数据库连接池Java实现小结
http://tech.ddvip.com 2006年11月25日 社区交流
本文详细介绍数据库连接池Java实现小结
/*
* Created on 2003-5-13
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package scut.ailab.connectionpool;
/**
* @author youyongming
*
*/
import java.sql.*;
public class testmypool {
public void test1()
{
String user = "DevTeam";
String password = "DevTeam";
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
String url = "jdbc:odbc:gfqh2";
ConnectionParam param = new ConnectionParam(driver,url,user,password);
ConnectionFactory cf = null;//new ConnectionFactory(param, new FactoryParam());
try{
cf = new ConnectionFactory(param,new FactoryParam());
Connection conn1 = cf.getFreeConnection();
Connection conn2 = cf.getFreeConnection();
Connection conn3 = cf.getFreeConnection();
Statement stmt = conn1.createStatement();
ResultSet rs = stmt.executeQuery("select * from requests");
if (rs.next())
{
System.out.println("conn1 y");
}
else
{
System.out.println("conn1 n");
}
stmt.close();
conn1.close();
Connection conn4 = cf.getFreeConnection();
Connection conn5 = cf.getFreeConnection();
stmt = conn5.createStatement();
rs = stmt.executeQuery("select * from requests");
if (rs.next())
{
System.out.println("conn5 y");
}
else
{
System.out.println("conn5 n");
}
conn2.close();
conn3.close();
conn4.close();
conn5.close();
}
catch(Exception e)
{
e.printStackTrace();
}
finally{
try{
cf.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
public static void main(String[] args) {
String user = "DevTeam";
String password = "DevTeam";
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
String url = "jdbc:odbc:gfqh2";
ConnectionParam param = new ConnectionParam(driver,url,user,password);
ConnectionFactory cf = null;//new ConnectionFactory(param,new FactoryParam());
try{
cf = new ConnectionFactory(param,new FactoryParam());
ConnectionFactory cf1= new ConnectionFactory(param,new FactoryParam());
Connection conn1 = null;
long time = System.currentTimeMillis();
for (int i=0; i <10;i++)
{
conn1 = cf.getFreeConnection();
Statement stmt = conn1.createStatement();
ResultSet rs = stmt.executeQuery("select * from requests");
if (rs.next())
{
System.out.println("conn1 y");
}
else
{
System.out.println("conn1 n");
}
conn1.close();
}
System.out.println("pool:" + (System.currentTimeMillis()-time));
time = System.currentTimeMillis();
Class.forName(param.getDriver()).newInstance();
for (int i=0; i <10;i++)
{
conn1 = DriverManager.getConnection(param.getUrl(),
param.getUser(), param.getPassword());
Statement stmt = conn1.createStatement();
ResultSet rs = stmt.executeQuery("select * from requests");
if (rs.next())
{
System.out.println("conn1 y");
}
else
{
System.out.println("conn1 n");
}
conn1.close();
}
System.out.println("no pool:" + (System.currentTimeMillis()-time));
}
catch(Exception e)
{
e.printStackTrace();
}
finally{
try{
cf.close();
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
}
责编：豆豆技术应用
正在加载评论...