SPRINGMVC Sessionfilter Login Filter

1. Configuring in Web. xml

1 <!--Sessionfilter -2 3 <Filter>4     <Filter-name>Sessionfilter</Filter-name>5     <Filter-class>Com.juin.filter.SessionFilter</Filter-class>6 </Filter>7 8 <filter-mapping>9     <Filter-name>Sessionfilter</Filter-name>Ten     <Url-pattern>/*</Url-pattern> One </filter-mapping> A  - <!--above cutoff sessionfilter -

2. Create a Sessionfilter class

1  PackageCom.juin.filter;2 3 Importjava.io.IOException;4 ImportJavax.servlet.FilterChain;5 Importjavax.servlet.ServletException;6 Importjavax.servlet.http.HttpServletRequest;7 ImportJavax.servlet.http.HttpServletResponse;8 9 ImportOrg.springframework.http.HttpStatus;Ten ImportOrg.springframework.web.filter.OncePerRequestFilter; One  A  Public classSessionfilterextendsOnceperrequestfilter { - @Override -     protected voiddofilterinternal (httpservletrequest request, httpservletresponse response, Filterchain Filterchain) the             throwsservletexception, IOException { -  -         //non-filtered URI -string[] Notfilter =NewString[] {"/user/touser", "/login", "User/tomain" }; +  -         //URI of the request +String URI =Request.getrequesturi (); A         //whether to filter at         BooleanDoFilter =true; -          for(String s:notfilter) { -             if(Uri.indexof (s)! =-1) { -                 //If the URI contains a non-filtered URI, it is not filtered -DoFilter =false; -                  Break; in             } -         } to  +         if(doFilter) { -             //Perform filtering the             //get the login entity from the session *Object obj = Request.getsession (). getattribute ("Temp_user"); $             if(NULL==obj) {Panax Notoginseng                 BooleanIsajaxrequest =isajaxrequest (request); -                 if(isajaxrequest) { theResponse.setcharacterencoding ("UTF-8"); +Response.senderror (HttpStatus.UNAUTHORIZED.value (), "You have been too long to operate, please refresh the page"); A                     return; the                 } +Response.sendredirect (".. /user/touser "); -                 return; $}Else { $                 //if the login entity exists in the session, continue - Filterchain.dofilter (request, response); -             } the}Else { -             //If filtering is not performed, continueWuyi Filterchain.dofilter (request, response); the         } -     } Wu  -     /** About * Determine if the AJAX request < feature description is detailed > $      *  -      * @paramRequest -      * @returnis true, no false -      * @see[Class, Class # method, Class # member] A      */ +      Public Static Booleanisajaxrequest (HttpServletRequest request) { theString Header = Request.getheader ("X-requested-with"); -         if(Header! =NULL&& "XMLHttpRequest". Equals (header)) $             return true; the         Else the             return false; the     } the}

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SPRINGMVC Sessionfilter Login Filter