spring定时器(注解的形式)
最近有个需求,要在凌晨的时候,根据某几张表生成一张定时任务表里的数据,数据的状态为0(未整改),然后在当天晚上,再把这些数据的状态没改变的,改变状态为1(待整改),然后要用到定时器,百度了一下用注解形式的很方便,还能在一个方法里有多个定时任务,所以就试着试了一下,详情如下:
spring-task.xml中配置如下:
<?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-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd "> <!-- 配置task任务扫描注解 --> <task:annotation-driven/> <!-- 指定task任务扫描位置 --> <context:annotation-config/> <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/> <context:component-scan base-package="com.infohold.city.map.controller.web"/> </beans>
web.xml中配上spring-task.xml的加载:
<context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-dao.xml,classpath:spring-mvc.xml,classpath:spring-service.xml,classpath:spring-task.xml</param-value> </context-param>
然后就可以通过注解实现定时任务啦,
package com.infohold.city.map.controller.web; import javax.annotation.Resource; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component; import org.springframework.stereotype.Controller; import com.infohold.city.map.service.TaskService; @Controller @Component public class TaskController{ @Resource private TaskService taskService; /** * * 定时器--添加排查任务 * 每天凌晨0:50定时生成数据 */ @Scheduled(cron="0 55 0 * * ?") public void getCompanyCheckTask() { taskService.getCompanyCheckTask(); } /** * * 定时器--修改排查任务状态为3(未执行) * 定时器每天晚上23:50 修改当天凌晨0:50到1:50的数据 */ @Scheduled(cron="0 50 23 * * ? ") public void updateCompanyCheckTask() { taskService.updateCompanyCheckTask(); } }
需要注意的是,刚开始我为了偷懒就把定时器的配置加在了spring-mvc.xml中,后来发现定时器可以启动成功,但是接口敲完也测完,发布到服务器之后,发现数据库里生成了两条一模一样的数据,检查代码没发现有啥不妥,当时的serviceimpl层的代码如下:
package com.infohold.city.map.service.impl; import java.util.Date; import java.util.GregorianCalendar; import java.util.List; import javax.annotation.Resource; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import com.infohold.city.map.dao.mybatis.CompanyCheckTaskDao; import com.infohold.city.map.dao.mybatis.CompanycheckplanmonthDao; import com.infohold.city.map.dao.mybatis.CompanycheckplanmonthitemDao; import com.infohold.city.map.dao.mybatis.TaskDao; import com.infohold.city.map.model.CompanyCheckPlanMonth; import com.infohold.city.map.model.CompanyCheckPlanMonthItem; import com.infohold.city.map.model.CompanyCheckTask; import com.infohold.city.map.service.TaskService; import com.infohold.city.map.util.CommonUtil; @Service @Transactional public class TaskServiceImpl implements TaskService{ @Resource private TaskDao taskDao; @Resource private CompanycheckplanmonthDao companycheckplanmonthDao; @Resource private CompanycheckplanmonthitemDao companycheckplanmonthitemDao; @Resource private CompanyCheckTaskDao companyCheckTaskDao; @Override public void getCompanyCheckTask() { //月度计划+月度计划项 列表 List<CompanyCheckPlanMonth> companycpmlist=companycheckplanmonthDao.getCompanyCheckPlanMonthList(); GregorianCalendar calendar=new GregorianCalendar(); // 取出当前的年,月,日 int year=calendar.get(calendar.YEAR); // 月的数值加1,使之变成习惯的月份大小(1~12月) int month=calendar.get(calendar.MONTH)+1; int today=calendar.get(calendar.DAY_OF_MONTH); for (CompanyCheckPlanMonth companyCheckPlanMonth : companycpmlist) { List<CompanyCheckPlanMonthItem> Companycheckplanmonthitemlist = companyCheckPlanMonth.getGetCompanycheckplanmonthitemlist(); int i=1; for (CompanyCheckPlanMonthItem companyCheckPlanMonthItem : Companycheckplanmonthitemlist) { CompanyCheckTask companyCheckTask = new CompanyCheckTask(); companyCheckTask.setId(CommonUtil.getUUID()); String num = String.format("%04d",i); companyCheckTask.setName(companyCheckPlanMonthItem.getName()+month+today+num); companyCheckTask.setState("0"); companyCheckTask.setCreateUser("定时器机器人"); companyCheckTaskDao.insertCompanyCheckTask(companyCheckTask); i++; } } } @Override public void updateCompanyCheckTask() { CompanyCheckTask companyCheckTask = new CompanyCheckTask(); companyCheckTask.setCheckTime(new Date()); companyCheckTask.setState("3"); companyCheckTask.setCreateUser("定时器机器人"); companyCheckTaskDao.updateCompanyCheckTask1(companyCheckTask); } }
在线Cron自动生成器:http://cron.qqe2.com/
检查了很多遍代码,发现没有问题,然后本地测试也是就生成一次代码,但是为什么代码提交到服务器上就会执行两次呢,百度了老半天,有说tomcat配置的问题,有说spring加载了两次呆滞的问题,后来尝试着把配置文件从springmvc.xml中隔离出来,果然好使,所以这以后的配置文件还是不能瞎加啊,借此警告自己。作为一名小菜鸟程序员,还是不能偷懒啊~~