用法:ServletActionContext.getRequest().getSession(); 

但在單獨使用spring時如何在普通類中獲取session,reuqest呢? 

第一種：
在web.xml增加如下程式碼: 

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

註解方式

1. @Autowired    
2. private HttpSession session;      
3. @Autowired    
4. private HttpServletRequest request;    

1. HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();   

第二種：

1. publicclass RequestUtils {  
2.     privatestaticfinal Logger log = LoggerFactory  
3.             .getLogger(RequestUtils.class);  
4.     privatestatic ThreadLocal<HttpServletRequest> requestLocal= new ThreadLocal<HttpServletRequest>();  
5.     publicstatic HttpServletRequest getRequest() {  
6.          return (HttpServletRequest)requestLocal.get();    
7.     }  
8.     publicstaticvoid setRequest(HttpServletRequest request) {  
9.           requestLocal.set(request);    
10.     }  
11. }  

1. publicclass GetRequest implements Filter {  
2.     /** 
3.      * Default constructor.  
4.      */
5.     public GetRequest() {  
6.         // TODO Auto-generated constructor stub
7.     }  
8.     /** 
9.      * @see Filter#destroy() 
10.      */
11.     publicvoid destroy() {  
12.         // TODO Auto-generated method stub
13.     }  
14.     /** 
15.      * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain) 
16.      */
17.     publicvoid doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {  
18.         // TODO Auto-generated method stub
19.         // place your code here
20.         RequestUtils.setRequest((HttpServletRequest)request);  
21.         // pass the request along the filter chain
22.         chain.doFilter(request, response);  
23.     }  
24.     /** 
25.      * @see Filter#init(FilterConfig) 
26.      */
27.     publicvoid init(FilterConfig fConfig) throws ServletException {  
28.         // TODO Auto-generated method stub
29.     }  
30. }  

1. <filter>
2.                 <filter-name>GetRequest</filter-name>
3.         <filter-class>com.filter.GetRequest</filter-class>
4. </filter>
5.     <filter-mapping>
6.         <filter-name>GetRequest</filter-name>
7.         <url-pattern>/*</url-pattern>
8.     </filter-mapping>