Java使用Socket实现通信

客户端程序

package com.jun.client;

import java.io.*;
import java.net.Socket;
import java.util.Scanner;

/**
 * 〈客户端程序〉<br>
 *
 * @author 未绪
 * @time 2018/2/16 12:42
 */
public class Client {

    private Socket socket;

    public Client(String[] args) {
        try {
            socket = new Socket("localhost", 8080);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void connect() {

        try {
            OutputStream out = socket.getOutputStream();
            OutputStreamWriter osw = new OutputStreamWriter(out, "UTF-8");
            PrintWriter pw = new PrintWriter(osw, true);
            BufferedReader brc = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            Scanner scanner = new Scanner(System.in);
            while (true) {
                sendCmdAndGetResult(scanner,brc,pw);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (socket != null) {
                try {
                    socket.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 向服务器发送数据并获得返回结果
     * @param scanner
     * @param brc
     * @param pw
     * @throws IOException
     */
    public void sendCmdAndGetResult(Scanner scanner,BufferedReader brc,PrintWriter pw) throws IOException {
        pw.println(scanner.nextLine());
        String result = brc.readLine();
        System.out.println(result);

    }

    public static void main(String[] args) {

        Client client = new Client(args);
        client.connect();

    }

}

服务器端程序

package com.jun.server;

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;

/**
 * 〈服务器〉<br>
 *
 * @author 未绪
 * @time 2018/2/12 21:06
 */
public class ServerMain {

    private ServerSocket serverSocket;

    public static void main(String[] args) {
        ServerMain server= new ServerMain();
        server.connect();                   //等待连接客户端
    }

    /**
     * 连接到客户端
     */
    public void connect(){
        try{
            serverSocket = new ServerSocket(8080);
            Socket socket = serverSocket.accept();//阻塞等待客户端的连接
            InputStream in = socket.getInputStream();
            InputStreamReader isr = new InputStreamReader(in, "UTF-8");
            BufferedReader br = new BufferedReader(isr);
            PrintWriter pw=new PrintWriter(socket.getOutputStream(),true);
            Scanner scanner = new Scanner(System.in);
            while(true){        //读取客户端的数据
                readCmdAndReturnResult(br,pw,scanner);
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取客户端传过来的数据并处理数据
     * @param br 缓冲流Reader
     * @param pw 向客户端写数据
     * @throws IOException
     */
    public void readCmdAndReturnResult(BufferedReader br,PrintWriter pw,Scanner scanner) throws IOException {
        String msg=br.readLine();           //读取客户端数据
        System.out.println(msg);
        pw.println(scanner.nextLine());

    }

}