Java 多線程ServerSocket通訊簡單實例(基於TCP協議)

首先是建立一個類繼承Thread類

package com.zzq.socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;

public class ServerThread extends Thread{
 Socket socket = null;

 /**
  * 每個線程共享當前socket
  * @param socket
  */
 public ServerThread(Socket socket){
  this.socket = socket;
 }
 @Override
 public void run() {
  //獲取輸入流 讀取客戶端信息
  InputStream is = null;
  InputStreamReader isr = null;
  BufferedReader br = null;
  //獲取輸出流 發送給客戶端
  OutputStream os = null;
  PrintWriter pw = null;
  try {
   is = socket.getInputStream();
   isr = new InputStreamReader(is);
   br = new BufferedReader(isr);
   String info = null;
   while((info = br.readLine())!=null){
    System.out.println("服務器 client:"+info);
   }
   socket.shutdownInput();
   os = socket.getOutputStream();
   //向客戶端發送信息
   pw = new PrintWriter(os);
   pw.write("200");
   pw.flush();
  } catch (IOException e) {
   e.printStackTrace();
  }finally{
   //關閉資源
   try {
    if(os!=null)
     os.close();
    if(pw!=null)
     pw.close();
    if(br!=null)
     br.close();
    if(isr!=null)
     isr.close();
    if(is!=null)
     is.close();
    if(socket!=null)
        socket.close();
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
 }
}

然後寫服務端代碼

package com.zzq.socket;
import java.io.IOException;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
public class TCPServerSocket {
 public static void main(String[] args) {
  try {
   //建立服務端socket 監聽8888端口
   ServerSocket serverSocket = new ServerSocket(8888);
   Socket socket = null;
   int count = 0;
   //循環獲取客戶端連接
   while(true){
    socket = serverSocket.accept();
    //客戶端連接 就使用 ServerThread線程 去處理socket讀取和輸入
    ServerThread serverThread = new ServerThread(socket);
    serverThread.start();
    count++;
    System.out.println("客戶端連接數量--("+count+")");
    InetAddress address = socket.getInetAddress();
    System.out.println("客戶端Ip "+address.getHostAddress());
   }
  } catch (IOException e) {
   e.printStackTrace();
  }
  
 }
}

接下去是客戶端

package com.zzq.socket;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
public class Client {
 public static void main(String[] args) {
  try {
   //創建客戶端套接字 指定服務器地址與端口
   Socket socket = new Socket("localhost",8888);
   OutputStream os = socket.getOutputStream();
   PrintWriter pw = new PrintWriter(os);
   pw.write("username:root password:123");
   pw.flush();
   socket.shutdownOutput();
   InputStream is = socket.getInputStream();
   BufferedReader br = new BufferedReader(new InputStreamReader(is));
   String info = null;
   while((info = br.readLine())!=null){
    System.out.println("服務器 client:"+info);
   }
   //關閉資源
   br.close();
   is.close();
   pw.close();
   os.close();
   socket.close();
  } catch (UnknownHostException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
 }
}