<?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"  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">   <!-- 托管线程 --><bean id="messagePrinterTask" class="MessagePrinterTask">    </bean> <!-- 这样设置容器一启动就自动运行某个线程 start --> <bean id="springScheduleExecutorTask" class="org.springframework.scheduling.concurrent.ScheduledExecutorTask">      <property name="runnable" ref="messagePrinterTask" /><!-- messagePrinterTask为线程类 -->      <!-- 容器加载10秒后开始执行 -->      <property name="delay" value="http://www.mamicode.com/10000" />      <!-- 每次任务间隔 5秒，循环执行该线程，删除该设定就容器启动后只执行一次-->      <property name="period" value="http://www.mamicode.com/5000" />    </bean>          <bean id="springScheduledExecutorFactoryBean" class="org.springframework.scheduling.concurrent.ScheduledExecutorFactoryBean">      <property name="scheduledExecutorTasks">        <list>          <ref bean="springScheduleExecutorTask" />        </list>      </property>     </bean>  <!-- 这样设置容器一启动就自动运行某个线程 end -->    </beans>

import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;/** * Hello world! * */public class App {    public static void main( String[] args )    {        ApplicationContext appContext = new ClassPathXmlApplicationContext("applicationContext.xml");        }}