SpringBoot一個(gè)注解,實(shí)現(xiàn)接口防刷
點(diǎn)擊上方“Java技術(shù)江湖”,選擇“設(shè)為星標(biāo)”
回復(fù)”666“獲取全網(wǎng)最熱的Java核心知識點(diǎn)整理
本文介紹一種極簡潔、靈活通用接口防刷實(shí)現(xiàn)方式、通過在需要防刷的方法加上@Prevent 注解即可實(shí)現(xiàn)短信防刷;
使用方式大致如下:
/*** 測試防刷** @param request* @return*///加上該注解即可實(shí)現(xiàn)短信防刷(默認(rèn)一分鐘內(nèi)不允許重復(fù)調(diào)用,支持?jǐn)U展、配置)public Response testPrevent(TestRequest request) {return Response.success("調(diào)用成功");}
目錄
實(shí)現(xiàn)防刷切面PreventAop.java
使用防刷切面
演示
1、實(shí)現(xiàn)防刷切面PreventAop.java
大致邏輯為:定義一切面,通過@Prevent注解作為切入點(diǎn)、在該切面的前置通知獲取該方法的所有入?yún)⒉⑵銪ase64編碼,將入?yún)ase64編碼+完整方法名作為redis的key,入?yún)⒆鳛閞eids的value,@Prevent的value作為redis的expire,存入redis;
每次進(jìn)來這個(gè)切面根據(jù)入?yún)ase64編碼+完整方法名判斷redis值是否存在,存在則攔截防刷,不存在則允許調(diào)用;
1.1 定義注解Prevent
package com.zetting.aop;import java.lang.annotation.*;/*** 接口防刷注解* 使用:* 在相應(yīng)需要防刷的方法上加上* 該注解,即可** @author: zetting*/public Prevent {/*** 限制的時(shí)間值(秒)** @return*/String value() default "60";/*** 提示*/String message() default "";/*** 策略** @return*/PreventStrategy strategy() default PreventStrategy.DEFAULT;}
1.2 實(shí)現(xiàn)防刷切面PreventAop
package com.zetting.aop;import com.alibaba.fastjson.JSON;import com.zetting.common.BusinessException;import com.zetting.util.RedisUtil;import org.aspectj.lang.JoinPoint;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;import org.aspectj.lang.reflect.MethodSignature;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;import org.springframework.util.StringUtils;import java.lang.reflect.Method;import java.util.Base64;/*** 防刷切面實(shí)現(xiàn)類** @author: zetting*/public class PreventAop {private static Logger log = LoggerFactory.getLogger(PreventAop.class);private RedisUtil redisUtil;/*** 切入點(diǎn)*/("@annotation(com.zetting.aop.Prevent)")public void pointcut() {}/*** 處理前** @return*/("pointcut()")public void joinPoint(JoinPoint joinPoint) throws Exception {String requestStr = JSON.toJSONString(joinPoint.getArgs()[0]);if (StringUtils.isEmpty(requestStr) || requestStr.equalsIgnoreCase("{}")) {throw new BusinessException("[防刷]入?yún)⒉辉试S為空");}MethodSignature methodSignature = (MethodSignature) joinPoint.getSignature();Method method = joinPoint.getTarget().getClass().getMethod(methodSignature.getName(),methodSignature.getParameterTypes());Prevent preventAnnotation = method.getAnnotation(Prevent.class);String methodFullName = method.getDeclaringClass().getName() + method.getName();entrance(preventAnnotation, requestStr,methodFullName);return;}/*** 入口** @param prevent* @param requestStr*/private void entrance(Prevent prevent, String requestStr,String methodFullName) throws Exception {PreventStrategy strategy = prevent.strategy();switch (strategy) {case DEFAULT:defaultHandle(requestStr, prevent,methodFullName);break;default:throw new BusinessException("無效的策略");}}/*** 默認(rèn)處理方式** @param requestStr* @param prevent*/private void defaultHandle(String requestStr, Prevent prevent,String methodFullName) throws Exception {String base64Str = toBase64String(requestStr);long expire = Long.parseLong(prevent.value());String resp = redisUtil.get(methodFullName+base64Str);if (StringUtils.isEmpty(resp)) {redisUtil.set(methodFullName+base64Str, requestStr, expire);} else {String message = !StringUtils.isEmpty(prevent.message()) ? prevent.message() :expire + "秒內(nèi)不允許重復(fù)請求";throw new BusinessException(message);}}/*** 對象轉(zhuǎn)換為base64字符串** @param obj 對象值* @return base64字符串*/private String toBase64String(String obj) throws Exception {if (StringUtils.isEmpty(obj)) {return null;}Base64.Encoder encoder = Base64.getEncoder();byte[] bytes = obj.getBytes("UTF-8");return encoder.encodeToString(bytes);}}
注:以上只展示核心代碼、其他次要代碼(例如redis配置、redis工具類等)可下載源碼查閱
2、使用防刷切面
在MyController 使用防刷
package com.zetting.modules.controller;import com.zetting.aop.Prevent;import com.zetting.common.Response;import com.zetting.modules.dto.TestRequest;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.RestController;/*** 切面實(shí)現(xiàn)入?yún)⑿r?yàn)*/@RestControllerpublic class MyController {/*** 測試防刷** @param request* @return*/@ResponseBody@GetMapping(value = "/testPrevent")@Preventpublic Response testPrevent(TestRequest request) {return Response.success("調(diào)用成功");}/*** 測試防刷** @param request* @return*/@ResponseBody@GetMapping(value = "/testPreventIncludeMessage")@Prevent(message = "10秒內(nèi)不允許重復(fù)調(diào)多次", value = "10")//value 表示10表示10秒public Response testPreventIncludeMessage(TestRequest request) {return Response.success("調(diào)用成功");}}
3、演示

gitee 源碼:https://gitee.com/Zetting/my-gather/tree/master/springboot-aop-prevent

震驚,Java+ lua = 王炸

Spring Boot 整合 ElasticSearch 這么簡單?

關(guān)注公眾號【Java技術(shù)江湖】后回復(fù)“PDF”即可領(lǐng)取200+頁的《Java工程師面試指南》
強(qiáng)烈推薦,幾乎涵蓋所有Java工程師必知必會(huì)的知識點(diǎn),不管是復(fù)習(xí)還是面試,都很實(shí)用。

