一、文档:
【cron表达式在线生成器】https://cron.qqe2.com/
二、案例:
@EnableScheduling //开启任务调度
文章来源:https://www.toymoban.com/news/detail-676733.html
package com.sky.task;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
import java.util.List;
/**
* 定时任务类,定时处理订单状态
*/
@Component
@Slf4j
public class OrderTask {
@Autowired
private OrderMapper orderMapper;
/**
* 处理超时订单的方法
*/
@Scheduled(cron = "0 * * * * ? ") //每分钟触发一次
public void processTimeoutOrder(){
log.info("定时处理超时订单:{}", LocalDateTime.now());
LocalDateTime time = LocalDateTime.now().plusMinutes(-15);
// select * from orders where status = ? and order_time < (当前时间 - 15分钟)
List<Orders> ordersList = orderMapper.getByStatusAndOrderTimeLT(Orders.PENDING_PAYMENT, time);
if(ordersList != null && ordersList.size() > 0){
for (Orders orders : ordersList) {
orders.setStatus(Orders.CANCELLED);
orders.setCancelReason("订单超时,自动取消");
orders.setCancelTime(LocalDateTime.now());
orderMapper.update(orders);
}
}
}
/**
* 处理一直处于派送中状态的订单
*/
@Scheduled(cron = "0 0 1 * * ?") //每天凌晨1点触发一次
public void processDeliveryOrder(){
log.info("定时处理处于派送中的订单:{}",LocalDateTime.now());
LocalDateTime time = LocalDateTime.now().plusMinutes(-60);
List<Orders> ordersList = orderMapper.getByStatusAndOrderTimeLT(Orders.DELIVERY_IN_PROGRESS, time);
if(ordersList != null && ordersList.size() > 0){
for (Orders orders : ordersList) {
orders.setStatus(Orders.COMPLETED);
orderMapper.update(orders);
}
}
}
}
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