package com.witwicky.socket.basicsocket;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

public class Server {

    public static void main(String[] args) {

        int port = 43523;

        ServerSocket serverSocket = null;

        try {

            System.out.println("===\nstart recive message......");

            serverSocket = new ServerSocket(port);

            Socket socket = serverSocket.accept();

            InputStream inputStream = socket.getInputStream();

            StringBuffer sb = new StringBuffer();

            byte[] bytes = new byte[1024];

            int len;

            while ((len = inputStream.read(bytes)) != -1) {

                System.out.println("length: " + len);

                sb.append(new String(bytes, 0, len, "UTF-8"));

            }

            System.out.println(sb.toString());

            System.out.println("end recive message......\n===");

            String returnContent = "recive over.";

            OutputStream outputStream = socket.getOutputStream();

            outputStream.write(returnContent.getBytes("UTF-8"));

            outputStream.close();

            inputStream.close();

            socket.close();

            serverSocket.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

Connected to the target VM, address: '127.0.0.1:61818', transport: 'socket'

===

start recive message......

length: 180

因为《The C Programme Language》中使用它做为第一个演示程序，非常著名，所以后来的程序员在学习编程或进行设备调试时延续了这一习惯。

end recive message......

===

Disconnected from the target VM, address: '127.0.0.1:61818', transport: 'socket'

Process finished with exit code 0

package com.witwicky.socket.basicsocket;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.Socket;

public class Client {

    public static void main(String[] args) {

        String host = "127.0.0.1";

        int port = 43523;

        try {

            System.out.println("===");

            Socket socket = new Socket(host, port);

            OutputStream outputStream = socket.getOutputStream();

            String content = "因为《The C Programme Language》中使用它做为第一个演示程序，非常著名，所以后来的程序员在学习编程或进行设备调试时延续了这一习惯。";

            outputStream.write(content.getBytes());

            socket.shutdownOutput();

            int len;

            byte[] bytes = new byte[1024];

            InputStream inputStream = socket.getInputStream();

            StringBuffer sb = new StringBuffer();

            while ((len = inputStream.read(bytes)) != -1) {

                sb.append(new String(bytes, 0, len, "UTF-8"));

            }

            System.out.println("service return content: " + sb.toString());

            System.out.println("===");

            inputStream.close();

            outputStream.close();

            socket.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

Connected to the target VM, address: '127.0.0.1:61828', transport: 'socket'

===

service return content: recive over.

===

Disconnected from the target VM, address: '127.0.0.1:61828', transport: 'socket'

Process finished with exit code 0