用于模拟并发多用户多线程测试

最新推荐文章于 2024-05-29 22:35:15 发布

haiking5253

最新推荐文章于 2024-05-29 22:35:15 发布

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本文介绍了一个使用Java实现的并发控制示例，通过Semaphore限制并发数，并演示了如何在多线程环境下安全地进行数据库操作。

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package com;

import java.util.Map;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

import com.yt.util.WIFICommonUtil;
import com.yt.wifi.util.Jdbc;

/**
*aa.java
*com
*工程：wifilogin
*功能：TODO
*author date time
*李星星 2014-4-10 下午1:07:08
*Email:hai5253@163.com
*copytight (C) 2014 ,INI All Rights Reserved.
*/
public class aa {

   private static int thread_num = 300;
    private static int client_num = 1000;

    public static void main(String[] args) {
        ExecutorService exec = Executors.newCachedThreadPool();

        final Semaphore semp = new Semaphore(thread_num);

        for (int index = 0; index < client_num; index++) {

            final int NO = index;

            Runnable run = new Runnable() {
                public void run() {
                    try {
                        semp.acquire(); //获取
                        System.out.println("Thread:" + NO);
                        //业务逻辑
                        WIFICommonUtil util = new WIFICommonUtil();
                       Map<String,Object> info = WIFICommonUtil.getUsernameAndPassword("123ssdd"+NO, "a", "aa", "aa", "bb", "aA");
                       Jdbc.execute("INSERT into user_test(username,phone) VALUES('"+info.get("username")+"','1236454"+NO+"')");
                        semp.release(); //释放
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            };
            exec.execute(run);
        }
        exec.shutdown();
    }

}