Spring注解方式实现定时器
一、springmvc.xml中添加以下配置
1、beans添加xmlnx:task
xmlns:task="http://www.springframework.org/schema/task"
2、xsi:schemaLocation中添加
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd
3、核心配置
（1）方法一：
<context:annotation-config /> <!-- spring扫描注解的配置（要扫描的包，即定时器所在包） --> <context:component-scan base-package="com.qiyuan.listener" />
<!-- 开启这个配置，spring才能识别@Scheduled注解--> <task:annotation-driven scheduler="qbScheduler" mode="proxy"/> <task:scheduler id="qbScheduler" pool-size="10"/>
说明：理论上只需要加上<task:annotation-driven />这句配置就可以了，这些参数都不是必须的（见方法二）。
（2）方法二
<!-- task任务注解扫描包（定时器开关） --><task:annotation-driven/> <!-- 用定时器注解 --> <!-- 扫描位置是 --><context:annotation-config/> <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/> <context:component-scan base-package="com.qiyuan.listener"/>
二、定时任务Java代码
（1）接口和实现类
package com.qiyuan.listener;public interface Test {public void myTest1(); public void myTest2(); public void myTest3();public void myTest4();}
package com.qiyuan.listener;import java.text.SimpleDateFormat;import java.util.Date;import javax.annotation.Resource;import org.springframework.scheduling.annotation.Scheduled;import org.springframework.stereotype.Component;import com.qiyuan.bean.TRate;import com.qiyuan.service.AnalysticService;import com.qiyuan.service.CenterPurseService;import com.qiyuan.service.OrderService;import com.qiyuan.service.RateService;import com.qiyuan.util.RateUtil;@Componentpublic class TestImp implements Test {@Resourceprivate RateService rateServiceImp;@Resourceprivate CenterPurseService centerPurseServiceImp;@Resourceprivate OrderService orderServiceImp;@Resourceprivate AnalysticService analysticServiceImp;int count1 = 0;int count2 = 0;int count3 = 0;int count4 = 0;@Scheduled(cron="0 */5 * * * ?")//每5分钟执行一次 @Overridepublic void myTest1() {System.out.println("进入测试定时器1"); ++count1;System.out.println("定时器1：时间=" + new Date() + " 执行了" + count1 + "次"); // 1次//查询各种币的汇率TRate tRate=new TRate();tRate.setRate(1);tRate.setYkcrate(RateUtil.YKC());tRate.setBtcrate(RateUtil.BTC());tRate.setLtcrate(RateUtil.LTC());tRate.setEthrate(RateUtil.ETH());tRate.setLastmodify(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));System.out.println("==========汇率"+tRate);//更新汇率表rateServiceImp.updateRate(tRate);//查询钱包充值记录，更新用户钱包centerPurseServiceImp.searchPurseChargeRecord();}@Scheduled(cron="0 0 2 * * ?")//每天凌晨一点执行一次 @Overridepublic void myTest2() {System.out.println("进入测试定时器2"); ++count2;System.out.println("定时器2：时间=" + new Date() + " 执行了" + count2 + "次"); // 1次//每天凌晨1点：超过7天已发货但未收货的让系统自动收货orderServiceImp.autoAcceptOrder();}@Scheduled(cron="0 0 2 * * ?")//每天凌晨两点执行一次 @Overridepublic void myTest3() {System.out.println("进入测试定时器3"); ++count3;System.out.println("定时器3：时间=" + new Date() + " 执行了" + count3 + "次"); // 1次//每天凌晨1点统计前一天的数据analysticServiceImp.insertAnalystic();}@Scheduled(cron = "0 0 3 1 * ?")//每个月1号凌晨三点执行一次public void myTest4(){System.out.println("进入测试定时器4"); ++count4;System.out.println("定时器3：时间=" + new Date() + " 执行了" + count4 + "次"); // 1次//每个月1号凌晨三点清空临时订单表的数据orderServiceImp.deleteAllTempOrder();}}
三、扩展资料
关于@Scheduled注解，查看源文件中该注解的定义
@Target({java.lang.annotation.ElementType.METHOD, java.lang.annotation.ElementType.ANNOTATION_TYPE}) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface Scheduled {public abstract String cron(); public abstract long fixedDelay(); public abstract long fixedRate(); }
参数具体介绍见：
（1）理解 Spring 定时任务的 fixedRate 和 fixedDelay 的区别
（2）
<?xml version="1.0" encoding="UTF-8"?><beansxmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:task="http://www.springframework.org/schema/task" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsdhttp://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd " ><!-- 扫描：通知spring容器采用自动扫描机制查找注解的bean --><context:component-scan base-package="com.qiyuan.controller"/>
<!-- 默认加载方法，启动时加载 （定时器的另外一种方法）--><!-- <bean id="templateAnnotationInit1" class="com.qiyuan.listener.TestTimer1" init-method="showTimer1" /><bean id="templateAnnotationInit2" class="com.qiyuan.listener.TestTimer2" init-method="showTimer2" /><bean id="templateAnnotationInit3" class="com.qiyuan.listener.TestTimer3" init-method="showTimer3" /> --><!-- task任务注解扫描包（定时器开关） --><task:annotation-driven/> <!-- 用定时器注解 --> <!-- 扫描位置是 --><context:annotation-config/> <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/> <context:component-scan base-package="com.qiyuan.listener"/> <!--开启springmvc 注解 --><mvc:annotation-driven> <mvc:message-converters> <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean> </mvc:message-converters></mvc:annotation-driven><!-- 视图解析器 --><bean id="intealResourceViewResolver" class="org.springframework.web.servlet.view.IntealResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property> <property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix" value=".jsp"></property></bean><!-- 前台拦截器 --><mvc:interceptors> <mvc:interceptor> <!-- 过滤全部请求 --> <mvc:mapping path="/**"/> <!-- 除了此请求 --> <mvc:exclude-mapping path="/login/*"/> <mvc:exclude-mapping path="/item/*"/> <mvc:exclude-mapping path="/analystic/*"/> <mvc:exclude-mapping path="/members/*"/> <mvc:exclude-mapping path="/itemMage/*"/> <mvc:exclude-mapping path="/back_order/*"/> <mvc:exclude-mapping path="/back_order1/*"/> <mvc:exclude-mapping path="/logistics/*"/> <mvc:exclude-mapping path="/product/*"/> <mvc:exclude-mapping path="/admin/*"/> <bean class="com.qiyuan.interceptor.MyHandlerInterceptor"></bean> </mvc:interceptor></mvc:interceptors><!-- 后台（管理员）拦截器 --><mvc:interceptors> <mvc:interceptor> <!-- 过滤全部请求 --> <mvc:mapping path="/**"/> <!-- 除了此请求 --> <mvc:exclude-mapping path="/login/*"/> <mvc:exclude-mapping path="/centerAddress/*"/> <mvc:exclude-mapping path="/centerOrder/*"/> <mvc:exclude-mapping path="/centerPurse/*"/> <mvc:exclude-mapping path="/centerScore/*"/> <mvc:exclude-mapping path="/centerTeam/*"/> <mvc:exclude-mapping path="/item/*"/> <mvc:exclude-mapping path="/order/*"/> <mvc:exclude-mapping path="/shopCar/*"/> <mvc:exclude-mapping path="/userCenter/*"/> <mvc:exclude-mapping path="/back_order1/*"/> <bean class="com.qiyuan.interceptor.MyHandlerInterceptor_back"></bean> </mvc:interceptor></mvc:interceptors><!-- 后台（供应商）拦截器 --><mvc:interceptors> <mvc:interceptor> <!-- 过滤全部请求 --> <mvc:mapping path="/**"/> <!-- 除了此请求 --> <mvc:exclude-mapping path="/login/*"/> <mvc:exclude-mapping path="/centerAddress/*"/> <mvc:exclude-mapping path="/analystic/*"/> <mvc:exclude-mapping path="/centerOrder/*"/> <mvc:exclude-mapping path="/centerPurse/*"/> <mvc:exclude-mapping path="/centerScore/*"/> <mvc:exclude-mapping path="/centerTeam/*"/> <mvc:exclude-mapping path="/item/*"/> <mvc:exclude-mapping path="/order/*"/> <mvc:exclude-mapping path="/shopCar/*"/> <mvc:exclude-mapping path="/userCenter/*"/> <mvc:exclude-mapping path="/admin/*"/> <mvc:exclude-mapping path="/itemMage/*"/> <mvc:exclude-mapping path="/logistics/*"/> <mvc:exclude-mapping path="/members/*"/> <mvc:exclude-mapping path="/back_order/*"/> <mvc:exclude-mapping path="/product/*"/> <bean class="com.qiyuan.interceptor.MyHandlerInterceptor_back1"></bean> </mvc:interceptor></mvc:interceptors><!-- 文件上传 --><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="UTF-8"></property><property name="maxUploadSize" value="99999999999"></property><property name="resolveLazily" value="true"></property></bean>
</beans>
作者：沧海一粟hr
来源链接：https://www.cnblogs.com/javahr/p/8318573.html
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