User goes to url
@RequestMapping(value="/link/{update}", method=RequestMethod.GET) If he is not authorized, he is transferred to the login page. The user is authorized and his redirect to
@RequestMapping(value="/link", method=RequestMethod.GET) This link is without the {update} parameter and they have to re-click the link /link/{update} . It turns out if the user is not authorized and {update} contained, write the parameter to the session. After authorization to pull out the session, if there is one, pull the parameter from there?