Spring定时任务

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1.配置定时时间即执行时间，使用cron表达式

#定时时间,每月凌晨1点执行
task.cron=0 0 1 1 * ?
log.isWrite=true

2.在app-context.xml文件中加载配置文件

<bean id="propertyConfigurer"                     class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">            <list>                <value>/WEB-INF/config/common.properties</value>            </list>        </property></bean>

3.在app-context.xml文件注入Bean

<bean id="commonProperties" class="java.util.Properties">      <constructor-arg>           <props>               <prop key="task.cron">${task.cron}</prop>               <prop key="log.isWrite">${log.isWrite}</prop>           </props>       </constructor-arg></bean>

4.为接口的实现类添加定时任务注解，注意该方法的返回值为void，没有参数

@Scheduled(cron = "${task.cron}")

5.通过Spring上下文读取配置文件中的数据

package com.better517na.rewardCheckComputeService.util;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.stereotype.Component;import com.better517na.rewardCheckComputeService.service.IScheduleTaskService;/** * Spring 工具类. *  * @author peiyu */@Componentpublic class SpringContextUtil implements ApplicationContextAware {    /**     * Spring应用上下文环境     */    private static ApplicationContext applicationContext;    /**     *      * {@inheritDoc}.     */    @Override    public void setApplicationContext(ApplicationContext ctx) throws BeansException {        SpringContextUtil.applicationContext = ctx;        CommentedProperties properties = new CommentedProperties();        String path = SpringContextUtil.class.getClassLoader().getResource("").getPath();        try {            path = URLDecoder.decode(path, "UTF-8");        } catch (UnsupportedEncodingException e1) {            e1.printStackTrace();        }        System.out.println("####1加载配置文件:" + path);        path = path.substring(0, path.indexOf("classes")) + "config/common.properties";        System.out.println("####2加载配置文件:" + path);        try {            properties.load(new FileInputStream(path), "UTF-8");        } catch (IOException e) {            e.printStackTrace();        }        //获取配置文件中的值        FileLogUtil.isWrite = properties.getProperty("log.isWrite");        OutputStream fos = null;        try {             fos = new FileOutputStream(path);             //修改配置文件中的值             properties.setProperty("log.isWrite", "false");             properties.store(fos);             System.out.println("####" + computeDate + "奖励计算结束####");         } catch (Exception e) {             e.printStackTrace();             System.out.println("####定时计算服务出错：" + e.getMessage());         } finally {             if (fos != null) {                 try {                     fos.close();                 } catch (IOException e) {                     e.printStackTrace();                 }             }         }    }    /**     * 设置applicationContext.     *      * @return 返回applicationContext     */    public static ApplicationContext getApplicationContext() {        return applicationContext;    }    /**     * @param clazz .     * @return .     */    public static Object getBean(Class<?> clazz) {        return applicationContext.getBean(clazz);    }    /**     * @param name .     * @return .     */    public static Object getBean(String name) {        return applicationContext.getBean(name);    }}

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