We can implement connection pooling in weblogic as follows.
1. OPen weblogic console.on the top right hand side corner 
of the window click on services tab.
2.Expand it and select JDBC.
3.Create a connection pool
4.Create a DataSource.
5.Create a JNDI.

In the programs make use of the following code to get the 
connection from ConnectionPool

Context ic=null;
DataSource ds;
Connection con=null;
Hashtable ht=new Hashtable();
ht.put
(Context.INITIAL_CONTEXT_FACTORY,"Weblogic.jndi.WLInitialCon
textFactory");
ht.put(Context.PROVIDER_URL,"t3://localhost:7001");
ic=new InitialContext(ht);
ds=(DataSource)ic.lookup("jndi name given in weblogic");
con=ds.getConnection();