如何用SpringMVC自定义注解和拦截器实现防止表单重复提交？

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java拦截器代码片段：javapackage com.iflytek.common.interceptor;

import java.lang.reflect.Method;import java.util.UUID;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.log4j.Logger;

public class InterceptorExample { private static final Logger logger=Logger.getLogger(InterceptorExample.class);

public void intercept(HttpServletRequest request, HttpServletResponse response, Object target, Method method, Object[] args) { String uuid=UUID.randomUUID().toString(); logger.info(Interceptor executed with UUID: + uuid); // 其他逻辑处理 }}

拦截器

package com.iflytek.common.interceptor; import java.lang.reflect.Method; import java.util.UUID; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.log4j.Logger; import org.springframework.web.method.HandlerMethod; import org.springframework.web.servlet.handler.HandlerInterceptorAdapter; public class TokenInterceptor extends HandlerInterceptorAdapter { private static final Logger LOG = Logger.getLogger(Token.class); @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { if (handler instanceof HandlerMethod) { HandlerMethod handlerMethod = (HandlerMethod) handler; Method method = handlerMethod.getMethod(); Token annotation = method.getAnnotation(Token.class); if (annotation != null) { String key = annotation.key(); boolean needSaveSession = annotation.save(); if (needSaveSession) { request.getSession(true).setAttribute("token" + key, UUID.randomUUID().toString()); } boolean needRemoveSession = annotation.remove(); if (needRemoveSession) { if (isRepeatSubmit(request, key)) { LOG.warn("please don't repeat submit,url:" + request.getServletPath()); return false; } request.getSession(true).removeAttribute("token" + key); } } return true; } else { return super.preHandle(request, response, handler); } } private boolean isRepeatSubmit(HttpServletRequest request, String key) { String serverToken = (String) request.getSession(true).getAttribute("token" + key); if (serverToken == null) { return true; } String clinetToken = request.getParameter("token" + key); if (clinetToken == null) { return true; } if (!serverToken.equals(clinetToken)) { return true; } return false; } } 注解

package com.iflytek.common.interceptor; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface Token { boolean save() default false; String key() default ""; boolean remove() default false; } 使用

@RequestMapping("/xzhf/toXshf.do") @Token(save=true,key="1") public String toHfJSP(……){ } @RequestMapping("/xzhf/saveXzhf.do") @ResponseBody @Token(remove=true,key="1") public void saveZxhf(……){ }