Java Socket TCP编程（Server端多线程处理）

 package com;

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

 /**
  * Socket Client
  * <p>
  * Created by Administrator on 2018/5/2.
  */
 public class Client {

     public static void main(String[] args) {

         try {

             // 1.初始化客户端socket连接
             Socket socket = new Socket("localhost", 8888);

             // 2.client发送消息
             OutputStream outputStream = socket.getOutputStream();
             PrintWriter printWriter = new PrintWriter(outputStream);
             printWriter.write("[name:jim, pwd:123]");
             printWriter.flush();
             socket.shutdownOutput();

             // 3.client接收消息
             InputStream inputStream = socket.getInputStream();
             InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
             BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
             String str;
             while ((str = bufferedReader.readLine()) != null) {
                 System.out.println("I am Client, now get message from Server:" + str);
             }

             // 4.关闭资源
             bufferedReader.close();
             inputStreamReader.close();
             inputStream.close();

             printWriter.close();
             outputStream.close();
             socket.close();

         } catch (IOException e) {
             e.printStackTrace();
         }
     }
 }

 package com;

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

 /**
  * Socket Server
  * <p>
  * Created by Administrator on 2018/5/2.
  */
 public class Server {

     public static void main(String[] args) {

         try {

             // 初始化服务端socket连接，并监听8888端口的socket请求
             ServerSocket serverSocket = new ServerSocket(8888);

             System.out.println("****** I am Server, now begin to wait the client ******");

             int count = 0;

             // 处理socket请求
             Socket socket = null;
             while (true) {

                 socket = serverSocket.accept();
                 ServerThread serverThread = new ServerThread(socket);
                 System.out.println("client host address is: " + socket.getInetAddress().getHostAddress());
                 serverThread.start();
                 count++;
                 System.out.println("now client count is: " + count);

             }
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
 }

 package com;

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

 /**
  * Created by Administrator on 2018/5/3.
  */
 public class ServerThread extends Thread {

     private Socket socket;

     public ServerThread(Socket socket) {
         this.socket = socket;
     }

     @Override
     public void run() {

         InputStream inputStream = null;
         InputStreamReader inputStreamReader = null;
         BufferedReader bufferedReader = null;
         OutputStream outputStream = null;
         PrintWriter printWriter = null;

         try {

             // server接收消息
             inputStream = socket.getInputStream();
             inputStreamReader = new InputStreamReader(inputStream);
             bufferedReader = new BufferedReader(inputStreamReader);

             String str;
             if ((str = bufferedReader.readLine()) != null) {
                 System.out.println("I am Server, now get message from Client: " + str);
             }
             socket.shutdownInput();

             // server发送消息
             outputStream = socket.getOutputStream();
             printWriter = new PrintWriter(outputStream);
             printWriter.write("[welcome to you!]");
             printWriter.flush();

         } catch (IOException e) {
             e.printStackTrace();
         } finally {
             // 关闭资源
             try {
                 if (printWriter != null) {
                     printWriter.close();
                 }
                 if (outputStream != null) {
                     outputStream.close();

                 }
                 if (bufferedReader != null) {
                     bufferedReader.close();
                 }
                 if (inputStreamReader != null) {
                     inputStreamReader.close();
                 }
                 if (inputStream != null) {
                     inputStream.close();
                 }
                 if (socket != null) {
                     socket.close();
                 }
             } catch (IOException e) {
                 e.printStackTrace();
             }
         }
     }
 }