作者Gitee地址 https://gitee.com/thciweicloud
作者项目 面包博客，一个微服务架构的前后端分离博客系统。

定时任务

主流 quartz

定时任务我们需要了解一下cron表达式

启动类添加@EnableScheduling

• 配置类

bean.setTriggers有几个trigger（触发器）写几个即可

simpleTriggerFactoryBean最简单

cronTriggerFactoryBean最灵活

package com.thciwei.demo.config;

import com.thciwei.demo.job.MySecondJob;
import org.quartz.JobDataMap;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.quartz.*;

import java.util.Date;

@Configuration
public class QuartzConfig {
    @Bean
    MethodInvokingJobDetailFactoryBean methodInvokingJobDetailFactoryBean() {
        MethodInvokingJobDetailFactoryBean bean = new MethodInvokingJobDetailFactoryBean();
        bean.setTargetBeanName("myFirstJob");
        bean.setTargetMethod("sayHello");
        return bean;
    }

    @Bean
    JobDetailFactoryBean jobDetailFactoryBean() {
        JobDetailFactoryBean bean = new JobDetailFactoryBean();
        JobDataMap map = new JobDataMap();
        map.put("name", "thciwei");
        bean.setJobDataAsMap(map);
        bean.setJobClass(MySecondJob.class);
        return bean;
    }

    @Bean
    SimpleTriggerFactoryBean simpleTriggerFactoryBean() {
        SimpleTriggerFactoryBean bean = new SimpleTriggerFactoryBean();
        bean.setJobDetail(methodInvokingJobDetailFactoryBean().getObject());
        bean.setStartTime(new Date());
        bean.setRepeatInterval(2000);
        //循环
        bean.setRepeatCount(3);
        return bean;
    }

    @Bean
    CronTriggerFactoryBean cronTriggerFactoryBean() {
        CronTriggerFactoryBean bean = new CronTriggerFactoryBean();
        bean.setJobDetail(jobDetailFactoryBean().getObject());
        bean.setCronExpression("* * * * * ?");
        return bean;
    }

    @Bean
    SchedulerFactoryBean schedulerFactoryBean() {
        SchedulerFactoryBean bean = new SchedulerFactoryBean();
        bean.setTriggers(simpleTriggerFactoryBean().getObject(),cronTriggerFactoryBean().getObject());
        return bean;
    }

}

• MyFirstJob

package com.thciwei.demo.job;

import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class MyFirstJob {
    public void sayHello() {
        System.out.println("first job say hello"+new Date());
    }
}

• MySecondJob

需要继承QuartzJobBean

package com.thciwei.demo.job;

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

import java.util.Date;

public class MySecondJob extends QuartzJobBean {
    private String name;
    public void setName(String name){
        this.name=name;
    }

    @Override
    protected void executeInternal(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        System.out.println("second job say hello:"+name+":"+new Date());
    }
}