后端学习笔记-Spring Task

Spring Task

介绍

cron表达式

cron表达式生成网站

使用

/**
 *  自定义定时任务类
 */
@Component
@Slf4j
public class MyTask {
    /**
     * 测试定时任务
     */
    @Scheduled(cron = "0/5 * * * * ? ")
    public void myTask(){
        log.info("定时任务开始执行:{}",new Date());
    }
}

实例

定时处理订单状态

/**
 * 订单状态定时任务
 */
@Component
@Slf4j
public class OrderTask {

    @Autowired
    private OrderMapper orderMapper;

    /**
     * 处理超时订单
     */
    @Scheduled(cron = "0 * * * * ? ")
    public void processTimeoutOrder() {
        log.info("处理超时订单:{}", LocalDateTime.now());
        List<Orders> orderlist = orderMapper.getByStatusAndOrderTime(Orders.PENDING_PAYMENT,
                LocalDateTime.now().plusMinutes(-15));
        if(orderlist != null && orderlist.size() > 0){
            List<Long> ids = orderlist.stream().map(x->{
                return x.getId();
            }).collect(Collectors.toList());
            orderMapper.updateStatusCancelByIds(ids, Orders.CANCELLED,MessageConstant.ORDER_PAYMENT_TIMEOUT,LocalDateTime.now());
        }
    }

    /**
     * 处理一直派送订单
     */
    @Scheduled(cron = "0 0 1 * * ? ")
    public void processCompletionOrder() {
        log.info("定时处理派送订单:{}", LocalDateTime.now());
        List<Orders> orderlist = orderMapper.getByStatusAndOrderTime(Orders.DELIVERY_IN_PROGRESS,
                LocalDateTime.now().plusMinutes(-60));
        if(orderlist != null && orderlist.size() > 0){
            List<Long> ids = orderlist.stream().map(x->{
                return x.getId();
            }).collect(Collectors.toList());
            orderMapper.updateStatusCompletedByIds(ids, Orders.COMPLETED,LocalDateTime.now());
        }
    }
}