任务调度

1.学习目标

1.1 定时任务概述

1.2 jdk实现任务调度

1.3 SpringTask实现任务调度

1.4 Spring-Task 分析

1.5 Cron表达式

https://cron.qqe2.com/

2. Quartz 基本应用

2.1 Quartz 基本介绍

2.2 Quartz API介绍

2.3 入门案例

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

2.3.1 新建任务类

2.3.2 执行步骤

package top.psjj.quartzstury;import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import top.psjj.quartzstury.job.MyJob;public class QuartzTest {public static void main(String[] args) throws SchedulerException {// 1.创建任务调度器SchedulerFactory schedulerFactory = new StdSchedulerFactory();Scheduler scheduler = schedulerFactory.getScheduler();// 2.创建Job 任务类JobDetail jobDetail = JobBuilder.newJob(MyJob.class).withIdentity("job1", "group1").build();// 3.创建触发器，定时任务的执行时机Trigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger1", "group1")// 使用简单触发器,每3秒执行一次.withSchedule(SimpleScheduleBuilder.simpleSchedule().withIntervalInSeconds(3).repeatForever()).startNow().build();// 4.执行任务scheduler.scheduleJob(jobDetail,trigger);// 开始执行scheduler.start();}
}

2.4 QuartzApi详解

2.4.1 JobDetail

2.4.2 简单触发器

2.4.3 CronTrigger

3. 基于Springboot整合Q uatrz

3.1 Springboot整合Quatrz

 <dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-quartz</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.26</version></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.60</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies>

2、配置信息详见官网
https://www.quartz-scheduler.org/documentation/quartz-2.3.0/configuration/#configuration-reference

Controller



测试