目录

一、Spring Task_介绍

二、Spring Task_cron表达式

1.cron表达式在线生成器：https://cron.qqe2.com/

三、订单状态定时处理

1.SkyApplication.java

2.OrderTask.java

一、Spring Task_介绍

二、Spring Task_cron表达式

1.cron表达式在线生成器：https://cron.qqe2.com/

三、订单状态定时处理

1.SkyApplication.java

主要变动

@EnableScheduling  //开启定时任务注解

package com.sky;

import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@SpringBootApplication
@Slf4j
@EnableScheduling  //开启定时任务注解
@EnableTransactionManagement //开启注解方式的事务管理
@EnableCaching  //开启spring cache缓存注解功能
public class SkyApplication {
    public static void main(String[] args) {
        SpringApplication.run(SkyApplication.class, args);
        log.info("server started");
    }
}

2.OrderTask.java

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;

@Component
@Slf4j
public class OrderTask {
    @Autowired
    private OrderMapper orderMapper;

    // 定时处理超时订单
    @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);
        // 每分钟查询当前超时订单
        // 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("订单已超时,系统已自动取消!");
                orders.setCancelTime(LocalDateTime.now());

                orderMapper.update(orders);
            }
        }
    }

    // 定时处理一直派送中的订单
    @Scheduled(cron = "0 0 1 * * ?")  //每天凌晨一点触发一次
    //@Scheduled(cron = "0/5 * * * * ?")
    public void processDeliveryOrder(){
        log.info("定时处理一直派送中的订单:{}",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);
            }
        }

        log.info("凌晨一点检查未完成的订单,系统已自动完成!");

    }


}