技术汇总：第九章：任务调度SpringTask

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.2.xsd">
<context:component-scan base-package="com.pinyougou.task"/>
    <task:annotation-driven/>
</beans>

@Component
public class SeckillTask {
/**
 * 刷新秒杀商品
 */
@Scheduled(cron="* * * * * ?")
public void refreshSeckillGoods(){
System.out.println("执行了任务调度"+new Date());
}
}

/**
 * 刷新秒杀商品
 */
@Scheduled(cron="0 * * * * ?")
public void refreshSeckillGoods(){
System.out.println("执行了任务调度"+new Date());
//查询所有的秒杀商品键集合
List ids = new ArrayList( redisTemplate.boundHashOps("seckillGoods").keys());
//查询正在秒杀的商品列表
TbSeckillGoodsExample example=new TbSeckillGoodsExample();
Criteria criteria = example.createCriteria();
criteria.andStatusEqualTo("1");//审核通过
criteria.andStockCountGreaterThan(0);//剩余库存大于0
criteria.andStartTimeLessThanOrEqualTo(new Date());//开始时间小于等于当前时间
criteria.andEndTimeGreaterThan(new Date());//结束时间大于当前时间
criteria.andIdNotIn(ids);//排除缓存中已经有的商品
List<TbSeckillGoods> seckillGoodsList= seckillGoodsMapper.selectByExample(example);
//装入缓存
for( TbSeckillGoods seckill:seckillGoodsList ){
redisTemplate.boundHashOps("seckillGoods").put(seckill.getId(), seckill);
}
System.out.println("将"+seckillGoodsList.size()+"条商品装入缓存");
}

/**
 * 移除秒杀商品
 */
@Scheduled(cron="* * * * * ?")
public void removeSeckillGoods(){
System.out.println("移除秒杀商品任务在执行");
//扫描缓存中秒杀商品列表，发现过期的移除
List<TbSeckillGoods> seckillGoodsList = redisTemplate.boundHashOps("seckillGoods").values();
for( TbSeckillGoods seckill:seckillGoodsList ){
if(seckill.getEndTime().getTime()<new Date().getTime()  ){//如果结束日期小于当前日期，则表示过期
seckillGoodsMapper.updateByPrimaryKey(seckill);//向数据库保存记录
redisTemplate.boundHashOps("seckillGoods").delete(seckill.getId());//移除缓存数据
System.out.println("移除秒杀商品"+seckill.getId());
}
}
System.out.println("移除秒杀商品任务结束");
}