How do I use JNDI to get database connection or data source?

package org.kodejava.example.jndi;

import javax.naming.InitialContext;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class JNDITestServlet extends HttpServlet implements Servlet {

    protected void doGet(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {

        // This implementation of doGet method show us an example to use
        // conn obtained in the getConnection() method.
        DateFormat format = new SimpleDateFormat("dd/MM/yyyy");

        PrintWriter writer = res.getWriter();

        Connection conn = getConnection();
        if (conn != null) {
            try {
                // A query to get current date time from Oracle database
                String sql = "SELECT SYSDATE FROM DUAL";
                PreparedStatement statement = conn.prepareStatement(sql);
                ResultSet rs = statement.executeQuery();

                while ( {
                    Date date = rs.getDate("SYSDATE");
                    writer.println("The current date is " + format.format(date));
            } catch (SQLException e) {
            } finally {
                try {
                    if (!conn.isClosed()) {
                } catch (SQLException e) {

     * Get a database connection from the registered data source in the 
     * servlet container. To registered the JNDI data source you should 
     * refer to your servlet container documentation.
     * @return a database connection
    private Connection getConnection() {
        Connection connection = null;
        try {
            InitialContext context = new InitialContext();
            DataSource dataSource = (DataSource) context
            connection = dataSource.getConnection();
        } catch (Exception e) {
        return connection;

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.