定时器4——Spring定时任务

在spring中使用定时很简单，首先需要在配置文件中加上task的命名空间

xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-4.0.xsd"

在spring中定时任务有两种方式

1. 注解方式

1. Spring-task.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:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd"
       default-autowire="byName" default-lazy-init="false">
    <!--配置包扫描-->
    <context:component-scan base-package="com.huawei.system.timer" />
 
    <!-- 定时任务配置 scheduler 方式 注解 -->
    <task:executor id="executor" pool-size="5"/>
    <task:scheduler id="scheduler" pool-size="10"/>
    <task:annotation-driven executor="executor" scheduler="scheduler"/>
 
</beans>

2. 定时任务类

package com.huawei.system.timer;

import java.text.SimpleDateFormat;
import java.util.Calendar;

import javax.annotation.Resource;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import com.huawei.resource.system.service.LogService;
import com.huawei.resource.utils.TSMDebugLog;
import com.huawei.system.service.IPersonalLineService;
import com.huawei.system.service.core.ICoreProjectService;

@Component
public class PpmTask {
    
    @Resource
    @SuppressWarnings("rawtypes")
    private ICoreProjectService coreProjectService;
    
    @Resource
    private IPersonalLineService personalLineServiceImpl;
    
    //声明日志打印类
    private TSMDebugLog  log = new TSMDebugLog(PpmTask.class);
    
    @Resource
    private LogService logService;
    
    /**
     * @Title: synPpmData
     * @Description: 每月12号凌晨3点同步PPM数据
     * @param     参数
     * @return void    返回类型
     * @throws
     */
    @Scheduled(cron = "0 0 3 12 * *")
    public void synPpmData() {
        String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());
        //日志入口
        log.enterFuncDebugLog();
        //打印字符串
        log.atFuncDebugLog("执行时间为：" + date);
        try {
            /*
                                     获取当前年份作为参数传递，因为PPM只能查询到当年的数据
             * */
            Integer intYear = Calendar.getInstance().get(Calendar.YEAR);
            
            // 调用方法执行业务逻辑
            coreProjectService.updateDataByPpmData(intYear.toString());
            
        } catch (Exception e) {
            //打印异常
            log.writeException(e);
            logService.addLog("PpmTask", "核算管理", "同步PPM数据", "失败", date);
            //出口日志
            log.exitFuncDebugLog("failed");
        }
    }
    
    
    /**
    * @Title: clearHtmlFile
    * @Description: 每天凌晨4:30清空生成的HTML文件
    * @param     参数
    * @return void    返回类型
    * @throws
    */
    @Scheduled(cron = "0 30 4 * * ?")
    public void clearHtmlFile() {
        String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(Calendar.getInstance().getTime());
        //日志入口
        log.enterFuncDebugLog();
        //打印字符串
        log.atFuncDebugLog("执行时间为：" + date);
        
        try {
            personalLineServiceImpl.deleHtml();
        } catch (Exception e) {
            //打印异常
            log.writeException(e);
            logService.addLog("PpmTask", "部门人力基线", "删除预览生成的html静态文件", "失败", date);
            //出口日志
            log.exitFuncDebugLog("failed");
        }
        
    }
}

注意：
        (1). 类上要加上@Component表示包扫描
        (2). 方法上要加上@Scheduled，在注解上写cron表达式

3. 在web.xml中引入Spring-task.xml

<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext-*.xml,classpath:spring-task.xml</param-value>
	</context-param>

2. 在配置文件中实现

//定时注解驱动
<task:annotation-driven />
//进行定时任务的类，将其定义为一个bean
<bean id="getUserService" class="com.bjc.service.impl.UserService"></bean>
//通过task标签，定义定时功能
<task:scheduled-tasks>
   <task:scheduled ref="getUserService" method="getUser" cron="59 59 23 * * ?" />
</task:scheduled-tasks>