<Resource name="jdbc/myoracle" auth="Container"
          type="javax.sql.DataSource" driverClassName="oracle.jdbc.OracleDriver"
          url="jdbc:oracle:thin:@INNOA6PC03070SZ.ptt.cti.com:1521:XE"
          username="loginname" password="password" maxActive="20" maxIdle="10"
          maxWait="-1"/>

Context initContext = new InitialContext();
        Context envContext = (Context) initContext.lookup("java:/comp/env");
        DataSource ds = (DataSource) envContext.lookup("jdbc/myoracle");
        conn = ds.getConnection();