quartz框架使用@Autowired注入为null

在Quartz框架中使用@Autowired注入为null的原因可能是因为没有将需要注入的类加入到Spring容器中。可以尝试以下几种方法解决这个问题：

1.在需要注入的类上添加@Component注解，将其加入到Spring容器中。

2.在需要注入的类所在的包上添加@ComponentScan注解，指定需要扫描的包路径。

3.在需要注入的类所在的配置类上添加@Configuration注解，并在其中使用@Bean注解将需要注入的类实例化并返回。

以下是第一种方法的示例代码：

@Component
public class SendTaskImpl {
    @Autowired
    private Dao dao;
    //...
}

如果以上方法都无法解决问题，可以尝试手动创建需要注入的类的实例，并在需要注入的类中使用setter方法进行注入。

相关问题

Quartz定时器＋Spring + @Autowired注入 空指针异常

空指针异常通常是因为对象没有正确地初始化或者被赋值为null。在使用Quartz定时器和Spring框架的时候，常见的空指针异常问题是因为没有正确地注入依赖。

首先，你需要检查Quartz定时器任务类是否被正确地声明为Spring Bean，并且使用了@Autowired注解来注入依赖。如果你忘记添加@Autowired注解，或者注解的对象没有正确地注入，就会出现空指针异常。

其次，你需要确保Spring容器已经正确地初始化。你可以在配置文件中添加如下配置，来确保Spring容器初始化：

<context:annotation-config />
<context:component-scan base-package="com.your.package" />

其中，`<context:annotation-config />`用来启用注解，`<context:component-scan>`用来扫描指定包下的所有组件。

最后，你需要检查Quartz定时器任务类中使用的依赖是否正确地注入。如果你使用的是Java Config方式配置Spring，你需要检查@Configuration注解是否正确地标注在配置类上，并且使用@Bean注解来创建Bean。

如果你使用的是XML配置方式，你需要检查是否正确地配置了依赖关系。

总之，空指针异常的出现可能有很多原因，你需要针对具体情况进行分析和调试。

springboot2 与 quartz 整合的demo。 后台可添加、修改、移除 定时任务。 也可查

### 回答1：
Spring Boot是一个轻量级的Java web开发框架，而Quartz是一个用于任务调度的高可靠性、高扩展性的开源工具。将两者整合起来，可以更方便地实现任务调度，本文就介绍一下关于Spring Boot2与Quartz整合的Demo。

该Demo的主要功能包括任务添加、任务修改、任务移除以及任务查看。

首先，我们需要添加Quartz的相关依赖，如下：

<!-- Quartz -->
<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz</artifactId>
    <version>2.3.2</version>
</dependency>
<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz-jobs</artifactId>
    <version>2.3.2</version>
</dependency>
<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz-jobs-no-logging</artifactId>
    <version>2.3.2</version>
</dependency>

然后，我们需要配置数据库，以Quartz自带的表为例，可使用以下配置：

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/quartz?useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver

quartz:
  scheduler:
    instanceName: quartzScheduler
    instanceId: AUTO
    jobStore:
      class: org.quartz.impl.jdbcjobstore.JobStoreTX
      driverDelegateClass: org.quartz.impl.jdbcjobstore.StdJDBCDelegate
      tablePrefix: QRTZ_
      isClustered: false
    threadPool:
      class: org.quartz.simpl.SimpleThreadPool
      threadCount: 5
      threadPriority: 5
      threadsInheritContextClassLoaderOfInitializingThread: true

接下来，我们需要创建一个JobDetail，用于指定需要执行的任务：

@Component
public class SomeJob extends QuartzJobBean {

    private String someParam;

    public void setSomeParam(String someParam) {
        this.someParam = someParam;
    }

    @Override
    protected void executeInternal(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        // 任务执行逻辑
    }
}

接下来，我们需要使用CronTriggerFactoryBean生成一个CronTrigger：

@Component
public class CronTriggerJob {

    @Autowired
    private Scheduler quartzScheduler;

    @Autowired
    private SomeJob someJob;

    public void start() throws Exception {
        CronTriggerFactoryBean cronTriggerFactoryBean = new CronTriggerFactoryBean();
        cronTriggerFactoryBean.setJobDetail(getJobDetail());
        cronTriggerFactoryBean.setCronExpression("0/5 * * * * ?");
        cronTriggerFactoryBean.setName("myCronTrigger");
        cronTriggerFactoryBean.afterPropertiesSet();
        Trigger trigger = cronTriggerFactoryBean.getObject();
        quartzScheduler.scheduleJob(getJobDetail(), trigger);
    }

    private JobDetail getJobDetail() {
        JobDetailFactoryBean jobDetailFactoryBean = new JobDetailFactoryBean();
        jobDetailFactoryBean.setJobClass(SomeJob.class);
        jobDetailFactoryBean.setName("myJobDetail");
        jobDetailFactoryBean.setDescription("this is my job detail");
        jobDetailFactoryBean.getJobDataMap().put("jobParam", "job param");
        jobDetailFactoryBean.afterPropertiesSet();
        return jobDetailFactoryBean.getObject();
    }
}

接下来，我们需要配置一个定时任务Controller，用于实现定时任务的添加、修改、移除以及查看功能：

@RestController
public class QuartzController {

    private static final Logger logger = LoggerFactory.getLogger(QuartzController.class);

    @Autowired
    private Scheduler quartzScheduler;

    /**
     * 添加定时任务
     */
    @PostMapping("/addJob")
    public void addJob(@RequestParam String jobName,
                       @RequestParam String jobGroup,
                       @RequestParam String cronExpression) {
        try {
            JobDetail jobDetail = JobBuilder.newJob(SomeJob.class)
                    .withIdentity(jobName, jobGroup)
                    .build();
            CronTrigger trigger = TriggerBuilder.newTrigger()
                    .withIdentity(jobName, jobGroup)
                    .withSchedule(CronScheduleBuilder.cronSchedule(cronExpression))
                    .build();
            quartzScheduler.scheduleJob(jobDetail, trigger);
            logger.info("add job success, jobName:{}, jobGroup:{}, cronExpression:{}", jobName, jobGroup, cronExpression);
        } catch (SchedulerException e) {
            logger.error("add job error, jobName:{}, jobGroup:{}, cronExpression:{}, e:{}", jobName, jobGroup, cronExpression, e.getMessage(), e);
        }
    }

    /**
     * 修改定时任务
     */
    @PostMapping("/modifyJob")
    public void modifyJob(@RequestParam String jobName,
                          @RequestParam String jobGroup,
                          @RequestParam String cronExpression) {
        try {
            TriggerKey triggerKey = new TriggerKey(jobName, jobGroup);
            CronTrigger oldTrigger = (CronTrigger) quartzScheduler.getTrigger(triggerKey);
            if (oldTrigger != null) {
                CronTrigger newTrigger = TriggerBuilder.newTrigger()
                        .withIdentity(jobName, jobGroup)
                        .withSchedule(CronScheduleBuilder.cronSchedule(cronExpression))
                        .startNow()
                        .build();
                // 更新定时任务
                quartzScheduler.rescheduleJob(triggerKey, newTrigger);
                logger.info("modify job success, jobName:{}, jobGroup:{}, cronExpression:{}", jobName, jobGroup, cronExpression);
            }
        } catch (SchedulerException e) {
            logger.error("modify job error, jobName:{}, jobGroup:{}, cronExpression:{}, e:{}", jobName, jobGroup, cronExpression, e.getMessage(), e);
        }
    }

    /**
     * 移除定时任务
     */
    @PostMapping("/removeJob")
    public void removeJob(@RequestParam String jobName,
                          @RequestParam String jobGroup) {
        try {
            TriggerKey triggerKey = new TriggerKey(jobName, jobGroup);
            quartzScheduler.unscheduleJob(triggerKey);
            quartzScheduler.deleteJob(JobKey.jobKey(jobName, jobGroup));
            logger.info("remove job success, jobName:{}, jobGroup:{}", jobName, jobGroup);
        } catch (Exception e) {
            logger.error("remove job error, jobName:{}, jobGroup:{}, e:{}", jobName, jobGroup, e.getMessage(), e);
        }
    }

    /**
     * 查看定时任务
     */
    @GetMapping("/listJob")
    public List<Map<String, Object>> listJob() {
        List<Map<String, Object>> list = new ArrayList<>();
        try {
            System.out.println(quartzScheduler.getSchedulerName());
            GroupMatcher<JobKey> matcher = GroupMatcher.anyJobGroup();
            Set<JobKey> jobKeys = quartzScheduler.getJobKeys(matcher);
            for (JobKey jobKey : jobKeys) {
                List<? extends Trigger> triggers = quartzScheduler.getTriggersOfJob(jobKey);
                for (Trigger trigger : triggers) {
                    Map<String, Object> item = new HashMap<>();
                    JobDetail jobDetail = quartzScheduler.getJobDetail(jobKey);
                    item.put("jobName", jobDetail.getKey().getName());
                    item.put("jobGroup", jobDetail.getKey().getGroup());
                    item.put("triggerName", trigger.getKey().getName());
                    item.put("triggerGroup", trigger.getKey().getGroup());
                    item.put("triggerState", quartzScheduler.getTriggerState(trigger.getKey()));
                    if (trigger instanceof SimpleTrigger) {
                        SimpleTrigger simpleTrigger = (SimpleTrigger) trigger;
                        item.put("startTime", simpleTrigger.getStartTime());
                        item.put("endTime", simpleTrigger.getEndTime());
                    }
                    if (trigger instanceof CronTrigger) {
                        CronTrigger cronTrigger = (CronTrigger) trigger;
                        item.put("cronExpression", cronTrigger.getCronExpression());
                    }
                    list.add(item);
                }
            }
        } catch (SchedulerException e) {
            logger.error("list job error, e:{}", e.getMessage(), e);
        }
        return list;
    }
}

最后，我们需要在启动类上添加@Configuration注解，以确保程序能够正常运行：

@SpringBootApplication
@Configuration
public class QuartzDemoApplication {

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

    // 启用Quartz调度器
    @Bean
    public SchedulerFactoryBean schedulerFactoryBean() {
        SchedulerFactoryBean schedulerFactoryBean = new SchedulerFactoryBean();
        schedulerFactoryBean.setDataSource(dataSource);
        schedulerFactoryBean.setAutoStartup(true);
        schedulerFactoryBean.setWaitForJobsToCompleteOnShutdown(true);
        schedulerFactoryBean.setQuartzProperties(quartzProperties());
        return schedulerFactoryBean;
    }

    // 配置Quartz属性
    private Properties quartzProperties() {
        Properties properties = new Properties();
        properties.put("org.quartz.scheduler.instanceName", "quartzScheduler");
        properties.put("org.quartz.scheduler.instanceId", "AUTO");
        properties.put("org.quartz.jobStore.driverDelegateClass", "org.quartz.impl.jdbcjobstore.StdJDBCDelegate");
        properties.put("org.quartz.jobStore.dataSource", "quartzDataSource");
        properties.put("org.quartz.jobStore.tablePrefix", "QRTZ_");
        properties.put("org.quartz.jobStore.isClustered", false);
        properties.put("org.quartz.threadPool.class", "org.quartz.simpl.SimpleThreadPool");
        properties.put("org.quartz.threadPool.threadCount", "5");
        properties.put("org.quartz.threadPool.threadPriority", "5");
        properties.put("org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread", true);
        return properties;
    }
}

至此，一款功能完备的Spring Boot2与Quartz整合Demo便完成了。

### 回答2：
以下是一个使用Spring Boot 2和Quartz整合的简单示例：

首先，确保在你的项目中添加了以下依赖：

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

然后，创建一个Quartz配置类，用于配置定时任务的调度器、触发器和任务：

@Configuration
public class QuartzConfig {

    @Autowired
    private ApplicationContext applicationContext;

    @Bean
    public JobFactory jobFactory() {
        AutowiringSpringBeanJobFactory jobFactory = new AutowiringSpringBeanJobFactory();
        jobFactory.setApplicationContext(applicationContext);
        return jobFactory;
    }

    @Bean
    public Scheduler scheduler() throws SchedulerException {
        SchedulerFactory schedulerFactory = new StdSchedulerFactory();
        Scheduler scheduler = schedulerFactory.getScheduler();
        scheduler.setJobFactory(jobFactory());
        scheduler.start();
        return scheduler;
    }

}

接下来，创建一个定时任务的示例类：

@Service
public class MyJob implements Job {

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException {
        System.out.println("Hello Quartz!");
    }

}

然后，创建一个定时任务管理器，用于添加、修改、移除和查找定时任务：

@Component
public class JobManager {

    @Autowired
    private Scheduler scheduler;

    public void addJob(String jobName, String jobGroup, String cronExpression) throws SchedulerException {
        JobDetail jobDetail = JobBuilder.newJob(MyJob.class)
                .withIdentity(jobName, jobGroup)
                .build();

        Trigger trigger = TriggerBuilder.newTrigger()
                .withIdentity(jobName, jobGroup)
                .withSchedule(CronScheduleBuilder.cronSchedule(cronExpression))
                .build();

        scheduler.scheduleJob(jobDetail, trigger);
    }

    public void updateJob(String jobName, String jobGroup, String cronExpression) throws SchedulerException {
        TriggerKey triggerKey = TriggerKey.triggerKey(jobName, jobGroup);
        CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerKey);
        trigger = trigger.getTriggerBuilder()
                .withIdentity(triggerKey)
                .withSchedule(CronScheduleBuilder.cronSchedule(cronExpression))
                .build();
        scheduler.rescheduleJob(triggerKey, trigger);
    }

    public void deleteJob(String jobName, String jobGroup) throws SchedulerException {
        JobKey jobKey = JobKey.jobKey(jobName, jobGroup);
        scheduler.deleteJob(jobKey);
    }

    public List<Map<String, Object>> getAllJobs() throws SchedulerException {
        List<Map<String, Object>> jobList = new ArrayList<>();
        for (String groupName : scheduler.getJobGroupNames()) {
            for (JobKey jobKey : scheduler.getJobKeys(GroupMatcher.jobGroupEquals(groupName))) {
                Map<String, Object> job = new HashMap<>();
                JobDetail jobDetail = scheduler.getJobDetail(jobKey);
                job.put("name", jobDetail.getKey().getName());
                job.put("group", jobDetail.getKey().getGroup());
                Trigger trigger = scheduler.getTriggersOfJob(jobKey).get(0);
                job.put("cronExpression", trigger instanceof CronTrigger ? ((CronTrigger) trigger).getCronExpression() : "N/A");
                jobList.add(job);
            }
        }
        return jobList;
    }

}

最后，创建一个控制器类，用于处理定时任务的添加、修改、移除和查找请求：

@RestController
public class JobController {

    @Autowired
    private JobManager jobManager;

    @PostMapping("/jobs")
    public void addJob(@RequestParam String name, @RequestParam String group, @RequestParam String cronExpression) throws SchedulerException {
        jobManager.addJob(name, group, cronExpression);
    }

    @PutMapping("/jobs")
    public void updateJob(@RequestParam String name, @RequestParam String group, @RequestParam String cronExpression) throws SchedulerException {
        jobManager.updateJob(name, group, cronExpression);
    }

    @DeleteMapping("/jobs")
    public void deleteJob(@RequestParam String name, @RequestParam String group) throws SchedulerException {
        jobManager.deleteJob(name, group);
    }

    @GetMapping("/jobs")
    public List<Map<String, Object>> getAllJobs() throws SchedulerException {
        return jobManager.getAllJobs();
    }

}

现在，你可以运行应用程序并使用以下API进行定时任务的添加、修改、移除和查找操作：

- 添加定时任务：`POST /jobs?name=job1&group=group1&cronExpression=0/10 * * * * ?`
- 修改定时任务：`PUT /jobs?name=job1&group=group1&cronExpression=0/30 * * * * ?`
- 移除定时任务：`DELETE /jobs?name=job1&group=group1`
- 查找所有定时任务：`GET /jobs`

这是一个简单的Spring Boot 2和Quartz整合的示例，可以用于管理定时任务的添加、修改、移除和查找操作。你可以根据自己的需求对代码进行进一步的调整和扩展。

### 回答3：
下面是一个以Spring Boot 2和Quartz整合的简单示例：

1. 首先，你需要在pom.xml文件中添加以下依赖项来引入Spring Boot和Quartz的库：

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

2. 创建一个Spring Boot的启动类，并添加`@EnableScheduling`注解，以启用定时任务的调度功能：

@SpringBootApplication
@EnableScheduling
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

3. 创建一个定时任务的配置类，使用`@Configuration`注解标记，并注入`SchedulerFactoryBean`来创建Quartz调度器：

@Configuration
public class QuartzConfig {
    @Bean
    public SchedulerFactoryBean schedulerFactoryBean() {
        SchedulerFactoryBean schedulerFactoryBean = new SchedulerFactoryBean();
        // 添加其他配置，如数据源设置等

        return schedulerFactoryBean;
    }
}

4. 创建一个定时任务类，使用`@Component`注解标记，并使用`@Scheduled`注解指定定时任务的执行时间。同时，你还可以使用`@Async`注解来异步执行任务。

@Component
public class MyJob {
    @Scheduled(cron = "0/5 * * * * ?") // 每隔5秒执行一次
    public void doJob() {
        // 定时任务执行的逻辑代码
    }
}

现在，你的Spring Boot应用已经整合了Quartz，并且可以添加、修改、移除定时任务了。在控制台中你可以通过查看Quartz的日志来确认定时任务是否正常执行。