struts2 interceptor 获取访问类及方法进行拦截

public class LoginInterceptor extends AbstractInterceptor {

   @Override
   public String intercept(ActionInvocation invocation) throws Exception {
         ActionProxy proxy = invocation.getProxy();
         String methodName = proxy.getMethod();
         String actionName = proxy.getActionName();
         if ("login".equals(actionName)) {
               return invocation.invoke();
         }
         if (!(isLogin())) {
            ActionContext actionContext = invocation.getInvocationContext();
            HttpServletRequest request = (HttpServletRequest) actionContext
                               .get(StrutsStatics.HTTP_REQUEST);
            HttpServletResponse response = (HttpServletResponse) actionContext
                               .get(StrutsStatics.HTTP_RESPONSE);
           response.sendRedirect(request.getContextPath()
                        + "/loginmgmt/login!login.action"); 
           return null;
         }
        return invocation.invoke();
    }

}