Spring MVC拦截器通过注解方式实现防止表单重复提交

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

<bean class="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. 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

                <input type="hidden" name="token" value="${token}">