求一个数据库连接池，高分相送

[snap_bug]

那位有比较好一点的已经实现的数据库连接池给俺一个，感激不尽！！

邮件：[e-mail]

[mx1029]

用Tomcat自己带的连接池。很好用的。
去网上查一下。有很多介绍的。。。

[阿古]

用应用服务器自带的不是很好么！

[Philzzf]

http://www.google.com/search?q=java+%CA%FD%BE%DD%BF%E2+%C1%AC%BD%D3%B3%D8&hl=zh-CN&lr=lang_zh-CN&ie=gb2312

[北极猩猩]

Apache commons-dbcp啊

[orion11]

我已发送了一个给你了

[snap_bug]

to all:
首先多谢各位的指点。
我的程序和应用服务器没有关系，自己写的连接池方便管理，而且以后可以用在任何地方。

to orion11:
我已经收到你的程序，在看，谢谢。

[jt80]

楼主，能否我发一份，谢谢了!
[e-mail]

[angel7532]

楼主，也给我发一份好吗？再次感谢

[angel7532]

[e-mail]

[wangdaobang]

楼主,给我一份,[e-mail], Thanks a lot

[nighthawk]

package hall;

import java.util.HashMap;
import java.util.Vector;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.*;

/**
* <p>Title: </p>
* <p>Description: test</p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: </p>
* @author xww
*/

public class ConnectionPool {

//连接池的管理器,首先初始化，仅仅有一个对象，管理连接池
private static HashMap connectionPoolManager = new HashMap();
//没有用过的连接池，用vector实现同步
private static Vector noUseConnectionPool= new Vector();
//没有用过的连接池
private static HashMap nowUseConnectionPool = new HashMap();

private static String dbDriver = "oracle.jdbc.driver.OracleDriver";
private static String dbUrl = "jdbc:oracle:thin:@localhost:1521:db";
private static String userName = "xww";
private static String userPassword = "11111111";

//默认为100个连接池
private static int MAX_POOL = 100;

//singleTon 设计模式
private ConnectionPool(String driver, String url, String name,
String password, int max) throws
ClassNotFoundException {
Class.forName(driver);
dbUrl = url;
userName = name;
userPassword = password;
MAX_POOL = max;
}

public static ConnectionPool getConnManagerInstance(String poolName) throws
ClassNotFoundException {
ConnectionPool tempPool = (ConnectionPool) connectionPoolManager.get(
poolName);
if (tempPool == null) {
tempPool = new ConnectionPool(dbDriver, dbUrl, userName, userPassword,
MAX_POOL);
connectionPoolManager.put(poolName, tempPool);
return tempPool;
}
else {
return tempPool;
}
}

//通过连接池获得真正的链接
public static Connection getConnection() throws java.sql.SQLException {
Connection conn = null;
synchronized (noUseConnectionPool) {
if (noUseConnectionPool.size() > 0) {
conn = (Connection) noUseConnectionPool.firstElement();
noUseConnectionPool.remove(conn);
return conn;
}
}
//如果数据库连接池没有链接了，自己创建一个
if (conn == null) {
conn = createConnection(dbDriver, dbUrl, userName, userPassword);
}
else if (conn.isClosed()) {
nowUseConnectionPool.remove(conn);
conn = createConnection(dbDriver, dbUrl, userName, userPassword);
}
conn.setAutoCommit(false);
nowUseConnectionPool.put(conn, conn);
return conn;
}

//如果连接池没有链接了，就需要产生一个链接
private static Connection createConnection(String driver, String url,
String user, String password) throws
java.sql.SQLException {
Connection conn = DriverManager.getConnection(url, user, password);
return conn;
}

public static void releaseConnection(Connection conn, boolean isCommit) throws
java.sql.SQLException {
if (isCommit) {
conn.commit();
}
else {
conn.rollback();
}
nowUseConnectionPool.remove(conn);
if (noUseConnectionPool.size() + nowUseConnectionPool.size() < MAX_POOL) {
synchronized (noUseConnectionPool) {
noUseConnectionPool.add(conn);
}
}
else {
conn.close();
}
}

public static void main(String[] args) {
//测试模拟10个客户
for (int i = 0; i < 10; i++) {
try {
//xxxx 一般为属性文件读取
ConnectionPool pool = ConnectionPool.getConnManagerInstance("xxxx");
Connection conn = pool.getConnection();

}
catch (SQLException ex1) {
//处理异常
}
catch (ClassNotFoundException ex) {
//处理异常
}
}
}
}