若依框架实现后端防止用户重复点击

基于自定义注解、切面、Redis实现

1. 添加自定义注解：

代码放置位置：com/ruoyi/common/annotation/RepeatClick.java

time: 时间默认0;

unit：单位默认 秒;

key: 默认空字符串

package com.ruoyi.framework.annotation;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.concurrent.TimeUnit;

/**
 * @author yizhi
 */
@Target({ElementType.FIELD, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface RepeatClick {
	/**
	 * 时间
	 */
    int time() default 0;

	/**
	 * 时间单位，默认秒
	 */
	TimeUnit unit() default TimeUnit.SECONDS;

	/**
	 * 默认会校验的数据
	 */
	String key() default "";
}

2. 添加自定义切面：

代码放置位置：com/ruoyi/framework/aspectj/RepeatClickAspect.java

基于注解和Redis实现防止重复点击

package com.ruoyi.framework.aspectj;

import com.ruoyi.common.annotation.RepeatClick;
import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.common.utils.SecurityUtils;
import lombok.extern.log4j.Log4j2;
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.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.ObjectUtils;

import javax.annotation.Resource;
import java.util.UUID;

/**
 * @author yizhi
 */
@Aspect
@Component
@Log4j2
public class RepeatClickAspect {
    @Resource
    private RedisTemplate<String, Object> redisTemplate;

    /**
     * 方式一
     *
     * @param joinPoint
     * @param repeatClick
     * @return
     * @throws Throwable
     */
    @Around("@annotation(repeatClick)")
    public Object repeatClick(ProceedingJoinPoint joinPoint, RepeatClick repeatClick) throws Throwable {
        System.out.println("进入切面了");
        Object[] args = joinPoint.getArgs();
        // 重复点击注解为空  跳过
        if (ObjectUtils.isEmpty(repeatClick)) {
            return joinPoint.proceed(args);
        }
        // 使用错误提示
        if (ObjectUtils.isEmpty(repeatClick.key()) || repeatClick.time() == 0) {
            log.error("注意：存在自定义注解，使用异常：请检查是否设置key, time, unit");
            return joinPoint.proceed(args);
        }
        String repeatClickKey = repeatClick.key() + SecurityUtils.getLoginUser().getUserId();
        if (Boolean.TRUE.equals(redisTemplate.hasKey(repeatClickKey))) {
            return AjaxResult.error("请勿重复点击");
        }
        redisTemplate.opsForValue().set(repeatClickKey, UUID.randomUUID().toString());
        redisTemplate.expire(repeatClickKey, repeatClick.time(), repeatClick.unit());
        return joinPoint.proceed(args);
    }

    /**
     * 方式二
     *
     * @param joinPoint
     * @return
     * @throws Throwable
     */
//    @Around("@annotation(com.ruoyi.framework.annotation.RepeatClick)")
//    public Object repeatClick(ProceedingJoinPoint joinPoint) throws Throwable {
//        System.out.println("进入切面了");
//        Object[] args = joinPoint.getArgs();
//        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
//        RepeatClick repeatClick = signature.getMethod().getAnnotation(RepeatClick.class);
//        // 重复点击注解为空  跳过
//        if (ObjectUtils.isEmpty(repeatClick)) {
//            return joinPoint.proceed(args);
//        }
//        // 使用错误提示
//        if (ObjectUtils.isEmpty(repeatClick.key()) || repeatClick.time() == 0) {
//            log.error("注意：存在自定义注解，使用异常：请检查是否设置key, time, unit");
//            return joinPoint.proceed(args);
//        }
//        String repeatClickKey = repeatClick.key() + SecurityUtils.getLoginUser().getUserId();
//        if (Boolean.TRUE.equals(redisTemplate.hasKey(repeatClickKey))) {
//            return AjaxResult.error("请勿重复点击");
//        }
//        redisTemplate.opsForValue().set(repeatClickKey, UUID.randomUUID().toString());
//        redisTemplate.expire(repeatClickKey, repeatClick.time(), repeatClick.unit());
//        return joinPoint.proceed(args);
//    }
}

3. 最后在controller中添加注解进行测试

key: 我给自己规定填写 —完整接口名称（因为唯一）

time和unit合起来一起使用，unit默认是秒，那这个就是10秒

如果unit 设置为 分钟，那这个就是十分钟

@RepeatClick(key = "bsLable.ceshi", time = 10)

@RepeatClick(key = "bsLable.ceshi", time = 10, unit = TimeUnit.MINUTES)

4. 自行查看测试结果