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datasource for mysql

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I m using struts1.2.9, tomcat 6 and mysql. I m trying to establish connection pooling and have done the following

in META-INF/context.xml

<Context path="" reloadable="false">
<Resource driverClassName="com.mysql.jdbc.Driver" maxActive="40" maxIdle="5" maxWait="5000" minEvictableIdleTimeMillis="30000" name="jdbc/mydB" password="root123" testOnBorrow="true" testWhileIdle="true" type="javax.sql.DataSource" url="jdbc:mysql://localhost:3306/test?autoReconnect=true&zeroDateTimeBehavior=convertToNull" username="root"/>

wrote a java class

when i try to open db connection i m getting null pointer exception.. What else needs to be configured to get this working. any ideas are welcome.

Thank you
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I am not sure where in you code you are getting the NPE.
But the code below looks wrong, probably you can correct it and check .

Line 1 seems wrong and will fetch the resource that is DataSource and not the Context.
Instead you should just have something like

Where datasource string can be JNDI Name of the datasource. In your case "java:comp/env/jdbc/mydB".

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