确保SpringBoot定时任务只执行一次的常见方法小结

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@Component
public class MyScheduledTask {

    @Scheduled(fixedDelay = Long.MAX_VALUE)
    public void myTask() {
        // 这里编写你的任务逻辑
        System.out.println("执行只执行一次的任务");
    }
}

import org.springframework.scheduling.TaskScheduler;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;

import java.time.Instant;

@Component
public class TaskComponent {

    private TaskScheduler taskScheduler = new ThreadPoolTaskScheduler();

    public void schedule(Runnable task, Instant startTime) {
        taskScheduler.schedule(task, startTime);
    }
}

// 假设当前时间后2秒执行任务
Instant startTime = Instant.now().plusSeconds(2);
taskComponent.schedule(() -> {
    // 这里编写你的任务逻辑
    System.out.println("执行只执行一次的任务");
}, startTime);

import javax.annotation.PostConstruct;
import org.springframework.stereotype.Component;

@Component
public class MyInitTask {

    @PostConstruct
    public void init() {
        // 执行只执行一次的初始化任务
        System.out.println("执行只执行一次的初始化任务");
    }
}

import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;

@Component
public class MyApplicationRunner implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments args) throws Exception {
        // 执行只执行一次的任务
        System.out.println("执行只执行一次的任务");
    }
}