Java EE (Java Enterprise Edition) General Discussion

Hello Everyone. I've developed a JSP application from the Wrox JSP Web development book. I've created a Database Connection Pool Servlet file. When I try to compile this file, I get the following error:

com\wrox\tourism\db\util\ConnectionPool.java:5: cannot resolve symbol
symbol : class DataSource
location: package sql
import javax.sql.DataSource;
^
com\wrox\tourism\db\util\ConnectionPool.java:9: cannot resolve symbol
symbol : class DataSource
location: class com.wrox.tourism.db.util.ConnectionPool
private DataSource ds;
^
com\wrox\tourism\db\util\ConnectionPool.java:13: cannot resolve symbol
symbol : class DataSource
location: class com.wrox.tourism.db.util.ConnectionPool
private ConnectionPool(DataSource ds) {
^
com\wrox\tourism\db\util\ConnectionPool.java:17: cannot resolve symbol
symbol : class DataSource
location: class com.wrox.tourism.db.util.ConnectionPool
public static void init(DataSource ds) {

The Connection Pool file is as follows:

package com.wrox.tourism.db.util;

import java.sql.SQLException;
import java.sql.Connection;
import javax.sql.DataSource;

public class ConnectionPool {

private DataSource ds;

private static ConnectionPool mySelf;

private ConnectionPool(DataSource ds) {
this.ds = ds;
}

public static void init(DataSource ds) {
mySelf = new ConnectionPool(ds);
}

public static ConnectionPool getInstance() {

if (mySelf == null) {
throw new IllegalStateException("Pool not initialized.");
}
return mySelf;

}

public Connection getConnection() throws SQLException {
return ds.getConnection();
}

}

Could anyone help me out as I'm completely lost!!!

Much appreciated,
Assad