struts2登陆成功后不会转向其他页面

UserAction里的方法login写：

HttpServletRequest request = ServletActionContext.getRequest();
		
url = request.getHeader("Referer");

 

struts.xml里写

 

<result name="success" type="redirect">
	<param name="location">${url}</param>
</result>
<result name="failure" type="redirect">
	<param name="location">${url}</param>
</result>