Socket通信1.0

Socket通信1.0

服务器端：

	package page;

	import java.io.BufferedReader;
	import java.io.IOException;
	import java.io.InputStreamReader;
	import java.io.PrintStream;
	import java.net.ServerSocket;
	import java.net.Socket;
	import java.net.UnknownHostException;

	public class Server {

 	public static void main(String[] args) throws UnknownHostException {
	  Socket socket = null;
	  ServerSocket serverSocket=null;
	  try {
	   while(true){
		serverSocket= new ServerSocket(4242);//创建绑定端口8000的对象ServerSocket
	    System.out.println("服务器已经启动");
	    socket = serverSocket.accept();//接收客户端请求，得到Socket
	    System.out.println("有客户端连接过来了");
	    BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));//创建带缓冲的字符读入流
	    String sr = br.readLine();//读取一个文本行
	    PrintStream ps = new  PrintStream(socket.getOutputStream());//此输出流不会抛出异常
	    ps.println(new StringBuffer(sr).reverse());//将反转后的字符串打印到客户端屏幕上
	   }

	  } catch (IOException e) {
	   e.printStackTrace();
	  }finally{
	   try {
	   if(socket != null)
	     socket.close();
	   if(serverSocket != null)
		   serverSocket.close();
	    } catch (IOException e) {
	     e.printStackTrace();
	   }
	  }
	 }

	}

客户端：

	package page;

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

	public class Client {

 	public static void main(String[] args){
	  Socket socket = null;
	  try {
	   socket = new Socket("localhost",4242);//创建Socket, 请求服务端
	   System.out.println("客户端已经连接上");
	   while(true){
	    BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
	    PrintStream ps = new PrintStream(socket.getOutputStream());
	    Scanner scanner = new Scanner(System.in);   // 创建Scanner
	    System.out.println("请输入一个字符串6:");    // 给出提示输入
	    String line = scanner.nextLine();     // 从键盘输入读取一行
	    ps.println(line);//发送到服务端
	    ps.flush();
	    if((socket.getInputStream().available())==0)
	    System.out.println(br.readLine());// 读取服务端发回的字符串, 打印
 	   }
	  } catch (Exception e){
	   e.printStackTrace();
	  }finally{
	   if(socket != null){
	    try {
	     socket.close();
	    } catch (IOException e) {
	     e.printStackTrace();
	    }
	   }
	  }
	 }
	}