2024Java springboot mybatis-flex 根据数据表时间开启定时任务

1.数据表自定义的时间（我要11和00分开 ）

2.启动类添加定时任务逻辑

@SpringBootApplication
@MapperScan("com.test.mapper")
// 开启定时任务
@EnableScheduling
public class TestApplication {
    //引入自己的mapper层或service层
    @Resource
    private SetUpMapper setUpMapper;

    public static void main(String[] args) {
        SpringApplication.run(TestApplication.class, args);
    }

    //定时任务  @PostConstruct不要丢了
    @PostConstruct
    public void scheduleTasks() {
        ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(2);
        //获取时间点 11:00
        String morning = setUpMapper.selectOneById(5).getParameter().split("-")[1];

         //定时任务业务
        //获取小时11，Integer.parseInt(morning.split(":")[0] 
         //获取分钟00，Integer.parseInt(morning.split(":")[1] 
          //定时任务就是，11点00分开启定时任务
        scheduler.schedule(() -> {
            //定时任务业务，这是 简单测试，到点打印下班啦
           System.ou.println("下班啦");
        }, getTimeUntilNextExecution(Integer.parseInt(morning.split(":")[0]), Integer.parseInt(morning.split(":")[1])), TimeUnit.SECONDS);

       

    /**
     * 计算距离下一个指定时间点的时间间隔（单位：秒）
     *
     * @param hour
     * @param minute
     * @return
     */
    private long getTimeUntilNextExecution(int hour, int minute) {
        Calendar now = Calendar.getInstance();
        Calendar nextExecutionTime = Calendar.getInstance();
        nextExecutionTime.set(Calendar.HOUR_OF_DAY, hour);
        nextExecutionTime.set(Calendar.MINUTE, minute);
        nextExecutionTime.set(Calendar.SECOND, 0);

        if (now.after(nextExecutionTime)) {
            // 如果当前时间已经过了指定时间点，则推迟到第二天
            nextExecutionTime.add(Calendar.DAY_OF_MONTH, 1); 
        }

        return (nextExecutionTime.getTimeInMillis() - now.getTimeInMillis()) / 1000;
    }


}