1:实现触发器,最大的问题是jar包的处理(*.jar定时jar和sourcecodesource code):
此处,最关键的jar为第二个,名字最长。
maven依赖:
<dependency> <groupId>org.apache.servicemix.bundles</groupId> <artifactId>org.apache.servicemix.bundles.spring-context-support</artifactId> <version>4.0.7.RELEASE_2</version> </dependency> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>1.8.6</version> </dependency>
2:触发器在web.xml中配置:
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>webdemo1</display-name> <!-- 监听spring上下文容器 --> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <!-- 加载spring的xml配置文件到spring的上下文容器中 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext-*.xml</param-value> </context-param> <!-- 配置springmvc DispatcherServlet --> <servlet> <servlet-name>mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- 配置DispatcherServlet需要拦截的url --> <servlet-mapping> <servlet-name>mvc</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> </web-app>
3:springmvc的配置:
<?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:mvc="http://www.springframework.org/schema/mvc" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!-- springmvc配置 --> <!-- 通过component-scan让spring扫描package下的所有类,让spring的注解生效--> <context:component-scan base-package="com.tsxs"></context:component-scan> <!-- 配置springmvc的视图渲染器,让其前缀为:/ 后缀为: .jsp 将视图渲染到 /views/<method返回值>.jsp中 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
4:定时任务配置文件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd" default-autowire="byName" default-lazy-init="false"> <!-- default-autowire="byName" default-lazy-init="false"此两个值可以不配置 --> <description>Quartz Job Setting</description> <!-- A.配置调度的任务对应bean的id和自定义class--> <bean id="myQuartz" class="com.tsxs.tools.Quartz" /> <!-- B.配置调度任务对应的bean的id和执行的方法,作业不并发调度--> <bean id="myDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"> <property name="targetObject" ref="myQuartz" /> <property name="targetMethod" value="tips" /> <property name="concurrent" value="false" /> </bean> <!-- C.配置调度任务执行的触发的时间--> <bean id="myTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean"> <property name="jobDetail" ref="myDetail" /> <property name="cronExpression"> <!-- 每分钟的第3秒执行任务调度 --> <value>3 * * * * ?</value> </property> </bean> <!-- D.Quartz的调度工厂,调度工厂只能有一个,多个调度任务在list中添加 --> <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> <property name="triggers"> <list> <!-- 所有的调度列表--> <ref bean="myTrigger" /> <!-- <ref bean="myTrigger1" /> <ref bean="myTrigger2" /> 对应的bean配置:id="myDetail1" 和 id="myTrigger2" 可以对应的并行多配置-对应执行JavaBean和执行时间(各自触发time) --> </list> </property> </bean> </beans>
注:时间配置:可以看quartz配置或者网络搜索“quartz定时配置”
5:定时任务执行JavaBean:
package com.tsxs.tools; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import org.quartz.Job; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; public class Quartz { // public class Quartz implements Job{ //此处可以不实现Job接口的execute方法 // private Date date; /** * 定时任务,执行方法 * */ public void tips(){ String time = new SimpleDateFormat("MMM d,yyyy KK:mm:ss a",Locale.ENGLISH).format(System.currentTimeMillis()); System.out.println("time:"+time); } // @Override // public void execute(JobExecutionContext context) throws JobExecutionException { // date = context.getFireTime(); // } }
6:运行结果:
time:Jun 24,2015 00:05:03 PM time:Jun 24,2015 00:06:03 PM time:Jun 24,2015 00:07:03 PM time:Jun 24,2015 00:08:03 PM time:Jun 24,2015 00:09:03 PM
注:
①:定时任务执行JavaBean可以不实现Job接口的execute方法
②:在定时任务配置中:设置default-lazy-init="true",否则定时任务不触发,如果不明确指明default-lazy-init的值,默认是false
③:在定时任务配置中:设置default-autowire="byName"的属性,可能导致后台会报org.springframework.beans.factory.BeanCreationException错误(此时,就不能通过Bean名称自动注入,必须通过明确引用注入)