1. 开启注解@EnableSchedling
@SpringBootApplication
@EnableScheduling
public class Startup {
public static void main(String[] args) {
SpringApplication.run(Startup.class, args);
}
}
2. 固定速率，按时触发
@Scheduled(fixedRate = 1000)
public void fixRate() throws InterruptedException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("fixRate: " + sdf.format(new Date()));
Thread.sleep(1000);
}
3. 固定间隔，等待前一次触发完毕后再执行
@Scheduled(fixedDelay = 1000)
public void fixDelay() throws InterruptedException {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("fixDelay: " + sdf.format(new Date()));
Thread.sleep(1000);
}
当然，也支持cron表达式
@Scheduled(cron = "* * 21 * * ?")
public void cron() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println("cron: " + sdf.format(new Date()));
}
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