Springboot使用Quartz定时任务删除redis中的物品

一. 导入依赖

<dependency>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-quartz</artifactId>
     </dependency>

二. 模型数据

package io.coderyeah.ymcc.dto;

import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;

import java.util.Date;

/**
 * @author lqs
 * @date 2022/11/6 10:10
 */
@Data
public class GoodsDTO {
    // 主键
    private Long id;
    // 商品数量
    private Integer num;
    // 商品名称
    private String name;
    // 用户
    private Long userId;
    // 当前时间
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private Long time = new Date().getTime();
}

三. 自定义redis模板配置

package io.coderyeah.ymcc.config;

import com.alibaba.fastjson.support.spring.GenericFastJsonRedisSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import javax.annotation.Resource;

//缓存的配置
@Configuration
public class RedisConfig {

    @Resource
    private RedisConnectionFactory factory;


    //使用JSON进行序列化
    @Bean
    public RedisTemplate<Object, Object> redisTemplate() {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();

        redisTemplate.setConnectionFactory(factory);
        //JSON格式序列化
        GenericFastJsonRedisSerializer serializer = new GenericFastJsonRedisSerializer();
         //key的序列化
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        //value的序列化
        redisTemplate.setValueSerializer(serializer);
        //hash结构key的序列化
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        //hash结构value的序列化
        redisTemplate.setHashValueSerializer(serializer);
        return redisTemplate;
    }

} 

yml配置

sue:
  spring:
    quartz:
      cron: "*/10 * * * * ?" # [秒] [分] [小时] [日] [月] [周] [年] 每隔5秒执行一次

四. Quartz配置

1. 定时任务代码功能

   package io.coderyeah.ymcc.quartz;
   
   import com.alibaba.fastjson2.JSON;
   import io.coderyeah.ymcc.dto.GoodsDTO;
   import lombok.extern.slf4j.Slf4j;
   import org.quartz.JobExecutionContext;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.data.redis.core.RedisTemplate;
   import org.springframework.scheduling.quartz.QuartzJobBean;
   
   import java.util.List;
   import java.util.Set;
   
   /**
    * @author lqs
    * @date 2022/11/6 11:05
    */
   @Slf4j
   public class QuartzCartJob extends QuartzJobBean {
       @Autowired
       private RedisTemplate<Object, Object> redisTemplate;
   
       @Override
       protected void executeInternal(JobExecutionContext context) {
           // 每隔10秒执行一次
           // 获取redis中所有的商品
           Set<Object> keys = redisTemplate.keys(("cache:goods:*"));// 获取所有key
           assert keys != null;
           keys.forEach(key -> {
               // 遍历每一个key 获取当前key的所有值
               List<Object> values = redisTemplate.opsForHash().values(key);
               List<GoodsDTO> goodsDTOS = JSON.parseArray(JSON.toJSONString(values), GoodsDTO.class);
               // 遍历货品
               goodsDTOS.forEach(goodsDTO -> {
                   // 判断存储时间是否大于一分钟
                   if (System.currentTimeMillis() - goodsDTO.getTime() > 1000 * 60) {
                       // 删除此物品
                       redisTemplate.opsForHash().delete(key, goodsDTO.getId().toString());
                       log.info("定时删除成功");
                   }
               });
           });
           System.out.println(keys);
   
           String userName = (String) context.getJobDetail().getJobDataMap().get("userName");
           System.out.println("userName:" + userName);
       }
   }

2. 配置执行

   package io.coderyeah.ymcc.quartz;
   
   import org.quartz.*;
   import org.springframework.beans.factory.annotation.Value;
   import org.springframework.context.annotation.Bean;
   import org.springframework.context.annotation.Configuration;
   
   /**
    * @author lqs
    * @date 2022/11/6 11:07
    */
   @Configuration
   public class QuartzConfig {
       @Value("${sue.spring.quartz.cron}")
       private String cron;
   
       /**
        * 创建定时任务
        */
       @Bean
       public JobDetail quartzCartJobDetail() {
           JobDetail jobDetail = JobBuilder.newJob(QuartzCartJob.class)
                   .withIdentity("quartzCartJobDetail", "QUARTZ_CART")
                   .usingJobData("userName", "coderyeah")
                   .storeDurably()
                   .build();
           return jobDetail;
       }
   
       /**
        * 创建触发器
        */
       @Bean
       public Trigger quartzCartJobTrigger() {
           //每隔5秒执行一次
           CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(cron);
           //创建触发器
           Trigger trigger = TriggerBuilder.newTrigger()
                   .forJob(quartzCartJobDetail())
                   .withIdentity("quartzCartJobTrigger", "QUARTZ_CART_JOB_TRIGGER")
                   .withSchedule(cronScheduleBuilder)
                   .build();
           return trigger;
       }
   }