Spring Boot中定时任务Cron表达式的终极指南最佳实践记录

@SpringBootApplication
@EnableScheduling // 启用定时任务
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

@Component
public class MyScheduledTasks {
    // 每天凌晨2点执行
    @Scheduled(cron = "0 0 2 * * ?")
    public void dailyReport() {
        // 生成日报逻辑
    }
    // 每5分钟执行一次（秒级控制）
    @Scheduled(cron = "0 */5 * * * ?")
    public void checkSystemStatus() {
        // 系统健康检查
    }
}

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-quartz</artifactId>
</dependency>

@Configuration
public class QuartzConfig {
    @Bean
    public JobDetail sampleJobDetail() {
        return JobBuilder.newJob(SampleJob.class)
                .storeDurably()
                .build();
    }
    @Bean
    public Trigger sampleTrigger() {
        return TriggerBuilder.newTrigger()
                .forJob(sampleJobDetail())
                .withSchedule(CronScheduleBuilder.cronSchedule("0 0/30 9-18 ? * MON-FRI"))
                .build();
    }
}

@DisallowConcurrentExecution
@Scheduled(cron = "0 */5 * * * ?")
public void processDataBatch() {
    // 长时间批处理任务
}

@Scheduled(cron = "0 0 8 * * ?", zone = "Asia/Shanghai")
public void morningTask() {
    // 北京时间每天8点执行
}

logging.level.org.springframework.scheduling=DEBUG

@Test
public void testScheduledTask() {
    await().atMost(10, SECONDS)
           .untilAsserted(() -> {
               // 验证任务执行后的状态变化
           });
}

# 配置任务线程池
spring.task.scheduling.pool.size=5

@Scheduled(cron = "0 0 0 * * ?")
public void dynamicSchedule() {
    List<Holiday> holidays = holidayRepository.findByDate(LocalDate.now());
    if (holidays.isEmpty()) {
        // 执行日常任务
    }
}