详解Springboot如何通过注解实现接口防刷

/**
     * 测试防刷
     *
     * @param request
     * @return
     */
    @ResponseBody
    @GetMapping(value = "/testPrevent")
    @Prevent //加上该注解即可实现短信防刷(默认一分钟内不允许重复调用，支持扩展、配置）
    public Response testPrevent(TestRequest request) {
        return Response.success("调用成功");
    }

package com.zetting.aop;

import java.lang.annotation.*;

/**
 * 接口防刷注解
 * 使用：
 * 在相应需要防刷的方法上加上
 * 该注解，即可
 *
 * @author: zetting
 * @date:2018/12/29
 */
@Documented
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface Prevent {

    /**
     * 限制的时间值（秒）
     *
     * @return
     */
    String value() default "60";

    /**
     * 提示
     */
    String message() default "";

    /**
     * 策略
     *
     * @return
     */
    PreventStrategy strategy() default PreventStrategy.DEFAULT;
}

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;

/**
 * 防刷切面实现类
 *
 * @author: zetting
 * @date: 2018/12/29 20:27
 */
@Aspect
@Component
public class PreventAop {
    private static Logger log = LoggerFactory.getLogger(PreventAop.class);

    @Autowired
    private RedisUtil redisUtil;


    /**
     * 切入点
     */
    @Pointcut("@annotation(com.zetting.aop.Prevent)")
    public void pointcut() {
    }


    /**
     * 处理前
     *
     * @return
     */
    @Before("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]入参不允许为空");
        }

        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("无效的策略");
        }
    }


    /**
     * 默认处理方式
     *
     * @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 + "秒内不允许重复请求";
            throw new BusinessException(message);
        }
    }


    /**
     * 对象转换为base64字符串
     *
     * @param obj 对象值
     * @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);
    }
}

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;

/**
 * 切面实现入参校验
 */
@RestController
public class MyController {

    /**
     * 测试防刷
     *
     * @param request
     * @return
     */
    @ResponseBody
    @GetMapping(value = "/testPrevent")
    @Prevent
    public Response testPrevent(TestRequest request) {
        return Response.success("调用成功");
    }


    /**
     * 测试防刷
     *
     * @param request
     * @return
     */
    @ResponseBody
    @GetMapping(value = "/testPreventIncludeMessage")
    @Prevent(message = "10秒内不允许重复调多次", value = "10")//value 表示10表示10秒
    public Response testPreventIncludeMessage(TestRequest request) {
        return Response.success("调用成功");
    }
}