Spring和websocket整合应用示例（上）
嗯，这次真的仅仅是一个入门教程，因为老夫表示自己也不会。近期老夫参与开发公司的一个CRM系统，系统中有很多消息的推送，由一个同事负责，其用到了websocket技术，老夫比较感兴趣，删繁就简，整理了一个教程，留作自己笔记，因很多原理老夫也是不甚了了，以备将来用到了有资料可查。 maven依赖 <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.3.0</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.3.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-websocket</artifactId> <version>4.0.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-messaging</artifactId> <version>4.0.1.RELEASE</version> </dependency> spring-servlet的配置 <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:websocket="http://www.springframework.org/schema/websocket" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket.xsd"> …… <!– websocket –> <bean id="websocket" class="cn.bridgeli.websocket.WebsocketEndPoint"/> <websocket:handlers> <websocket:mapping path="/websocket" handler="websocket"/> <websocket:handshake-interceptors> <bean class="cn.bridgeli.websocket.HandshakeInterceptor"/> </websocket:handshake-interceptors> </websocket:handlers> </beans> 其中，path对应的路径就是前段通过ws协议调的接口路径 HandshakeInterceptor的实现 package cn.bridgeli.websocket; import cn.bridgeli.utils.UserManager; import cn.bridgeli.util.DateUtil; import cn.bridgeli.sharesession.UserInfo; import org.apache.commons.lang.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.http.server.ServerHttpRequest; import org.springframework.http.server.ServerHttpResponse; import org.springframework.web.context.request.RequestContextHolder; import org.springframework.web.context.request.ServletRequestAttributes; import org.springframework.web.socket.WebSocketHandler; import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor; import java.util.Date; import java.util.Map; /** * @Description :创建握手（handshake）接口 * @Date : 16-3-3 */ public class HandshakeInterceptor extends HttpSessionHandshakeInterceptor{ private static final Logger logger = LoggerFactory.getLogger(HandshakeInterceptor.class); @Override public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) throws Exception { logger.info("建立握手前…"); ServletRequestAttributes attrs = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes(); UserInfo currUser = UserManager.getSessionUser(attrs.getRequest()); UserSocketVo userSocketVo = new UserSocketVo(); String email= ""; if(null != currUser){ email = currUser.getEmail(); } if(StringUtils.isBlank(email)){ email = DateUtil.date2String(new Date()); } userSocketVo.setUserEmail(email); attributes.put("SESSION_USER", userSocketVo); return super.beforeHandshake(request, response, wsHandler, attributes); } @Override public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception ex) { logger.info("建立握手后…"); super.afterHandshake(request, response, wsHandler, ex); } } 因为老夫不是很懂，所以最大限度的保留原代码，这其实就是从单点登录中取出当前登录用户，转成UserSocketVo对象，放到Map中。所以接下来我们看看UserSocketVo对象的定义 ...