Spring MVC攔截器+註解方式實現防止表單重複提交

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原 Spring MVC攔截器+註解方式實現防止表單重複提交

mushui

• 發佈時間: 2013/07/09 13:12
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原理：在新建頁面中Session保存token隨機碼，當保存時驗證，經過後刪除，當再次點擊保存時因爲服務器端的Session中已經不存在了，全部沒法驗證經過。

 

1.新建註解：

 

/**
 * <p>
 * 防止重複提交註解，用於方法上<br/>
 * 在新建頁面方法上，設置needSaveToken()爲true，此時攔截器會在Session中保存一個token，
 * 同時須要在新建的頁面中添加
 * <input type="hidden" name="token" value="${token}">
 * <br/>
 * 保存方法須要驗證重複提交的，設置needRemoveToken爲true
 * 此時會在攔截器中驗證是否重複提交
 * </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. 新建攔截器

 

/**
 * <p>
 * 防止重複提交過濾器
 * </p>
 *
 * @author: chuanli
 * @date: 2013-6-27上午11:19:05
 */
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. 在相關方法中加入註解：

 

@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.在新建頁面中加入

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