javase 一个服务器端对多个客户端的模型

思路：采用线程池来解决多个客户端请求，简单的设置线程数可以与CPU核数匹配，过多的线程数空闲会消耗服务器资源。

package com.Lx;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class MultiServer {
    public static void main(String[] args) throws IOException {
        //线程池中创建一个三线程的服务
        ExecutorService es = Executors.newFixedThreadPool(3);
        ServerSocket sever = new ServerSocket(111);
        System.out.println("服务器开始启动，等待连接。。。");
        while (true){
            Socket s = sever.accept();
            System.out.println(s.getInetAddress().getHostAddress());
            es.execute(new UserThread(s));
        }
    }
}
class UserThread implements Runnable{
    private Socket s;
    public UserThread(Socket s){
        this.s = s;
    }
    @Override
    public void run() {
        BufferedReader br = null;
        try {
            br = new BufferedReader(new InputStreamReader(s.getInputStream()));
            PrintStream ps = new PrintStream(new BufferedOutputStream(s.getOutputStream()));
            String info = br.readLine();
            System.out.println(info);
            ps.println("echo"+info);
            ps.flush();
            ps.close();
            br.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}