應用java多線程實現server端與多client之間的通信

應用多線程來實現server與多線程之間的通信的基本步驟

1、server端創建ServerSocket,循環調用accept()等待client鏈接

2、client創建一個Socket並請求和server端鏈接

3、server端接受client請求，創建socekt與該client建立專線鏈接

4、建立鏈接的socket在一個單獨的線程上對話

5、server繼續等待新的鏈接

server端Server.java

package test.concurrent.socket;

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

/**
 * Created by dong on 15-6-22.
 * 基於TCP協議的Socket通信。實現用戶登錄
 * 服務器端
 */
public class Server {

    public static void main(String[] args) {

        try {
            //1、創建一個服務器端Socket,即ServerSocket, 指定綁定的端口，並監聽此端口
            ServerSocket serverSocket = new ServerSocket(8888);
            Socket socket = null;
            //記錄client的數量
            int count = 0;
            System.out.println("***服務器即將啟動，等待client的鏈接***");
            //循環監聽等待client的鏈接
            while (true){
                //調用accept()方法開始監聽，等待client的鏈接
                socket = serverSocket.accept();
                //創建一個新的線程
                ServerThread serverThread = new ServerThread(socket);
                //啟動線程
                serverThread.start();

                count++; //統計client的數量
                System.out.println("client的數量: " + count);
                InetAddress address = socket.getInetAddress();
                System.out.println("當前client的IP ： " + address.getHostAddress());
            }

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

服務器端線程處理類ServerThread.java

package test.concurrent.socket;

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

/**
 * Created by dong on 15-6-22.
 * server端線程處理類
 */
public class ServerThread extends Thread {

    //和本線程相關的Socket
    Socket socket = null;
    public ServerThread(Socket socket){
        this.socket = socket;
    }

    //線程運行的操作，響應client的請求
    public void run(){

        InputStream is = null;
        InputStreamReader isr = null;
        BufferedReader br = null;

        OutputStream os = null;
        PrintWriter pw = null;
        try {

            //獲取一個輸入流，並讀取client的信息
            is = socket.getInputStream();
            isr = new InputStreamReader(is); //將字節流轉化為字符流
            br = new BufferedReader(isr); //加入緩沖
            String info = null;
            //循環讀取數據
            while ((info = br.readLine()) != null){
                System.out.println("我是server。client說: " +info);
            }

            socket.shutdownInput(); //關閉輸入流

            //獲取輸出流。響應client的請求
            os = socket.getOutputStream();
            pw = new PrintWriter(os); //包裝為打印流
            pw.write("歡迎你");
            pw.flush();  //將緩存輸出


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


                try {
                    //關閉資源
                    if (pw != null)
                        pw.close();
                    if (os != null)
                        os.close();
                    if (is != null)
                        is.close();
                    if (isr != null)
                        isr.close();
                    if (br != null)
                        br.close();
                    if (socket != null)
                        socket.close();
                } catch (IOException e) {
                    e.printStackTrace();

                }

        }



    }
}

clientClient.java

package test.concurrent.socket;

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

/**
 * Created by dong on 15-6-22.
 * client
 */
public class Client {

    public static void main(String[] args) {

        try {
            //1、創建clientSocket，指定server端口號和地址
            Socket socket = new Socket("localhost",8888);
            //2、獲取輸出流,向server發送信息
            OutputStream os = socket.getOutputStream(); //字節輸出流
            PrintWriter pw  = new PrintWriter(os); //將輸出流包裝為打印流
            pw.write("username:tom; password：456");
            pw.flush();
            socket.shutdownOutput(); //關閉輸出流

            InputStream is = socket.getInputStream();
            InputStreamReader isr = new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);

            String info = null;
            //循環讀取
            while ((info = br.readLine()) != null){
                System.out.println("我是client:server說:" + info);
            }

            br.close();
            is.close();
            isr.close();


            pw.close();
            os.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}