定时任务实现方式
- Java中的java.util.Timer与java.util.TimerTask
- Quartz
- SpringBoot中的Scheduled

springboot定时任务

定义任务

@Component
public class ScheduleJob {

    @Scheduled(cron="0 0/2 8-20 * * ?") 
    public void job1() {
        //间隔2分钟执行任务
    }

    @Scheduled(cron="0 0/1 8-20 * * ?") 
    public void job2() {
        // 间隔1分钟执行任务 
    }
}

启动任务

@EnableScheduling
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

并行执行

springboot的schedule默认串行执行，要支持并行，需在applicationContext.xml中添加如下内容

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:task="http://www.springframework.org/schema/task"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">

    <!-- Enables the Spring Task @Scheduled programming model -->
    <task:executor id="executor" pool-size="5" />
    <task:scheduler id="scheduler" pool-size="10" />
    <task:annotation-driven executor="executor" scheduler="scheduler" />

</beans>

springboot定时任务

Kommentare: