Spring MVC拦截器通过注解方式实现防止表单重复提交

谁借莪１个温暖的怀抱￠ 2022-07-15 02:56 234阅读 0赞

1.新建注解：

/** * 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 * */ @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface AvoidDuplicateSubmission { boolean needSaveToken() default false; boolean needRemoveToken() default false; }

2. 新建拦截器

/** * 防止重复提交过滤器 */ public class AvoidDuplicateSubmissionInterceptor extends HandlerInterceptorAdapter { private static final Logger LOG = Logger.getLogger(AvoidDuplicateSubmissionInterceptor.class); @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { User user = UserUtil.getUser(); if (user != null) { HandlerMethod handlerMethod = (HandlerMethod) handler; Method method = handlerMethod.getMethod(); AvoidDuplicateSubmission annotation = 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() + "]"); return false; } request.getSession(false).removeAttribute("token"); } } } return true; } 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. 在Spring中配置

4. 在相关方法中加入注解：

@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.在新建页面中加入