【java】：java socket编程实现服务器端和客户端

你的名字 2022-09-21 13:02 280阅读 0赞

先说功能：  
客户端给服务器端发送i变量，然后服务器端给客户端发送 i哈哈哈，我以此作为区分

服务器端：

import java.io.DataInputStream;
    import java.io.DataOutputStream;
    import java.io.IOException;
    import java.net.ServerSocket;
    import java.net.Socket;
    
    public class ServerSocketDemo {
        public static void main(String[] args){
            try {
                ServerSocket serversocket = new ServerSocket(2000);
                Socket clientsocket = null;
                String str = null;
                DataOutputStream out = null;
                DataInputStream in = null;
                System.out.println("服务器套接字连接成功");
                while(true){
                    System.out.println("等待与客户机的连接");
                    clientsocket = serversocket.accept();
                    System.out.println("与客户机连接成功");
                    in = new DataInputStream(clientsocket.getInputStream()); //获得输入刘
                    out = new DataOutputStream(clientsocket.getOutputStream());
                    while(true){
                        str = in.readUTF();      //把客户端传来的字收取
                        System.out.println("服务器收到 "+ str);
                        str += "哈哈哈";   //传给客户端的多了哈哈哈
                        out.writeUTF(str);  
                    // Thread.sleep(1000);
                    }
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

客户端：

import java.io.DataInputStream;
    import java.io.DataOutputStream;
    import java.io.IOException;
    import java.net.Socket;
    import java.net.UnknownHostException;
    
    public class socket {
        public static void main(String[] args){
            String str = null;
            Socket clientsocket;
            DataInputStream in;
            DataOutputStream out;
            try {
                clientsocket  = new Socket("127.0.0.1",2000);
                in = new DataInputStream(clientsocket.getInputStream());
                out = new DataOutputStream(clientsocket.getOutputStream());
                out.writeUTF("我是客户机");
                int i = 0;
                while(true){
                    str = in.readUTF();
                    out.writeUTF(i++ +"");
                    System.out.println("客户端收到 "+str);
                    Thread.sleep(1000);
                }
            } catch (UnknownHostException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }