首先要在web.xml增加如下代码:

<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>

service层调用

@Autowired  
private HttpSession session;  

@Autowired  
private

普通类中

// 这里整体是一行
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();