多线程PING IP+端口号！（源码），附非多线程时间测试对比。。

闲来无事写一个多线程PING IP+端口号的demo，希望可以得到大家的指教，如有不足请指出，万分感谢！！！

package com.card.test;

import java.io.IOException;

import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MultithreadPingIp {

	private List> ipList; // 需验证的IP+端口集合
	private int threadNum = 0; // 线程数

	public MultithreadPingIp(List> ipList, int threadNum) {
		this.ipList = ipList;
		this.threadNum = threadNum;
	}

	public MultithreadPingIp() {

	}

	public void startPing() {
		// 创建一个线程池，多个线程同步执行
		final CountDownLatch cdAnswer = new CountDownLatch(threadNum);
		ExecutorService pool = Executors.newFixedThreadPool(threadNum);
		for (int i = 0; i < ipList.size(); i++) {
			pool.execute(new PingRunner(ipList.get(i), cdAnswer));
		}

		try {
			System.out.println("线程等待开始=" + cdAnswer.getCount());
			cdAnswer.await();
			System.out.println("线程等待结束=" + cdAnswer.getCount());
		} catch (InterruptedException e) {

		}

		pool.shutdown();
		try {
			while (!pool.isTerminated()) {
				Thread.sleep(100);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private class PingRunner implements Runnable {
		private String host = null;
		private int port = 0;
		private Map hostList; // 需验证的IP
		private CountDownLatch cdAnswer;

		public PingRunner(Map hostList, CountDownLatch cdAnswer) {
			this.hostList = hostList;
			this.cdAnswer = cdAnswer;
		}

		Socket s = new Socket();

		@Override
		public void run() {
			host = hostList.get("addr");
			port = Integer.valueOf(hostList.get("port"));
			SocketAddress add = new InetSocketAddress(host, port);
			try {
				s.connect(add, 3000);// 超时3秒
				System.out.println("IP:" + host + "正常");
			} catch (IOException e) {
				System.out.println("IP:" + host + "超时");
			} finally {
				try {
					s.close();
					cdAnswer.countDown();
				} catch (IOException e) {
					
				}
			}

		}

	}

	public static void main(String[] args) {
		long currentTime = System.currentTimeMillis();
		SimpleDateFormat formatter = new SimpleDateFormat("HH时mm分ss秒");
		Date date = new Date(currentTime);

		System.out.println("多线程测试：Ping开始时间：" + formatter.format(date));
		List> allIp = new ArrayList>();	
		Map m = new HashMap();
		Map m1 = new HashMap();
		Map m2 = new HashMap();
		Map m3 = new HashMap();
		Map m4 = new HashMap();
		Map m5 = new HashMap();
		m.put("addr", "192.168.1.1");
		m.put("port", "8080");
		m1.put("addr", "192.168.1.2");
		m1.put("port", "8080");
		m2.put("addr", "192.168.0.110");
		m2.put("port", "1521");
		m3.put("addr", "192.168.0.111");
		m3.put("port", "1521");
		m4.put("addr", "192.168.0.112");
		m4.put("port", "1521");
		m5.put("addr", "192.168.0.113");
		m5.put("port", "1521");
		allIp.add(m);
		allIp.add(m1);
		allIp.add(m2);
		allIp.add(m3);
		allIp.add(m4);
		allIp.add(m5);
		MultithreadPingIp batchPingIpThread = new MultithreadPingIp(allIp,allIp.size());
		//多线程测试PING IP+端口时间
		batchPingIpThread.startPing();
		
		//非多线程测试PING IP+端口时间
		//batchPingIpThread.ipConnec(allIp);

		long current = System.currentTimeMillis();
		Date end = new Date(current);
		System.out.println("多线程测试：Ping结束时间：" + formatter.format(end));

	}

	//非多线程实现
	public void ipConnec(List> list) {
		for (int i = 0; i < list.size(); i++) {
			Socket s = new Socket();
			String host = list.get(i).get("addr");
			int port = Integer.valueOf(list.get(i).get("port"));
			SocketAddress add = new InetSocketAddress(host, port);
			try {
				try {
					s.connect(add, 3000);// 超时3秒
					System.out.println("Ip:" + host + "正常！");
				} catch (IOException e) {
					System.out.println("Ip:" + host + "超时！");
				}
			} finally {
				try {
					s.close();
				} catch (IOException e) {

				}
			}
		}
	}

}

多线程测试结果：
    Ping开始时间：18时34分05秒
    线程等待开始=6
    IP:192.168.0.110正常
    IP:192.168.1.1超时
    IP:192.168.0.112超时
    IP:192.168.1.2超时
    IP:192.168.0.111超时
    IP:192.168.0.113超时
    线程等待结束=0
    Ping结束时间：18时34分08秒

    可以看出ping六个IP相差3秒时间

单线程测试结果：

   Ping开始时间：18时45分22秒
   Ip:192.168.1.1超时！
   Ip:192.168.1.2超时！
   Ip:192.168.0.110正常！
   Ip:192.168.0.111超时！
   Ip:192.168.0.112超时！
   Ip:192.168.0.113超时！
   Ping结束时间：18时45分33秒

   可以看出ping六个IP相差11秒时间