如何在Spring中精确运行一次@Scheduled job？

@Service
public class MyScheduledService {

    @Scheduled(cron = "0 0 12 * * ?") // 每天中午12点触发
    public void runScheduledJob() {
        // 执行定时任务的逻辑
    }
}

@Service
public class MyScheduledService {

    private boolean jobExecuted = false;

    @Scheduled(cron = "0 0 12 * * ?") // 每天中午12点触发
    public void runScheduledJob() {
        if (!jobExecuted) {
            // 执行定时任务的逻辑

            jobExecuted = true;
        }
    }
}

@Service
public class MyScheduledService {

    private boolean jobExecuted = false;

    @PostConstruct
    public void init() {
        runScheduledJob();
    }

    @Scheduled(cron = "0 0 12 * * ?") // 每天中午12点触发
    public void runScheduledJob() {
        if (!jobExecuted) {
            // 执行定时任务的逻辑

            jobExecuted = true;
        }
    }
}