普通类中获取request,session

在使用spring时,经常需要在普通类中获取session,request等对像. 
比如一些AOP拦截器类,在有使用struts2时,因为struts2有一个接口使用org.apache.struts2.ServletActionContext即可很方便的取到session对像. 

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

但在单独使用spring时如何在普通类中获取session,reuqest呢? 

第一种：
在web.xml增加如下代码: 

 <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListenerlistener-class>
 listener>

注解方式

 @Autowired
 private HttpSession session;
 @Autowired
 private HttpServletRequest request;

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

第二种：

 public class RequestUtils {
     private static final Logger log = LoggerFactory
             .getLogger(RequestUtils.class);
     private static ThreadLocal requestLocal= new ThreadLocal();


     public static HttpServletRequest getRequest() {
          return (HttpServletRequest)requestLocal.get();
     }

     public static void setRequest(HttpServletRequest request) {
           requestLocal.set(request);
     }
 }

 public class GetRequest implements Filter {

     /**
      * Default constructor.
      */
     public GetRequest() {
         // TODO Auto-generated constructor stub
     }

     /**
      * @see Filter#destroy()
      */
     public void destroy() {
         // TODO Auto-generated method stub
     }

     /**
      * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
      */
     public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
         // TODO Auto-generated method stub
         // place your code here
         RequestUtils.setRequest((HttpServletRequest)request);
         // pass the request along the filter chain
         chain.doFilter(request, response);
     }

     /**
      * @see Filter#init(FilterConfig)
      */
     public void init(FilterConfig fConfig) throws ServletException {
         // TODO Auto-generated method stub
     }

 }

在web.xml增加如下代码: 

 <filter>
                 <filter-name>GetRequestfilter-name>
         <filter-class>com.filter.GetRequestfilter-class>
 filter>
     <filter-mapping>
         <filter-name>GetRequestfilter-name>
         <url-pattern>/*url-pattern>
     filter-mapping>

本文转载于：http://blog.csdn.net/chenzenan/article/details/25387977