Quartz定时任务组件

官网：http://www.quartz-scheduler.org/

1）job - 任务 - 你要做什么事？

2）Trigger - 触发器 - 做什么事，什么时候触发，可以传入任务

3）Scheduler - 任务调度 - 可以传入多个触发器进行任务调度

SpringBoot整合Quartz框架

添加Quartz依赖:

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

自定义一个Job

package com.by.quartz;

import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class QuartzDemo {
    //任务
    public void printTime(){
        System.out.println("现在时刻："+new Date());
    }
}

编写quartz配置类

package com.by.config;

import com.by.quartz.QuartzDemo;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.quartz.CronTriggerFactoryBean;
import org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean;
import org.springframework.scheduling.quartz.SchedulerFactoryBean;

@Configuration
public class QuartzConfig {
    @Bean //job:干什么事
    public MethodInvokingJobDetailFactoryBean methodInvokingJobDetailFactoryBean(QuartzDemo quartzDemo){
        MethodInvokingJobDetailFactoryBean JobDetailFactoryBean = new MethodInvokingJobDetailFactoryBean();
        JobDetailFactoryBean.setTargetObject(quartzDemo);
        JobDetailFactoryBean.setTargetMethod("printTime");
        return JobDetailFactoryBean;
    }
    @Bean //trigger:什么时候干什么事
    public CronTriggerFactoryBean cronTriggerFactoryBean(MethodInvokingJobDetailFactoryBean JobDetailFactoryBean){
        CronTriggerFactoryBean cronTriggerFactoryBean = new CronTriggerFactoryBean();
        cronTriggerFactoryBean.setCronExpression("0/5 * * * * ?");
        cronTriggerFactoryBean.setJobDetail(JobDetailFactoryBean.getObject());
        return cronTriggerFactoryBean;
    }
    @Bean //scheduler:调度
    public SchedulerFactoryBean schedulerFactoryBean(CronTriggerFactoryBean cronTriggerFactoryBean){
        SchedulerFactoryBean schedulerFactoryBean = new SchedulerFactoryBean();
        schedulerFactoryBean.setTriggers(cronTriggerFactoryBean.getObject());
        return schedulerFactoryBean;
    }
}

启动启动类

package com.by;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.by.mapper")
public class IcanBackendApp {
    public static void main(String[] args) {
        SpringApplication.run(IcanBackendApp.class,args);
    }
}

结果：运行启动类，观察控制台，可以发现每隔5秒会输出一次，说明每隔1秒自定义 Job被调用一次。