SpringBoot如何实现一个Redis限流注解

        <!-- 引入SpringBoot Aop依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

package com.hhh.springai_test.annotation;

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 RedisLimiting {

    int number() default 3;

    int time() default 60;

    String message() default "请求过于频繁，请稍后再试";


}

package com.hhh.springai_test.aop;

import cn.hutool.crypto.digest.MD5;
import com.hhh.springai_test.annotation.RedisLimiting;
import com.hhh.springai_test.common.ErrorCode;
import com.hhh.springai_test.exception.BusinessException;
import com.hhh.springai_test.utils.RedisUtils;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.lang.reflect.Parameter;

@Aspect
@Component("redisLimitingAspect")
@Slf4j
public class RedisLimitingAspect {

    @Autowired
    private RedisUtils redisUtils;

    @Around("@annotation(com.hhh.springai_test.annotation.RedisLimiting)")  // 只拦截带 @redisLimiting 的方法
    public Object redisLimiting(ProceedingJoinPoint joinPoint) throws Throwable {
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        Method method = signature.getMethod(); // 直接获取被代理的方法
        // 获取 @redisLimiting 注解
        RedisLimiting annotation = method.getAnnotation(RedisLimiting.class);
        if (annotation == null) {
            return joinPoint.proceed(); // 没有注解，直接执行方法
        }
        int limit = annotation.number(); // 限制次数
        int expire = annotation.time();  // 过期时间
        String message = annotation.message();

        log.info("拦截方法: {}, 限流 key: {}, 限流次数: {}, 过期时间: {} 秒",
                method.getName(), limit, expire);

        // 执行限流逻辑
        boolean isAllowed = checkRedisLimiting(method, joinPoint.getArgs(), limit, expire);
        if (!isAllowed) {
            throw new BusinessException(ErrorCode.BUSY_ERROR,message);
        }

        return joinPoint.proceed(); // 执行原方法
    }

    private boolean checkRedisLimiting(Method method, Object[] args, int limit, int expire) {
        // 生成 Redis Key
        String redisKey = generateRedisKey(method, args);
        // 查询 Redis 是否存在
        Object o = redisUtils.get(redisKey);
        if (o == null) {
            redisUtils.setex(redisKey, 1, expire); // 初始值设为1，并设置过期时间
            return true;
        } else {
            int count = Integer.parseInt(o.toString());
            if (count >= limit) {
                return false; // 超过限制
            } else {
                redisUtils.increment(redisKey, 1); // 递增计数
                return true;
            }
        }
    }

    private String generateRedisKey(Method method, Object[] args) {
        StringBuilder builder = new StringBuilder();
        builder.append(method.getDeclaringClass().getName()).append(":").append(method.getName()).append(":");
        Parameter[] parameters = method.getParameters();
        for (int i = 0; i < parameters.length; i++) {
            builder.append(parameters[i].getName()).append("=").append(args[i]).append("&");
        }
        return MD5.create().digestHex16(builder.toString()); // 生成唯一 Redis Key
    }
}

@GetMapping("/getAllModel")
    @RedisLimiting(number = 3, time = 60,message = "不要再请求我的获取aiModel方法了")
    public BaseResponse<List<AiModelVO>> getAllModel() {
        return ResultUtils.success(aiModelService.getAllModel());
    }