一对多应答服务

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
/**
 * 定义消息处理线程
 */
class Msg extends Thread {
    private Socket socket;
    public Msg(Socket socket){
        this.socket=socket;
    }
    @Override
    public void run() {
        this.msg();
    }
    private void msg(){
        BufferedReader bufferedReader = null;
        PrintWriter printWriter = null;
        try{
            bufferedReader= new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
            printWriter= new PrintWriter(this.socket.getOutputStream());
            while(true){
                printWriter.println(bufferedReader.readLine()+" [ok]");
                printWriter.flush();
            }
        }catch (Exception e){
            try {
                System.out.println(this.socket.getInputStream()+"断线了");
            } catch (IOException ex) {
                ex.printStackTrace();
            }finally {
                if(bufferedReader!=null){
                    try {
                        bufferedReader.close();
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                }
                if(printWriter!=null){
                    printWriter.close();
                }
            }
        }
    }
}
public class EchoServer {
    public static void main(String[] args) {
        ServerSocket serverSocket = null;
        try{
            System.out.println("服务器启动，开始监听。。。。");
            serverSocket= new ServerSocket(8888);
            while(true){
                Socket socket = serverSocket.accept();
                new Msg(socket).start();
                System.out.println("连接成功！！");
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(serverSocket!=null){
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}