实验七网络编程1．实验目的（1）掌握Socket通信。（2）掌握UDP通信2．实验内容实验题1利用Socket类和ServerSocket类编写一个C/S程序，实现C/S通信。客户端向服务器端发送Time命令，服务器端接受到该字符串后将服务器端当前时间返回给客户端；客户端向服务器端发送Exit命令，服务器端向客户端返回“Bye”后退出。[基本要求]编写完整程序。服务器端：packageedu.cn.jp;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStreamReader;importjava.io.PrintWriter;importjava.net.ServerSocket;importjava.net.Socket;publicclassMessageServer{publicstaticvoidmain(String[]args){try{ServerSocketserver=newServerSocket(3000);Socketclient=server.accept();//启动倾听，等待客户端BufferedReaderin=newBufferedReader(newInputStreamReader(client.getInputStream()));//输入流对象PrintWriterout=newPrintWriter(client.getOutputStream());//输出流对象BufferedReaderuserin=newBufferedReader(newInputStreamReader(System.in));//实现键盘输入//启动接受和发送线程newsendThread(out,userin,server).start();newreciveThread(in).start();}catch(IOExceptione){e.printStackTrace();}}}packageedu.cn.jp;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.PrintWriter;importjava.net.ServerSocket;importjava.net.Socket;publicclassreciveThreadextendsThread{BufferedReaderin;//服务器端接受线程publicreciveThread(BufferedReaderin){this.in=in;}@Overridepublicvoidrun(){try{while(true){Stringinfo=in.readLine();//获取信息if(info.equals("exit")){break;}while(info!=null){System.out.println(info);info=in.readLine();if(info.equals("exit")){System.out.println(info);break;}}break;}}catch(IOExceptione){e.printStackTrace();}}}packageedu.cn.jp;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.PrintWriter;importjava.net.ServerSocket;importjava.net.Socket;importjava.text.SimpleDateFormat;importjava.util.Date;publicclasssendThreadextendsThread{PrintWriterout;BufferedReaderuserin;ServerSocketserver;publicsendThread(PrintWriterout,BufferedReaderuserin,ServerSocketserver){this.out=out;this.userin=userin;t