在xml 的配置文件
<?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: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/task http://www.springframework.org/schema/task/spring-task-3.2.xsd" > <!-- bean definition HeartBeatTask 启动定时任务的类 要做的什么事
-->
<bean id="heartBeat" class="devp.machine.business.controller.HeartBeatTask" /> <!-- task definition-->
<task:scheduler id="myScheduler" pool-size="10" />
<task:scheduled-tasks scheduler="myScheduler">
<task:scheduled ref="heartBeat" method="run" initial-delay="10000" fixed-delay="5000" />
</task:scheduled-tasks>
</beans>
<task:scheduled> 的参数说明如下:
initial-delay : 表示第一次运行前需要延迟的时间,单位是毫秒
fixed-delay : 表示从上一个任务完成到下一个任务开始的间隔, 单位是毫秒
fixed-rate : 表示从上一个任务开始到下一个任务开始的间隔, 单位是毫秒(如果某次任务开始时上次任务还没有结束,那么在上次任务执行完成时,当前任务会立即执行)
cron : cron 表达式,由6个字段组成,依次为 second, minute, hour, day, month, weekday 例如:
"0 0 * * * *" = the top of every hour of every day.
"*/10 * * * * *" = every ten seconds.(在 0, 10, 20, 30, 40, 50 秒时运行)
"0 0 8-10 * * *" = 8, 9 and 10 o'clock of every day.
"0 0/30 8-10 * * *" = 8:00, 8:30, 9:00, 9:30, 10:00 and 10:30 o'clock every day.
"0 0 9-17 * * MON-FRI" = on the hour nine-to-five weekdays
"0 0 0 25 12 ?" = every Christmas Day at midnight
要启动的类:
package devp.machine.business.controller; import devp.common.utils.IdCreator; import devp.machine.api.service.ICenterService; import devp.machine.impl.dao.ResourceCountDao; import devp.machine.impl.service.CenterService; import org.apache.commons.collections4.CollectionUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.transaction.annotation.Transactional; import java.util.List; import java.util.Map; public class HeartBeatTask { /** * 定时完成 统计数据资源中心的数据 */ @Autowired private ICenterService centerService; @Autowired private CenterService centerServiceImpl; @Autowired private ResourceCountDao resourceCountDao;
// run 方法就是启动的类 与配置文件中的方法名一致。 public void run(){
try{ // 获取查出来的数据 放在新的表中 Map<String, List<Map<String, Object>>> data = centerService.dataCount(); if(!data.isEmpty()){ // 清空表 String deleteSql = "delete from resource_count"; int delete = resourceCountDao.executeSQL(deleteSql); List<Map<String, Object>> entity = data.get("entity"); List<Map<String, Object>> relation = data.get("relation"); List<Map<String, Object>> text = data.get("text"); // 循环 存入数据库表 resource_count 中 Integer entityCount = centerServiceImpl.insertEntityList(entity); Integer relationCount = centerServiceImpl.insertRelationList(relation); Integer textCount =centerServiceImpl.insertTextList(text); } }catch (Exception e){ e.printStackTrace(); } } }