and -classpath arguments and the %CLASSPATH% environment variable are ignored. Instead, the classpath has to be specified in the Class-Path entry of JAR's own /META-INF/MANIFEST.MF file. It can be a path relative to the JAR itself. E.g. in the same folder or in a /lib subfolder.

The below example assumes the driver to be in the same folder as the JAR.

Class-Path: mysql-connector-java.jar

(make sure that the MANIFEST.MF file has a blank line at the end)

See also:

• Using JAR files - The Basics - Understanding the MANIFEST.MF
• Eclipse: Package multiple projects into one JAR
• Java Manifest file's class path and how it determines relative dirs