Spring实现定时器
作者:互联网
定时删除数据库表中数据
功能点:Spring的task-scheduled
1、实现业务功能
/**
* 功能描述: 定时清理30天前内交易表的数据(时间:00:15)
*/
@Component
public class TraceShortTimeClearTask {
static Logger logger = LoggerFactory.getLogger(TraceShortTimeClearTask.class);
@Autowired
private TraceChannelMessageShortTimeService traceChannelMessageShortTimeService;
/**
* @description:定时清理30天前短时间内交易表的数据
*/
public void traceShortTimeClear() {
Date newDate = new Date();
LocalDate deleteDate = getDate(newDate,30);
try{
int i = traceChannelMessageShortTimeService.deleteTrace(deleteDate);
if (i >= 1){
logger.info("TraceShortTimeClearTask------------->traceShortTimeClear清理30天前短时间内交易表的数据成功");
}
}catch (Exception e){
logger.error("删除30天前的数据失败!" + e.getMessage());
}
}
/**
* 获取时间
*/
public static LocalDate getDate(Date now,int days){
Calendar calendar = Calendar.getInstance();
calendar.setTime(now);
calendar.add(Calendar.DATE, -days);
Date deleteDate = calendar.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String dateString = sdf.format(deleteDate);
DateTimeFormatter fmt = DateTimeFormatter.ofPattern("yyyy-MM-dd");
LocalDate localDate = LocalDate.parse(dateString,fmt);
return localDate;
}
}
2、配置定时规则
2.1 引入命名空间
<beans xmlns:task="http://www.springframework.org/schema/task"></beans>
2.2 导入xsi文件
<beans xsi:schemaLocation="
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd"></beans>
2.3 配置实现类
<bean id="clearTask" class="com.red.task.TraceShortTimeClearTask"></bean>
2.4 配置定时规则
<task:scheduled-tasks>
<!--
ref = "bean的id"
method = "实现类的方法名"
cron = "定时规则,秒,分,时,天,月,周,年"
-->
<task:scheduled ref="clearTask" method="traceShortTimeClear" cron="0 15 0 * * ?"/>
</task:scheduled-tasks>
3、数据库语句
<!--定时清理30天前短时间内交易表的数据-->
<delete id="deleteTrace">
delete from 表名
where 字段名 <#{deleteDate}'%'
</delete>
标签:定时器,实现,Spring,30,天前,Date,定时,calendar,deleteDate 来源: https://www.cnblogs.com/LittleSkinny/p/13919747.html