How to get a db connection from jdevelopers created db connections

Question

How can you use the connection you create with jdevelopers wizard, to execute a simple preparedStatement in a custom class?
After use, how do you return/disconnect it?
con = ??
stmn = con.prepareStatement("SELECT first_name "+
"FROM customers "+
"WHERE cust_id = ? ");
stmn.setInt(1, custId);
ResultSet res = stmn.executeQuery();
Thank You

Answer 1

A connection OracleDBConnection in Connections-Navigator is available as a data source jdbc/OracleDBConnectionDS. To obtain a connection from the data source, add a resource-ref element to the web application in which a connection is to be obtained. In a Servlet or JSP application a connection may be obtained with the data source JNDI.
InitialContext initialContext = new InitialContext();
javax.sql.DataSource ds = (javax.sql.DataSource)
initialContext.lookup("java:comp/env/jdbc/OracleDBConnectionDS");
java.sql.Connection conn = ds.getConnection();