spring @Scheduled 注解配置定时器

 

前段时间由于项目中用到定时任务,自己也查资料实现了,下来就把这些记录下来,方便查看.

1. 先在配置文件配置扫描定时任务的包  我这里是  spring-context.xml 

   ---

   ​
   ​
   <?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:jdbc="http://www.springframework.org/schema/jdbc"  
   	xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:util="http://www.springframework.org/schema/util" xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation="
   		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
   		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
   		http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.0.xsd
   		http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
   		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
   		http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd
   		http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd"
   	default-lazy-init="true">
   
   	<description>Spring Configuration</description>
   	
       <!-- 加载配置属性文件 -->
   	<context:property-placeholder ignore-unresolvable="true" location="classpath:xiangyou.properties" />
   	
   	<!-- 加载应用属性实例，可通过  @Value("#{APP_PROP['jdbc.driver']}") String jdbcDriver 方式引用 -->
       <util:properties id="APP_PROP" location="classpath:xiangyou.properties" local-override="true"/>
   	
   	<!-- 使用Annotation自动注册Bean，解决事物失效问题：在主容器中不扫描@Controller注解，在SpringMvc中只扫描@Controller注解。  -->
   	<context:component-scan base-package="com.xiangyou"><!-- base-package 如果多个，用“,”分隔 -->
   		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
   	</context:component-scan>
   <!-- 计划任务配置，用 @Service @Lazy(false)标注类，用@Scheduled(cron = "0 0 2 * * ?")标注方法 -->
       <task:executor id="executor" pool-size="10"/> <task:scheduler id="scheduler" pool-size="10"/>
       <task:annotation-driven scheduler="scheduler" executor="executor" proxy-target-class="true"/>
   ​
   
   ​

   ---

   其中需要有  

   1. xmlns:task="http://www.springframework.org/schema/task"                               
   2. xsi:schemaLocation="http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd"                          
   3. <context:component-scan> 中的 base-package=""里面配置扫包范围                           
   4.<task>标签计划任务配置，用 @Service @Lazy(false)标注类，用@Scheduled(cron = "0 0 2 * * ?")标注方法

    

2. 将自己需要创建定时器的类创建在上面配置的范围内

   并且要在定时器类上加 @Service @Lazy(false) 这两个注解, 用 @Scheduled(cron = "0 0 2 * * ?") 标注方法.