springtask 基本使用和 cron 表达式
springtask 的基本使用和 cron 表达式
spring 容器依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.5.RELEASE</version>
</dependency>
开启任务注解驱动。即扫描的时候扫描 springtask 相关的注解。
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:task="http://www.springframework.org/schema/task"
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-4.2.xsd
">
<context:component-scan base-package="com.mozq.task"/>
<task:annotation-driven/>
</beans>
准备 Spring 容器 + 定时任务
为了使用 springtask 需要准备 spring 容器和定时任务。通过 main 方法创建 spring 容器。@Scheduled 注解创建定时任务。
package com.mozq.task;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
@Component
public class TaskDemo {
@Scheduled(cron="* * * * * ?")
public void sendOrderMessage(){
System.out.println("发送订单消息");
}
public static void main(String[] args) throws InterruptedException {
ClassPathXmlApplicationContext app = new ClassPathXmlApplicationContext("spring-task.xml");
Thread.sleep(1000);
}
}
