网络编程--简单的客户端与服务端连接

package socket;

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 * Copyright (C), 2018-2021, Mr.Lin
 * Author: Mr.Lin
 * Date: 2021/12/1 21:46
 * FileName: SocketAPI01Client
 * Description: 客户端
 */
public class SocketAPI01Client {
    public static void main(String[] args) throws IOException {

        //连接本机的端口，如果连接成功则返回socket对象
        Socket socket = new Socket(InetAddress.getLocalHost(),6666);
        System.out.println("返回socket="+socket);
//连接上后通过socket.getOutputStream()得到和socket 对象关联的输出流对象
        OutputStream os = socket.getOutputStream();
        os.write("hello.server".getBytes());
        os.close();
        socket.close();
        System.out.println("客户端退出。。。。");

    }
}

package socket;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * Copyright (C), 2018-2021, Mr.Lin
 * Author: Mr.Lin
 * Date: 2021/12/1 21:38
 * FileName: SocketAPI01Server
 * Description:服务器端
 */
public class SocketAPI01Server {
    public static void main(String[] args) throws IOException {
        //在本机的6666端口监听，等待连接
        //要求在本机没有其他服务占用6666端口
        ServerSocket serverSocket = new ServerSocket(6666);
        System.out.println("端口6666等待连接。。。");
//当客户端连接则返回socket对象
        Socket socket = serverSocket.accept();
        System.out.println("对象已连接。。。");
//通过 socket.getInputStream()读取客户端写入到 数据通道的数据
        InputStream is = socket.getInputStream();
        //IO读取
        byte [] bytes=new byte[1024];
        int readLen=0;
        while ((readLen=is.read(bytes)) !=-1){
            System.out.println(new String(bytes,0,readLen));
        }
        is.close();
        socket.close();
        serverSocket.close();


    }
}