spring之定时任务

完整代码实现

/**
 * 任务调度处理
 */
@Configuration
public class QuartzScheduler {
    // 任务调度
    @Autowired
    private Scheduler scheduler;

    /**
     * 开始执行所有任务
     */
    public void startJob() throws SchedulerException {
        startJob1(scheduler);
        startJob2(scheduler);
        scheduler.start();
    }

    /**
     * 获取Job信息
     */
    public String getJobInfo(String name, String group) throws SchedulerException {
        TriggerKey triggerKey = new TriggerKey(name, group);
        CronTrigger cronTrigger = (CronTrigger) scheduler.getTrigger(triggerKey);
        return String.format("time:%s,state:%s", cronTrigger.getCronExpression(),
                scheduler.getTriggerState(triggerKey).name());
    }

    /**
     * 修改某个任务的执行时间
     */
    public boolean modifyJob(String name, String group, String time) throws SchedulerException {
        Date date = null;
        TriggerKey triggerKey = new TriggerKey(name, group);
        CronTrigger cronTrigger = (CronTrigger) scheduler.getTrigger(triggerKey);
        String oldTime = cronTrigger.getCronExpression();
        if (!oldTime.equalsIgnoreCase(time)) {
            CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(time);
            CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(name, group)
                    .withSchedule(cronScheduleBuilder).build();
            date = scheduler.rescheduleJob(triggerKey, trigger);
        }
        return date != null;
    }

    /**
     * 暂停所有任务
     */
    public void pauseAllJob() throws SchedulerException {
        scheduler.pauseAll();
    }

    /**
     * 暂停某个任务
     */
    public void pauseJob(String name, String group) throws SchedulerException {
        JobKey jobKey = new JobKey(name, group);
        JobDetail jobDetail = scheduler.getJobDetail(jobKey);
        if (jobDetail == null)
            return;
        scheduler.pauseJob(jobKey);
    }

    /**
     * 恢复所有任务
     */
    public void resumeAllJob() throws SchedulerException {
        scheduler.resumeAll();
    }

    /**
     * 恢复某个任务
     */
    public void resumeJob(String name, String group) throws SchedulerException {
        JobKey jobKey = new JobKey(name, group);
        JobDetail jobDetail = scheduler.getJobDetail(jobKey);
        if (jobDetail == null)
            return;
        scheduler.resumeJob(jobKey);
    }

    /**
     * 删除某个任务
     */
    public void deleteJob(String name, String group) throws SchedulerException {
        JobKey jobKey = new JobKey(name, group);
        JobDetail jobDetail = scheduler.getJobDetail(jobKey);
        if (jobDetail == null)
            return;
        scheduler.deleteJob(jobKey);
    }

    private void startJob1(Scheduler scheduler) throws SchedulerException {
        // 通过JobBuilder构建JobDetail实例，JobDetail规定只能是实现Job接口的实例
        // JobDetail 是具体Job实例
        JobDetail jobDetail = JobBuilder.newJob(SchedulerQuartzJob1.class).withIdentity("job1", "group1").build();
        // 基于表达式构建触发器
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule("0/5 * * * * ?");
        // CronTrigger表达式触发器 继承于Trigger
        // TriggerBuilder 用于构建触发器实例
        CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity("job1", "group1")
                .withSchedule(cronScheduleBuilder).build();
        scheduler.scheduleJob(jobDetail, cronTrigger);
    }

    private void startJob2(Scheduler scheduler) throws SchedulerException {
        JobDetail jobDetail = JobBuilder.newJob(SchedulerQuartzJob2.class).withIdentity("job2", "group2").build();
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule("0 0/5 * * * ?");
        CronTrigger cronTrigger = TriggerBuilder.newTrigger().withIdentity("job2", "group2")
                .withSchedule(cronScheduleBuilder).build();
        scheduler.scheduleJob(jobDetail, cronTrigger);
    }
}

注入Scheduler

• 这里采用监听spring容器加载完毕后事件，启动任务调用

@Configuration
public class ApplicationStartQuartzJobListener implements ApplicationListener<ContextRefreshedEvent>{
    @Autowired
    private QuartzScheduler quartzScheduler;

    /**
     * 初始启动quartz
     */
    @Override
    public void onApplicationEvent(ContextRefreshedEvent event) {
        try {
            quartzScheduler.startJob();
            System.out.println("任务已经启动...");
        } catch (SchedulerException e) {
            e.printStackTrace();
        }
    }

    /**
     * 初始注入scheduler
     */
    @Bean
    public Scheduler scheduler() throws SchedulerException{
        SchedulerFactory schedulerFactoryBean = new StdSchedulerFactory();
        return schedulerFactoryBean.getScheduler(); 
    }

}

springboot 定时任务

• 引入依赖

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

• 开启定时

@SpringBootApplication
@EnableScheduling
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

• 定时任务

@Component
public class Scheduler1Task {
    private int count = 0;

    @Scheduled(cron = "*/6 * * * * ?")/*每隔六秒钟执行一次*/
    private void process() {
        System.out.println("this is scheduler task runing  " + (count++));
    }
}

    @Scheduled(fixedRate = 6000)/*每隔六秒钟执行一次*/
    public void reportCurrentTime() {
        System.out.println("现在时间：" + dateFormat.format(new Date()));
    }

cron表达式参考：
详情