webSocket-简单的服务端定时推送以及重连

本文章是对webSocket的学习，在使用webSocket进行客户端-服务端的交互。

参考文章： Java基于Socket的简单推送，在文章在服务端 输入后回车 ，可进行对客户端的信息发送，同时进行回馈。

以下为自行改进：服务端定时推送信息到客户端，可根据自行需要进行调整。

说明：jdk1.8，在定时的选择，是服务端或者客户端断开可以重新连接。

Server：

package demo4;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.ByteArrayInputStream;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.ServerSocket;import java.net.Socket;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.concurrent.Executors;import java.util.concurrent.ScheduledExecutorService;import java.util.concurrent.TimeUnit;public class MyPushServer {//存储连接ipArrayList<Socket> sockets = new ArrayList<Socket>();//定时器private ScheduledExecutorService service = Executors.newSingleThreadScheduledExecutor();//计数private static int i=1;//主程序public static void main(String[] args) {MyPushServer myPushServer = new MyPushServer();try {myPushServer.start();} catch (IOException e) {e.printStackTrace();}}//程序运行public void start() throws IOException {@SuppressWarnings("resource")ServerSocket serverSocket = new ServerSocket(4000);System.out.println("服务启动成功···");while (true) {//长启动Socket socket = serverSocket.accept();System.out.println("server started... http:/"+ socket.getLocalAddress() + ":" + socket.getPort());System.out.println(socket.getLocalSocketAddress() + ":"+ socket.getLocalPort());sockets.add(socket);//添加ip列表if(i == 1){//保证只需起来一次synchronized (ServerSocket.class) {ServerThread serverThread = new ServerThread();serverThread.start();}}i++;}}//线程任务class ServerThread extends Thread {private BufferedReader reader;private BufferedWriter writer;private BufferedReader read;public ServerThread() {Runnable runnable = new Runnable() {              public void run() {              //发送内容-流            String str = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date());InputStream inputStream = new ByteArrayInputStream(str.getBytes());reader = new BufferedReader(new InputStreamReader(inputStream));            }          };         // 第二个参数为首次执行的延时时间，第三个参数为定时执行的间隔时间          // 第一次执行间隔为10毫秒，随后1000毫秒执行循环        service.scheduleAtFixedRate(runnable, 10, 1000, TimeUnit.MILLISECONDS);  }@Overridepublic void run() {String content = null;//发送内容String getContent = null;//返回内容while (true) {try {if ((content = reader.readLine()) != null) {for (Socket socket : sockets) {System.out.println("socket:"+socket);try{       socket.sendUrgentData(0xFF);  //验证连接是否断开，以忽悠为一个字节的发送进行验证    writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));    writer.write(content);    writer.newLine();    writer.flush();//发送    read = new BufferedReader(new InputStreamReader(socket.getInputStream()));    if((getContent = read.readLine()) != null) {    System.out.println(getContent);    }}catch(Exception ex){  sockets.remove(socket);//移除断开的连接continue;}   }}} catch (Exception e) {e.getStackTrace();}}}}}

Client

package demo4;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.Socket;import java.util.Timer;import java.util.TimerTask;public class MyPushClient {private Socket socket;public static void main(String[] args) {startConn();}/** * 长连接（可断线重连） * @Title: startConn * @Description: TODO(这里用一句话描述这个方法的作用) * @param:  * @return: void * @throws */public static void startConn() {Timer timer = new Timer();TimerTask task = new TimerTask() {@Overridepublic void run() {MyPushClient myPushClient = new MyPushClient();try {myPushClient.start();timer.cancel();System.out.println("连接成功！");} catch (Exception e1) {System.out.println("连接失败，重新连接中···");}}};long delay = 0;long intevalPeriod = 1 * 1500;timer.scheduleAtFixedRate(task, delay, intevalPeriod);}/** * 开始连接 * @Title: start * @Description: TODO(这里用一句话描述这个方法的作用) * @param: @throws IOException * @return: void * @throws */public void start() throws IOException {socket = new Socket("10.200.47.222", 4000);System.out.println("server connection..");ClientThread clientThread = new ClientThread();clientThread.start();}/** * 连接线程-事件 * @ClassName: ClientThread * @Description:TODO(这里用一句话描述这个类的作用) * @author: [zhu] * @date: 2017年6月12日 下午4:59:35 */class ClientThread extends Thread {private BufferedReader reader;private BufferedWriter writer;public ClientThread() {try {reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));} catch (IOException e) {e.printStackTrace();}}@Overridepublic void run() {String content = null;while (true) {try {if ((content = reader.readLine()) != null) {System.out.println(content);writer.write("收到消息");writer.newLine();writer.flush();}} catch (IOException e) {// 断线重连startConn();break;}}}}}

最后：可能会出现乱码，待解决中，会面完善会及时补上。