如何在spring环境中搭建websocket

<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.4.0</version></dependency><dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.4.0</version></dependency><dependency>  <groupId>org.springframework</groupId>  <artifactId>spring-websocket</artifactId>//version须和spring mvc的version保持一致，否则会出现问题  <version>4.0.5.RELEASE</version></dependency><dependency>  <groupId>org.springframework</groupId>  <artifactId>spring-messaging</artifactId>  <version>4.0.5.RELEASE</version></dependency>