一个连接池的例子（来自JIVE）（1）

//文件：DbConnectionDefaultPool.java的第一部分
//请注意看里面注明的一处需要修改连接参数的地方
package com.qingtuo.db.pool;
import java.sql.*;
import java.util.*;
import java.io.*;
import java.text.*;
import java.util.Date;
/**
* Default Jive connection provider. It uses the excellent connection pool
* available from http://www.javaexcha*nge.c**om. This connection provider is a
* a good choice unless you can use a container-managed one.
*/
public class DbConnectionDefaultPool extends DbConnectionProvider {
private static final String NAME = "Default Connection Pool";
private static final String DESCRIPTION = "The default connection provider "
+ "that uses the connection pool from javaexchange.com. It works with "
+ "almost any database setup, is customizable, and offers good performance. "
+ "Use this connection provider unless you have your own or can use a "
+ "container managed connection pool.";
private static final String AUTHOR = "CoolServlets.com";
private static final int MAJOR_VERSION = 1;
private static final int MINOR_VERSION = 0;
private static final boolean POOLED = true;
private ConnectionPool connectionPool = null;
private Properties props;
private Properties propDescriptions;
private Object initLock = new Object();
public DbConnectionDefaultPool() {
//this.manager = manager;