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: 

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

註解方式

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

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

第二種：

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

	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
	}

}
 

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