android socket

最新推荐文章于 2024-01-23 10:27:45 发布

最新推荐文章于 2024-01-23 10:27:45 发布 · 201 阅读

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#Socket #Android #Java #.net

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本文介绍了一个使用Java实现的简易聊天服务器程序。该程序利用多线程处理多个客户端连接请求，并通过Socket进行通信。服务器能够接收客户端消息并广播给所有在线用户。

server:

package com.socket;




import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**1.服务器程序：
 * com Server
 * 
 * @author hechuan
 * @version 1.0
 */
public class Main {

    private static final int PORT = 9999;// 端口监听
    private List<Socket> mList = new ArrayList<Socket>();// 存放客户端socket
    private ServerSocket server = null;
    private ExecutorService mExecutorService = null;// 线程池

    /**
     * @param args
     */
    public static void main(String[] args) {
        new Main();
    }

    public Main() {
        try {
            server = new ServerSocket(PORT);
            mExecutorService = Executors.newCachedThreadPool();// 创建一个线程池
            System.out.println("Server Start...");
            Socket client = null;
            while (true) {
                client = server.accept();
                mList.add(client);
                mExecutorService.execute(new Service(client));// 开启一个客户端线程.
            }
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    public class Service implements Runnable {

        private Socket socket;
        private BufferedReader in = null;
        private String msg = "";

        public Service(Socket socket) {
            this.socket = socket;
            try {
                in = new BufferedReader(new InputStreamReader(socket
                        .getInputStream()));
                msg = "user:" + this.socket.getInetAddress() + " time "+DateTime.getTimeLocal("s")+" come total:"
                        + mList.size();
                this.sendmsg();
            } catch (IOException e) {
                System.out.println(e.getLocalizedMessage());
            }
        }

        public void run() {
            try {
                while (true) {
                    if ((msg = in.readLine()) != null) {
                        if (msg.equals("exit")) {
                            mList.remove(socket);
                            in.close();
                            msg = "user:" + socket.getInetAddress()
                                    + " exit total:" + mList.size();
                            socket.close();
                            this.sendmsg();
                            break;
                        } else {
                            msg = socket.getInetAddress() + " : " + new String(msg.getBytes(),"UTF-8");
                            this.sendmsg();
                        }
                    }

                }
            } catch (Exception ex) {
                //add by hechuan begin
                mList.remove(socket);
                //add by hechuan end
                System.out.println("server 读取数据异常");
            }
        }

        /**
         * 发送消息给所有客户端
         */
        public void sendmsg() {
            System.out.println(msg);
            int num = mList.size();
            for (int i = 0; i < num; i++) {
                Socket mSocket = mList.get(i);
                PrintWriter pout = null;
                try {
                    pout = new PrintWriter(new BufferedWriter(
                            new OutputStreamWriter(mSocket.getOutputStream())),
                            true);
                    pout.println(msg);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}