一.服务层
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package com.demo.websocket;import java.io.IOException;import java.util.Iterator;import java.util.concurrent.ConcurrentLinkedQueue;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;import org.springframework.context.annotation.Configuration;import org.springframework.web.socket.CloseStatus;import org.springframework.web.socket.TextMessage;import org.springframework.web.socket.WebSocketSession;import org.springframework.web.socket.config.annotation.EnableWebSocket;import org.springframework.web.socket.config.annotation.WebSocketConfigurer;import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;import org.springframework.web.socket.handler.TextWebSocketHandler;@Configuration@EnableWebSocketpublic class websocketListener implements WebSocketConfigurer, ServletContextListener{ private ConcurrentLinkedQueue<WebSocketSession> sessions = new ConcurrentLinkedQueue<WebSocketSession>(); private WebSocketHandlerTest handler; @Override public void contextDestroyed(ServletContextEvent arg0) { // TODO Auto-generated method stub } @Override public void contextInitialized(ServletContextEvent arg0) { // TODO Auto-generated method stub } @Override public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) { handler = new WebSocketHandlerTest(); registry.addHandler(handler, "/ws/notifymessage.ws"); registry.addHandler(handler, "/ws/sockjs/notifymessage.ws").withSockJS(); new Thread(handler).start(); } class WebSocketHandlerTest extends TextWebSocketHandler implements Runnable{ @Override public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception { sessions.remove(session); } @Override public void afterConnectionEstablished(WebSocketSession session) throws Exception { sessions.add(session); } @Override protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception { super.handleTextMessage(session, message); } @Override public void run() { System.out.println("等待推送...."); try { int i = 0; for (;;) { synchronized (this) { try { Thread.sleep(3000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } if(i%10==0){ System.out.println("推送消息了...."); }else{ System.out.println("本次不推送消息了...."); } i++; } } catch (IOException e) { e.printStackTrace(); System.out.println("失败...."); } } private void nofity(String message) throws IOException { Iterator<WebSocketSession> iterator = sessions.iterator(); while (iterator.hasNext()) { WebSocketSession session = iterator.next(); synchronized(session){ if(session.isOpen()){ session.sendMessage(new TextMessage(message)); }else{ iterator.remove(); } } } } }} |
二.前台界面监听
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<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Insert title here</title></head><body>websocket测试界面</body><script type="text/javascript">var websocketPath = "localhost:8080/demo-web";if ('WebSocket' in window) { websocket = new WebSocket("ws://"+websocketPath+"/ws/notifymessage.ws");} else if ('MozWebSocket' in window) { websocket = new MozWebSocket("ws://"+websocketPath+"/ws/notifymessage.ws");} else { websocket = new SockJS("ws://"+websocketPath+"/ws/notifymessage.ws");}websocket.onopen = function (evnt) {};websocket.onmessage = function (evnt) { console.log(evnt);};websocket.onerror = function (evnt) {};websocket.onclose = function (evnt) {}</script></html> |
注意web.xml中配置DispatcherServlet控制器
spring-servlet.xml空文件
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<servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/spring-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>*.ws</url-pattern> </servlet-mapping> |
以上所述是小编给大家介绍的Java中websocket消息推送的实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：http://www.cnblogs.com/tianzhongshan/archive/2017/02/13/6392752.html
