使用redis防止重复提交

其实主要思路是他的https://blog.csdn.net/u013378306/article/details/52944780

主要目前我的情况是，前后端分离的，前端没有session ，所以使用redis来存放数据。

自定义注解

package com.cdp.api.onboarding.interceptor;
 
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
 
/**
 * 一个用户 相同url 同时提交 相同数据 验证
 * @author Administrator
 *
 */
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface SameUrlData {
 
    
}

自定义拦截器

package com.cdp.api.onboarding.interceptor;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import com.alibaba.druid.util.IOUtils;
import com.cdp.api.common.util.CommonUtil;
import com.cdp.api.common.util.DateUtil;
import com.cdp.api.common.util.JedisUtil;
import com.cdp.api.common.util.StringUtil;

/**
 * 
 * @author Administrator
 * 
 */
public class SameUrlDataInterceptor extends HandlerInterceptorAdapter {

    private static final Logger logger = LoggerFactory
            .getLogger(CommonUtil.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();
            SameUrlData annotation = method.getAnnotation(SameUrlData.class);
            if (annotation != null) {
                if (repeatDataValidator(request)) {
                    logger.debug(DateUtil
                            .getTimeString_Now("yyyy-MM-dd HH:mm:ss")
                            + " -- 重复请求 -- ");
                    return false;
                }// 如果重复相同数据
                else
                    return true;
            }
            return true;
        } else {
            return super.preHandle(request, response, handler);
        }
    }

    /**
     * 验证同一个url数据是否相同提交 ,相同返回true
     * 
     * @param request
     * @return
     * @throws Exception
     */
    public boolean repeatDataValidator(HttpServletRequest request)
            throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                request.getInputStream()));
        // 判断body
        String body = IOUtils.read(reader);
        String url = request.getRequestURI();
        Map<String, String> map = new HashMap<String, String>();
        map.put(url, body);
        String nowUrlParams = map.toString();//

        String preUrlParams = JedisUtil.getFromRedis(url);
        if (StringUtil.isNullOrBlank(preUrlParams))// 如果上一个数据为null,表示还没有访问页面
        {
            // 扔redis
            JedisUtil.saveInRedis(url, nowUrlParams, 60);
            logger.debug(DateUtil.getTimeString_Now("yyyy-MM-dd HH:mm:ss")
                    + " -- 设置preUrlParams -- " + nowUrlParams);
            return false;
        } else// 否则，已经访问过页面
        {
            if (preUrlParams.toString().equals(nowUrlParams))// 如果上次url+数据和本次url+数据相同，则表示重复添加数据
            {
                logger.debug(DateUtil.getTimeString_Now("yyyy-MM-dd HH:mm:ss")
                        + " -- 重复提交preUrlParams -- ");
                return true;
            } else// 如果上次 url+数据 和本次url加数据不同，则不是重复提交
            {
                logger.debug(DateUtil.getTimeString_Now("yyyy-MM-dd HH:mm:ss")
                        + " -- 重新设置preUrlParams -- " + nowUrlParams);
                JedisUtil.saveInRedis(url, nowUrlParams, 60);
                return false;
            }

        }
    }

}

拦截器的配置

<mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**" />
            <mvc:exclude-mapping path="/login" />
            <mvc:exclude-mapping path="/token/get" />
            <mvc:exclude-mapping path="/file/**" />
            <mvc:exclude-mapping path="/wx/**" />
            <mvc:exclude-mapping path="/wxCompany/**" />
            <mvc:exclude-mapping path="/wxOnFamily/**" />
            <mvc:exclude-mapping path="/wxlogin/**" />
            <mvc:exclude-mapping path="/wxMaterial/**" />
            <mvc:exclude-mapping path="/wxOfferManagement/**" />
            <mvc:exclude-mapping path="/wxOnEmployee/**" />
            <mvc:exclude-mapping path="/wxOnEducation/**" />
            <mvc:exclude-mapping path="/wxOnTraining/**" />
            <mvc:exclude-mapping path="/wxOnWork/**" />
            <mvc:exclude-mapping path="/wxTeam/**" />
            <mvc:exclude-mapping path="/wxTemplatePage/**" />
            <mvc:exclude-mapping path="/wxWelcomePage/**" />
            <mvc:exclude-mapping path="/wxIdPhoto/**" />
            <mvc:exclude-mapping path="/offer/excel_offer/import" />
            <bean class="com.cdp.api.onboarding.interceptor.SameUrlDataInterceptor"></bean>
        </mvc:interceptor>

ps，使用的时候要在controller加上注解

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