Interceptor Springmvc prevent form repeat commit "2"

"Reference Blog: http://my.oschina.net/mushui/blog/143397" principle: In the new page in the session to save token random code, when saved to verify, after the deletion, When you click Save again because the server side of the session no longer exists, all can not be verified through.

1. New Annotations:

/** * <p> * 防止重复提交注解，用于方法上<br/> * 在新建页面方法上，设置needSaveToken()为true，此时拦截器会在Session中保存一个token， * 同时需要在新建的页面中添加 * <input type="hidden" name="token" value="${token}"> * <br/> * 保存方法需要验证重复提交的，设置needRemoveToken为true * 此时会在拦截器中验证是否重复提交 * </p> * @author: chuanli * @date: 2013-6-27上午11:14:02 * */@Target(ElementType.METHOD)@Retention(RetentionPolicy.RUNTIME)public @interface AvoidDuplicateSubmission {    boolean needSaveToken() default false;    boolean needRemoveToken() default false;}

2. New Interceptor

/** * <p> * Prevent duplicate submission filter * </p> * *@author: Chuanli *@date: 2013-6-27 11:19:05 * *PublicClass Avoidduplicatesubmissioninterceptor Extends Handlerinterceptoradapter{private staticFinal Logger LOG = Logger.getlogger (avoidduplicatesubmissioninterceptor.Class);@Overridepublic boolean prehandle (HttpServletRequest request, httpservletresponse response, Object handler) throws Exception {use R user = Userutil.getuser ();if (User! =NULL) {Handlermethod Handlermethod = (handlermethod) handler; Method method = Handlermethod.getmethod (); Avoidduplicatesubmissionannotation = Method.getannotation (avoidduplicatesubmission.Class);if (Annotation! =NULL) {Boolean needsavesession =Annotation.needsavetoken ();if (needsavesession) {request.getsession (False). SetAttribute ("Token", Tokenprocessor.getinstance (). Generatetoken ()); } Boolean needremovesession =Annotation.needremovetoken ();if (needremovesession) {if (Isrepeatsubmit (Request)) {Log.warn ("Please don ' t repeat Submit,[user:" + user.getusername () +", url:" + request.getservletpath () +"]");ReturnFalse } request.getsession (False). RemoveAttribute ("token"); } } }Returntrue;} Private Boolean Isrepeatsubmit (HttpServletRequest request) {String servertoken = (string) request.getsession (  False). getattribute ("token"); if (Servertoken = = null) { return true;} String Clinettoken = Request.getparameter ("token"); if (Clinettoken = = null) { return true;} if (!servertoken.equals (Clinettoken)) { return true;} return false;}}                 

3. Configure in Spring

<beanclass="Org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping" ><Property Name="Interceptors"> <List> <Bean Class="Com.sohu.tv.crm.aop.UserLogInterceptor"/> <Bean Class="Com.sohu.tv.crm.aop.AvoidDuplicateSubmissionInterceptor"/> </list> </Property></bean> 

4. Add annotations to the relevant methods:

@RequestMapping("/save") @AvoidDuplicateSubmission(needRemoveToken = true)    public synchronized ModelAndView save(ExecutionUnit unit, HttpServletRequest request, HttpServletResponse response)            throws Exception {@RequestMapping("/edit") @AvoidDuplicateSubmission(needSaveToken = true) public ModelAndView edit(Integer id, HttpServletRequest request) throws Exception {

5. Add <input type= "hidden" name= "token" value= "${token" in the new page >

Interceptor Springmvc prevent form repeat commit "2"