spring+websocket整合

将与Spring有关的jar包的版本都升级为4.0.0以上，并且在web.xml中将<web-app>里面的version改为"3.0"

1 在maven的pom.xml中加入websocket所依赖的jar包

<!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>4.3.7.RELEASE</version>
			<scope>test</scope>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>

		<dependency><!-- 加入两个webscoket的依赖包 -->
			<groupId>org.springframework</groupId>
			<artifactId>spring-websocket</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-messaging</artifactId>	
			<version>4.3.7.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency>
	
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>4.3.7.RELEASE</version>
		</dependency> 

2 更新web.xml中namespace.xsd

<web-app   
		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
		xmlns="http://java.sun.com/xml/ns/javaee
		http://www.springframework.org/schema/beans"
		xmlns:websocket="http://www.springframework.org/schema/websocket"   
		xsi:schemaLocation="
		http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd  
        http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket.xsd" 
        id="WebApp_ID" version="3.1">

 3 更新spring框架的jar包至4.0以上（spring-core, spring-context, spring-web and spring-webmvc）

1. <servlet>  
2.     <servlet-name>websocketServlet</servlet-name>  
3.     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
4.     <init-param>  
5.         <param-name>contextConfigLocation</param-name>  
6.         <param-value>classpath*:META-INF/spring/websocketmessage-applicationContext.xml</param-value>  
7.     </init-param>  
8.     <async-supported>true</async-supported>  
9. </servlet>  
10. <servlet-mapping>  
11.     <servlet-name>websocketServlet</servlet-name>  
12.     <url-pattern>/websocket/*</url-pattern>  
13. </servlet-mapping> 

•  4.1创建websocket处理类

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1. package com.up.websocket.handler;  
2.   
3. import org.springframework.web.socket.TextMessage;  
4. import org.springframework.web.socket.WebSocketSession;  
5. import org.springframework.web.socket.handler.TextWebSocketHandler;  
6.   
7. public class WebsocketEndPoint extends TextWebSocketHandler {  
8.   
9.     @Override  
10.     protected void handleTextMessage(WebSocketSession session,  
11.             TextMessage message) throws Exception {  
12.         super.handleTextMessage(session, message);  
13.         TextMessage returnMessage = new TextMessage(message.getPayload()+" received at server");  
14.         session.sendMessage(returnMessage);  
15.     }  
16. }  

• 4.2创建握手（handshake）接口

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1. package com.up.websocket;  
2.   
3. import java.util.Map;  
4.   
5. import org.springframework.http.server.ServerHttpRequest;  
6. import org.springframework.http.server.ServerHttpResponse;  
7. import org.springframework.web.socket.WebSocketHandler;  
8. import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor;  
9.   
10. public class HandshakeInterceptor extends HttpSessionHandshakeInterceptor{  
11.   
12.     @Override  
13.     public boolean beforeHandshake(ServerHttpRequest request,  
14.             ServerHttpResponse response, WebSocketHandler wsHandler,  
15.             Map<String, Object> attributes) throws Exception {  
16.         System.out.println("Before Handshake");  
17.         return super.beforeHandshake(request, response, wsHandler, attributes);  
18.     }  
19.   
20.     @Override  
21.     public void afterHandshake(ServerHttpRequest request,  
22.             ServerHttpResponse response, WebSocketHandler wsHandler,  
23.             Exception ex) {  
24.         System.out.println("After Handshake");  
25.         super.afterHandshake(request, response, wsHandler, ex);  
26.     }  
27.   
28. }  

• 5 处理类和握手协议的spring配置(applicationContext.xml文件）

<bean id="websocket" class="com.ym.crud.utils.WebsocketEndPoint"/>
	<websocket:handlers>
		<websocket:mapping path="/websocket" handler="websocket" />
		<websocket:handshake-interceptors>
			<bean class="com.ym.crud.utils.HandshakeInterceptor" />
		</websocket:handshake-interceptors>
	</websocket:handlers> 

• 6 客户端页面

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1. <!DOCTYPE html>  
2. <html>  
3. <head>  
4.     <title>WebSocket/SockJS Echo Sample (Adapted from Tomcat's echo sample)</title>  
5.     <style type="text/css">  
6.         #connect-container {  
7.             float: left;  
8.             width: 400px  
9.         }  
10.   
11.         #connect-container div {  
12.             padding: 5px;  
13.         }  
14.   
15.         #console-container {  
16.             float: left;  
17.             margin-left: 15px;  
18.             width: 400px;  
19.         }  
20.   
21.         #console {  
22.             border: 1px solid #CCCCCC;  
23.             border-right-color: #999999;  
24.             border-bottom-color: #999999;  
25.             height: 170px;  
26.             overflow-y: scroll;  
27.             padding: 5px;  
28.             width: 100%;  
29.         }  
30.   
31.         #console p {  
32.             padding: 0;  
33.             margin: 0;  
34.         }  
35.     </style>  
36.   
37.     <script src="http://cdn.sockjs.org/sockjs-0.3.min.js"></script>  
38.   
39.     <script type="text/javascript">  
40.         var ws = null;  
41.         var url = null;  
42.         var transports = [];  
43.   
44.         function setConnected(connected) {  
45.             document.getElementById('connect').disabled = connected;  
46.             document.getElementById('disconnect').disabled = !connected;  
47.             document.getElementById('echo').disabled = !connected;  
48.         }  
49.   
50.         function connect() {  
51.             alert("url:"+url);  
52.             if (!url) {  
53.                 alert('Select whether to use W3C WebSocket or SockJS');  
54.                 return;  
55.             }  
56.   
57.             ws = (url.indexOf('sockjs') != -1) ?   
58.                 new SockJS(url, undefined, {protocols_whitelist: transports}) : new WebSocket(url);  
59.   
60.             ws.onopen = function () {  
61.                 setConnected(true);  
62.                 log('Info: connection opened.');  
63.             };  
64.             ws.onmessage = function (event) {  
65.                 log('Received: ' + event.data);  
66.             };  
67.             ws.onclose = function (event) {  
68.                 setConnected(false);  
69.                 log('Info: connection closed.');  
70.                 log(event);  
71.             };  
72.         }  
73.   
74.         function disconnect() {  
75.             if (ws != null) {  
76.                 ws.close();  
77.                 ws = null;  
78.             }  
79.             setConnected(false);  
80.         }  
81.   
82.         function echo() {  
83.             if (ws != null) {  
84.                 var message = document.getElementById('message').value;  
85.                 log('Sent: ' + message);  
86.                 ws.send(message);  
87.             } else {  
88.                 alert('connection not established, please connect.');  
89.             }  
90.         }  
91.   
92.         function updateUrl(urlPath) {  
93.             if (urlPath.indexOf('sockjs') != -1) {  
94.                 url = urlPath;  
95.                 document.getElementById('sockJsTransportSelect').style.visibility = 'visible';  
96.             }  
97.             else {  
98.               if (window.location.protocol == 'http:') {  
99.                   url = 'ws://' + window.location.host + urlPath;  
100.               } else {  
101.                   url = 'wss://' + window.location.host + urlPath;  
102.               }  
103.               document.getElementById('sockJsTransportSelect').style.visibility = 'hidden';  
104.             }  
105.         }  
106.   
107.         function updateTransport(transport) {  
108.             alert(transport);  
109.           transports = (transport == 'all') ?  [] : [transport];  
110.         }  
111.           
112.         function log(message) {  
113.             var console = document.getElementById('console');  
114.             var p = document.createElement('p');  
115.             p.style.wordWrap = 'break-word';  
116.             p.appendChild(document.createTextNode(message));  
117.             console.appendChild(p);  
118.             while (console.childNodes.length > 25) {  
119.                 console.removeChild(console.firstChild);  
120.             }  
121.             console.scrollTop = console.scrollHeight;  
122.         }  
123.     </script>  
124. </head>  
125. <body>  
126. <noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets   
127.     rely on Javascript being enabled. Please enable  
128.     Javascript and reload this page!</h2></noscript>  
129. <div>  
130.     <div id="connect-container">  
131.         <input id="radio1" type="radio" name="group1" onclick="updateUrl(''/spring-websocket-uptest/websocket');">  
132.             <label for="radio1">W3C WebSocket</label>  
133.         <br>  
134.         <input id="radio2" type="radio" name="group1" onclick="updateUrl('/spring-websocket-uptest/websocket');">  <!--中间的为项目名称-->
135.             <label for="radio2">SockJS</label>  
136.         <div id="sockJsTransportSelect" style="visibility:hidden;">  
137.             <span>SockJS transport:</span>  
138.             <select onchange="updateTransport(this.value)">  
139.               <option value="all">all</option>  
140.               <option value="websocket">websocket</option>  
141.               <option value="xhr-polling">xhr-polling</option>  
142.               <option value="jsonp-polling">jsonp-polling</option>  
143.               <option value="xhr-streaming">xhr-streaming</option>  
144.               <option value="iframe-eventsource">iframe-eventsource</option>  
145.               <option value="iframe-htmlfile">iframe-htmlfile</option>  
146.             </select>  
147.         </div>  
148.         <div>  
149.             <button id="connect" onclick="connect();">Connect</button>  
150.             <button id="disconnect" disabled="disabled" onclick="disconnect();">Disconnect</button>  
151.         </div>  
152.         <div>  
153.             <textarea id="message" style="width: 350px">Here is a message!</textarea>  
154.         </div>  
155.         <div>  
156.             <button id="echo" onclick="echo();" disabled="disabled">Echo message</button>  
157.         </div>  
158.     </div>  
159.     <div id="console-container">  
160.         <div id="console"></div>  
161.     </div>  
162. </div>  
163. </body>  
164. </html>  

原创出处： http://blog.youkuaiyun.com/gisredevelopment/article/details/38392629

http://blog.youkuaiyun.com/zhangbojun888/article/details/41593225