• Quartz定时任务使用(二)


    Quartz定时任务

    本文假设你已经引入spring-boot-starter-web。已经是个SpringBoot项目了,如果不会搭建,这篇文章看一看

    3.1 Maven依赖

    需要额外引入quartz的starter:

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

    3.2 配置文件

    在application.properties 中需要额外添加quartz的配置,也可以把定时任务的crontab表达式提出来,如:

    schedule.task.test=0/2 * * * * ?
    spring.quartz.job-store-type=memory
    spring.quartz.scheduler-name=quartzScheduler

    这里,spring.quartz.job-store-type意思是用内存存储quartz的定时任务信息,如果需要用数据库存储,可以用:spring.quartz.job-store-type=jdbc,这样的话,配置的东西就多了,还需要配置quartz的数据源,配置spring.quartz.jdbc.initialize-schema属性。

    spring.quartz.scheduler-name指明scheduler的名称。

    3.3 配置定时任务

    注意这里,每个定时任务需要配置一个JobDetail和一个Trigger,Springboot自己管理了一个SchedulerFactory,因此不需要再配置SchedulerFactoryBean:

    QuartzJobConfig :

    package com.cff.springbootwork.quartz.config;
    
    import org.quartz.CronScheduleBuilder;
    import org.quartz.JobBuilder;
    import org.quartz.JobDetail;
    import org.quartz.Trigger;
    import org.quartz.TriggerBuilder;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import com.cff.springbootwork.quartz.job.SampleJob;
    
    @Configuration 
    public class QuartzJobConfig {
        @Value("${schedule.task.test}")
        private String testScheduleCron;
    
    
        @Bean
        public JobDetail teatQuartzDetail(){
            return JobBuilder.newJob(SampleJob.class).withIdentity("testQuartz").storeDurably().build();
        }
    
        @Bean
        public Trigger testQuartzTrigger(){
            CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(testScheduleCron);
            return TriggerBuilder.newTrigger().forJob(teatQuartzDetail())
                    .withIdentity("testQuartz")
                    .withSchedule(scheduleBuilder)
                    .build();
        }
    }

    这里的JobDetail 中的newJob必须实现Job接口,因此我们要自己建一个job。

    package com.cff.springbootwork.quartz.job;
    
    import org.quartz.JobExecutionContext;
    import org.quartz.JobExecutionException;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.scheduling.quartz.QuartzJobBean;
    import org.springframework.stereotype.Component;
    
    import com.cff.springbootwork.quartz.service.ScheduleService;
    
    @Component
    public class SampleJob extends QuartzJobBean {
        @Autowired
        private ScheduleService scheduleService;
    
        private String name;
    
        @Override
        protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
            scheduleService.doJob();
        }
    
        public ScheduleService getScheduleService() {
            return scheduleService;
        }
    
        public void setScheduleService(ScheduleService scheduleService) {
            this.scheduleService = scheduleService;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
    }

    3.4 测试的Service

    package com.cff.springbootwork.quartz.service;
    
    import org.springframework.stereotype.Service;
    
    @Service
    public class ScheduleService {
    
        public void doJob() {
            System.out.println("test");
        }
    
    }

    总结一句,Springboot 内置的定时任务已经可以实现大多数定时任务的需求,如果对任务有严格要求,可以使用xxl-job,它对quartz做了封装,适合多机部署定时任务。

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  • 原文地址:https://www.cnblogs.com/wanqiang/p/14281940.html
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