【springboot】springboot定时任务：

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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

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 {@Autowiredprivate 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);}}}
}