Quartz

简单使用

一 、导入依赖

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

二、自定义Bean继承QuartzJobBean

import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.scheduling.quartz.QuartzJobBean;

import java.text.SimpleDateFormat;
import java.util.Date;

public class DateTimeJob extends QuartzJobBean {
 
    @Override
    protected void executeInternal(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        //获取JobDetail中关联的数据
        String msg = (String) jobExecutionContext.getJobDetail().getJobDataMap().get("msg");
        System.out.println("current time :"+new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) + "---" + msg);
    }
}

三、配置JobDetail和Trigger

import com.ivan.quartz.entity.DateTimeJob;
import org.quartz.*;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class QuartzConfig {
    @Bean
    public JobDetail printTimeJobDetail(){
        return JobBuilder.newJob(DateTimeJob.class)//PrintTimeJob我们的业务类
                .withIdentity("DateTimeJob")//可以给该JobDetail起一个id
                //每个JobDetail内都有一个Map，包含了关联到这个Job的数据，在Job类中可以通过context获取
                .usingJobData("msg", "Hello Quartz")//关联键值对
                .storeDurably()//即使没有Trigger关联时，也不需要删除该JobDetail
                .build();
    }
    @Bean
    public Trigger printTimeJobTrigger() {
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule("0/1 * * * * ?");
        return TriggerBuilder.newTrigger()
                .forJob(printTimeJobDetail())//关联上述的JobDetail
                .withIdentity("quartzTaskService")//给Trigger起个名字
                .withSchedule(cronScheduleBuilder)
                .build();
    }
}

四、使用

SpringBoot启动后自动执行定时器任务

Quartz的使用