怎么能加强门户网站建设,wordpress 腾讯cdn,wordpress数据表格,网络营销的方法和手段有哪些文章目录 一、介绍#xff1a;二、案例#xff1a;三、使用#xff1a;【1】导入WebSocket的maven坐标【2】导入WebSocket服务端组件WebSocketServer#xff0c;用于和客户端通信【3】导入配置类WebSocketConfiguration#xff0c;注册WebSocket的服务端组件【4】导入定时… 文章目录 一、介绍二、案例三、使用【1】导入WebSocket的maven坐标【2】导入WebSocket服务端组件WebSocketServer用于和客户端通信【3】导入配置类WebSocketConfiguration注册WebSocket的服务端组件【4】导入定时任务类WebSocketTask定时向客户端推送数据【5】服务实现类【6】前端 一、介绍 二、案例 三、使用
【1】导入WebSocket的maven坐标
dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-websocket/artifactId
/dependency【2】导入WebSocket服务端组件WebSocketServer用于和客户端通信
/*** WebSocket服务*/
Component
ServerEndpoint(/ws/{sid})
public class WebSocketServer {//存放会话对象private static MapString, Session sessionMap new HashMap();/*** 连接建立成功调用的方法*/OnOpenpublic void onOpen(Session session, PathParam(sid) String sid) {System.out.println(客户端 sid 建立连接);sessionMap.put(sid, session);}/*** 收到客户端消息后调用的方法** param message 客户端发送过来的消息*/OnMessagepublic void onMessage(String message, PathParam(sid) String sid) {System.out.println(收到来自客户端 sid 的信息: message);}/*** 连接关闭调用的方法** param sid*/OnClosepublic void onClose(PathParam(sid) String sid) {System.out.println(连接断开: sid);sessionMap.remove(sid);}/*** 群发** param message*/public void sendToAllClient(String message) {CollectionSession sessions sessionMap.values();for (Session session : sessions) {try {//服务器向客户端发送消息session.getBasicRemote().sendText(message);} catch (Exception e) {e.printStackTrace();}}}}【3】导入配置类WebSocketConfiguration注册WebSocket的服务端组件
/*** WebSocket配置类用于注册WebSocket的Bean*/
Configuration
public class WebSocketConfiguration {Beanpublic ServerEndpointExporter serverEndpointExporter() {return new ServerEndpointExporter();}}【4】导入定时任务类WebSocketTask定时向客户端推送数据
Component
public class WebSocketTask {Autowiredprivate WebSocketServer webSocketServer;/*** 通过WebSocket每隔5秒向客户端发送消息*/Scheduled(cron 0/5 * * * * ?)public void sendMessageToClient() {webSocketServer.sendToAllClient(这是来自服务端的消息 DateTimeFormatter.ofPattern(HH:mm:ss).format(LocalDateTime.now()));}
} 【5】服务实现类
Map map new HashMap();map.put(type, 1);//通知类型 1来单提醒 2客户催单
map.put(orderId, orders.getId());//订单id
map.put(content,订单号: outTradeNo);webSocketServer.sendToAllClient(JSON.toJSONString(map));【6】前端 websocket.html
!DOCTYPE HTML
html
headmeta charsetUTF-8titleWebSocket Demo/title
/head
bodyinput idtext typetext /button onclicksend()发送消息/buttonbutton onclickcloseWebSocket()关闭连接/buttondiv idmessage/div
/body
script typetext/javascriptvar websocket null;var clientId Math.random().toString(36).substr(2);//判断当前浏览器是否支持WebSocketif(WebSocket in window){//连接WebSocket节点websocket new WebSocket(ws://localhost:8080/ws/clientId);}else{alert(Not support websocket)}//连接发生错误的回调方法websocket.onerror function(){setMessageInnerHTML(error);};//连接成功建立的回调方法websocket.onopen function(){setMessageInnerHTML(连接成功);}//接收到消息的回调方法websocket.onmessage function(event){setMessageInnerHTML(event.data);}//连接关闭的回调方法websocket.onclose function(){setMessageInnerHTML(close);}//监听窗口关闭事件当窗口关闭时主动去关闭websocket连接防止连接还没断开就关闭窗口server端会抛异常。window.onbeforeunload function(){websocket.close();}//将消息显示在网页上function setMessageInnerHTML(innerHTML){document.getElementById(message).innerHTML innerHTML br/;}//发送消息function send(){var message document.getElementById(text).value;websocket.send(message);}//关闭连接function closeWebSocket() {websocket.close();}
/script
/html
