springboot实现定时任务的四种方式小结

public class TimerTask extends java.util.TimerTask{ 
    @Override
    public void run() {
        //这里执行定时任务内容
        System.out.println("+++++++");
    }    
}

public class TimerTest {
    
    public static void main(String[] args) {
        Timer timer = new Timer();
        TimerTask noticeTask = new TimerTask();
        timer.schedule(noticeTask,0,2000);
        timer.cancel();
        System.out.println("结束");    
    }
 
}

public class MyScheduledExecutor implements Runnable{
    
    private String jobName;
    
    MyScheduledExecutor() {
        
    }
    
    MyScheduledExecutor(String jobName) {
        this.jobName = jobName;
    }
 
    @Override
    public void run() {
        System.out.println(jobName + " is running");
    }
 
}

public class MyScheduledExecutorService {
 
    public static void main(String[] args) {
        
        long initialDelay = 3;
        long period = 1;
 
            
            ScheduledExecutorService service = Executors.newScheduledThreadPool(2);
        
        
        service.scheduleAtFixedRate(new MyScheduledExecutor("job1"), initialDelay, period, TimeUnit.SECONDS);
        
        
        service.scheduleWithFixedDelay(new MyScheduledExecutor("job2"), initialDelay, period, TimeUnit.SECONDS);
    }
    
}

public class ScheduledExceutorTest2 extends TimerTask {
 
    private String jobName = "";
 
    public ScheduledExceutorTest2(String jobName) {
        super();
        this.jobName = jobName;
    }
 
    @Override
    public void run() {
        System.out.println("Date = " + new Date() + ", execute " + jobName);
    }
 
    
    public Calendar getEarliestDate(Calendar currentDate, int dayOfWeek, int hourOfDay, int minuteOfHour,
            int secondOfMinite) {
        // 计算当前时间的WEEK_OF_YEAR,DAY_OF_WEEK, HOUR_OF_DAY, MINUTE,SECOND等各个字段值
        int currentWeekOfYear = currentDate.get(Calendar.WEEK_OF_YEAR);
        int currentDayOfWeek = currentDate.get(Calendar.DAY_OF_WEEK);
        int currentHour = currentDate.get(Calendar.HOUR_OF_DAY);
        int currentMinute = currentDate.get(Calendar.MINUTE);
        int currentSecond = currentDate.get(Calendar.SECOND);
        // 如果输入条件中的dayOfWeek小于当前日期的dayOfWeek,则WEEK_OF_YEAR需要推迟一周
        boolean weekLater = false;
        if (dayOfWeek < currentDayOfWeek) {
            weekLater = true;
        } else if (dayOfWeek == currentDayOfWeek) {
            // 当输入条件与当前日期的dayOfWeek相等时，如果输入条件中的
            // hourOfDay小于当前日期的
            // currentHour，则WEEK_OF_YEAR需要推迟一周
            if (hourOfDay < currentHour) {
                weekLater = true;
            } else if (hourOfDay == currentHour) {
                // 当输入条件与当前日期的dayOfWeek, hourOfDay相等时，
                // 如果输入条件中的minuteOfHour小于当前日期的
                // currentMinute，则WEEK_OF_YEAR需要推迟一周
                if (minuteOfHour < currentMinute) {
                    weekLater = true;
                } else if (minuteOfHour == currentSecond) {
                    // 当输入条件与当前日期的dayOfWeek, hourOfDay，
                    // minuteOfHour相等时，如果输入条件中的
                    // secondOfMinite小于当前日期的currentSecond，
                    // 则WEEK_OF_YEAR需要推迟一周
                    if (secondOfMinite < currentSecond) {
                        weekLater = true;
                    }
                }
            }
        }
        if (weekLater) {
            // 设置当前日期中的WEEK_OF_YEAR为当前周推迟一周
            currentDate.set(Calendar.WEEK_OF_YEAR, currentWeekOfYear + 1);
        }
        // 设置当前日期中的DAY_OF_WEEK,HOUR_OF_DAY,MINUTE,SECOND为输入条件中的值。
        currentDate.set(Calendar.DAY_OF_WEEK, dayOfWeek);
        currentDate.set(Calendar.HOUR_OF_DAY, hourOfDay);
        currentDate.set(Calendar.MINUTE, minuteOfHour);
        currentDate.set(Calendar.SECOND, secondOfMinite);
        return currentDate;
    }
 
    public static void main(String[] args) throws Exception {
        ScheduledExceutorTest2 test = new ScheduledExceutorTest2("job1");
        // 获取当前时间
        Calendar currentDate = Calendar.getInstance();
        long currentDateLong = currentDate.getTime().getTime();
        System.out.println("Current Date = " + currentDate.getTime().toString());
        // 计算满足条件的最近一次执行时间
        Calendar earliestDate = test.getEarliestDate(currentDate, 3, 18, 30, 00);
        long earliestDateLong = earliestDate.getTime().getTime();
        System.out.println("Earliest Date = " + earliestDate.getTime().toString());
        // 计算从当前时间到最近一次执行时间的时间间隔
        long delay = earliestDateLong - currentDateLong;
        // 计算执行周期为一星期
        long period = 7 * 24 * 60 * 60 * 1000;
        ScheduledExecutorService service = Executors.newScheduledThreadPool(10);
        // 从现在开始delay毫秒之后，每隔一星期执行一次job1
        service.scheduleAtFixedRate(test, delay, period, TimeUnit.MILLISECONDS);
    }
 
}

time:

    cron: 0/5 * * * * *

    interval: 5

@Component
public class TimeTask {
    
    @Scheduled(cron = "${time.cron}")
    public void  flush1() throws  Exception{
            System.out.println("Execute1");
        }
    
    @Scheduled(cron = "0/${time.interval} * * * * ?")
    public void  flush2() throws  Exception{
            System.out.println("Execute2");
        }
    
    @Scheduled(cron = "0/5 * * * * ?")
    public void  flush3() throws  Exception{
            System.out.println("Execute3");
        }
 
}

@Scheduled(fixedDelay = 5000) //上一次执行完毕时间点之后5秒再执行

@Scheduled(fixedDelayString = "5000") //上一次执行完毕时间点之后5秒再执行

@Scheduled(fixedDelayString = "${time.fixedDelay}")
void testFixedDelayString() {
     System.out.println("Execute”);
}

@Scheduled(fixedRate = 5000) //上一次开始执行时间点之后5秒再执行

@Scheduled(initialDelay=1000, fixedRate=5000) //第一次延迟1秒后执行，之后按fixedRate的规则每5秒执行一次

public class QuartzJob implements Job {
    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        System.out.println(new Date());
    }
}

<dependency>
            <groupId>org.quartz-scheduler</groupId>
            <artifactId>quartz</artifactId>
            <version>2.3.0</version>
</dependency>

@Component
//SpringBoot服务启动执行
public class CronScheduler implements CommandLineRunner {
 
    @Override
    public void run(String... args) throws Exception {
        JobDetail build = JobBuilder.newJob(QuartzJob.class)
                .withIdentity("myJob", "group1")
                .build();
        Date date = new Date();
        long startTime = date.getTime() + 5000;
        long endTime = date.getTime() + 15000;
        CronTrigger c = TriggerBuilder.newTrigger()
                .startAt(new Date(startTime))
                .endAt(new Date(endTime))
                .withIdentity("CronTrigger1", "t1")
                .withSchedule(CronScheduleBuilder.cronSchedule("0/2 * * * * ?"))
                .build();
        Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
        //设置调度的job和trigger
        scheduler.scheduleJob(build, c);
        //开启调度
        scheduler.start();
        //暂停,可以重新启动
        //scheduler.standby();
        //停止调度程序触发触发器，并清除与调度程序关联的所有资源
        //scheduler.shushutdown();
    }
    
}

public class QuartzJob implements Job {
 
    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        System.out.println(new Date());
    }
 
}