Java Socket实现简易聊天室

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Server1 {

 static public List<Client> list = new ArrayList<Client>();

 static ExecutorService cachedThreadPool = Executors.newCachedThreadPool();

 public static void main(String[] args) {
  //创建一个ServerSocket监听端口
  try (ServerSocket server = new ServerSocket(5678)) {

   while (true) {     // 利用死循环不停的监听端口

    Socket s = server.accept();// 利用Socket服务器的accept()方法获取客户端Socket对象。
    addClient(s);

   }

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

 // 添加客户端
 private static void addClient(Socket s) {
  String name;

  try {
   BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
   name = in.readLine();
   Client c = new Client(name, s);// 创建客户端处理线程对象
   System.out.println(name);
   list.add(c);

   cachedThreadPool.execute(c);

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

 static class Client implements Runnable {

  String name;  // 客户端名字
  Socket s = null; // 保存客户端Socket对象

  BufferedReader in;
  PrintWriter out;

  Client(String name, Socket s) {

   this.s = s;
   this.name = name;

   try {
    in = new BufferedReader(new InputStreamReader(s.getInputStream()));
    out = new PrintWriter(s.getOutputStream());
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }

  @Override
  public void run() {
   try {
    while (true) {
     String str = in.readLine();
     for (int j = 0; j < list.size(); j++) {
      Server1.Client c = list.get(j);
      if (c != this) {
       System.out.println(str);
       c.send(str+"-|1|2|-"+name);
      }
     }

     if (str.equals("end"))
      break;
    }

    try {
     s.close();
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   } catch (IOException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
   }
  }

  public void send(String str) throws IOException {
   out.println(str);
   out.flush();
  }
 }
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

public class Client1 {
 public static String name = null;
 static Socket socket = null;

 static BufferedReader in;
 static PrintWriter out;

 public static void main(String[] args) {
  Scanner sc = new Scanner(System.in);

  System.out.print("输入用户名:>");
  name = sc.nextLine();

  try {
//   socket = new Socket("116.62.173.212", 5678);
   socket = new Socket("127.0.0.1", 5678);

   System.out.println(socket);

   System.out.println("已连接服务器>");

   out = new PrintWriter(socket.getOutputStream());
   in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

   Thread receive = new Thread(new receiveThread());
   receive.start();

   out.println(name);
   out.flush();

   String msg;

   while (true) {
//    System.out.print("你说:>");
    msg = sc.nextLine();

    out.println(msg);
    out.flush();

    if (msg.equalsIgnoreCase("end"))
     break;
   }

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

 static class receiveThread implements Runnable{

  @Override
  public void run() {
   try {
    while (socket!=null) {

     String str = in.readLine();
     String message = str.split("-\\|1\\|2\\|-")[0];
     String name = str.split("-\\|1\\|2\\|-")[1];
     System.out.println(name + ":>" + message);

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