c/s网络编程

网络编程：

功能：

　　实现客户端和服务器之间的通信，客户端先发送消息，然后服务器接收后再发送一条消息，然后客户端接收再发一条，当客户端输入“Bye”时候结束通信

Server.java如下所示：

package bag1;

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.Scanner;

public class Server {

    public static void main(String[] args) throws IOException {
        Socket s = null;
        Scanner sc = new Scanner(System.in);
        ServerSocket ss = new ServerSocket(8080);
        String str = null;
        s = ss.accept();
        System.out.println("链接成功！！");
        BufferedReader is = new BufferedReader(new InputStreamReader(s.getInputStream()));
        PrintWriter os = new PrintWriter(s.getOutputStream(), true);
        
        while(true){    
            str = is.readLine();
            System.out.println("Client:" + str);
            if(str.equals("Bye")){
                s.close();
                break;
            }
            str = sc.nextLine();
            os.println(str);
        }
    }
}

Client.java如下所示：

package bag1;

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

public class Client {

    public static void main(String[] args) throws IOException {
        Socket s = new Socket();
        Scanner sc = new Scanner(System.in);
        String str = null;
        s.bind(null);     // 随机指定端口
        SocketAddress ra = new InetSocketAddress("localhost", 8080);
        s.connect(ra, 60000);
        BufferedReader is = new BufferedReader(new InputStreamReader(s.getInputStream()));
        PrintWriter os = new PrintWriter(s.getOutputStream(),true);
        str = sc.nextLine();
        while(true){
            os.println(str);
            str = is.readLine();
            if(str.equals("Bye")){
                s.close();
            }
            //System.out.println("读取服务器端成功！！");
            System.out.println("Server:" + str);
            str = sc.nextLine();
            
        }
    }

}