Spring的quartz定时器同一时刻重复执行二次的问题解决
最近用Spring的quartz定时器的时候，发现到时间后，任务总是重复执行两次，在tomcat或jboss下都如此。
打印出他们的hashcode，发现是不一样的，也就是说，在web容器启动的时候，重复启了两个quartz线程。
研究下来发现quartz确实会加载两次：
第一次：web容器启动的时候，读取applicationContext.xml文件时，会加载一次。
第二次：Spring本身会加载applicationContext.xml一次。
而我的quartz配置就是写在applicationContext.xml文件里的。
解决办法很简单
先把quartz配置信息提取出来，单独存成一个文件，比如applicationContext-quartz.xml
然后修改web.xml，让web容器启动时，可以加载该文件
这样quartz只会在web容器启动时加载一次，Spring不会再加载了。
web.xml配置如下：
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/applicationContext.xml,/WEB-INF/classes/applicationContext-timertask.xml</param-value>
</context-param>
<!-- 开启监听 -->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
把定时器的配置单独写成一个配置文件，在web容器启动的时候只加载一次
这个问题在Spring的TimerTask定时器下也会出现，解决方法也是如此，希望对各位大侠有所帮助
----------------------------------------------------------------------------------------------------------------------------参考以上。-----------------------------------------------------------
spring-scheduler.xml:
<?xmlversion="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:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd"
default-lazy-init="false">
<!-- 任务管理器 -->
<beans>
<!-- 要调用的工作类 -->
<bean id="quartzJob" class="com.xinwei.util.UpdateCurrentValueTask"></bean>
<!-- 定义调用对象和调用对象的方法 多个任务定义多个-->
<bean id="jobtask2"
class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<!-- 调用的类 -->
<property name="targetObject">
<ref bean="quartzJob" />
</property>
<!-- 调用类中的方法 -->
<property name="targetMethod">
<value>doTask</value>
</property>
</bean>
<!-- 定义触发时间 -->
<bean id="doTime2"
class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail">
<ref bean="jobtask2" />
</property>
<!-- cron表达式 每天24:00运行一次 -->
<property name="cronExpression" value="0 0 0 * * ?" />
</bean>
<!-- 总管理类 如果将lazy-init='false'那么容器启动就会执行调度程序 -->
<bean id="startQuertz" lazy-init="false" autowire="no"
class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="doTime2"/>
</list>
</property>
</bean>
</beans>
</beans>
web.xml..
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>security</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath*:/applicationContext.xml,
classpath*:/applicationContext-shiro.xml,
classpath*:/spring-scheduler.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 主要注册request，在普通类中获取request对象 -->
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 过滤参数，将前台传输的参数request. page.去掉 -->
<filter>
<filter-name>ParameterFilter</filter-name>
<filter-class>com.xinwei.filter.ParameterFilter</filter-class>
<init-param>
<param-name>blackListURL</param-name> <!-- 配置黑名单url 表示不走过滤器的url order：1 -->
<param-value>
/js/**
/css/**
/styles/**
/images/**
/plugins/**
/fonts/**
/login/timeout
/logout
/views/**
</param-value>
</init-param>
<init-param>
<param-name>whiteListURL</param-name> <!-- 配置白名单url 表示走过滤器的url order：2-->
<param-value>
/**
</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>ParameterFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- pagination filter -->
<filter>
<filter-name>PageFilter</filter-name>
<filter-class>com.xinwei.filter.PageFilter</filter-class>
<init-param>
<param-name>blackListURL</param-name> <!-- 配置黑名单url 表示不走过滤器的url order：1 -->
<param-value></param-value>
</init-param>
<init-param>
<param-name>whiteListURL</param-name> <!-- 配置白名单url 表示走过滤器的url order：2-->
<param-value>
/**/list
</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>PageFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- <filter> <filter-name>openEntityManagerInViewFilter</filter-name> <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
</filter> <filter-mapping> <filter-name>openEntityManagerInViewFilter</filter-name>
<url-pattern>/*</url-pattern> </filter-mapping> -->
<filter>
<filter-name>shiroFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
<init-param>
<param-name>targetFilterLifecycle</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>shiroFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>springServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:/spring-mvc.xml</param-value>
</init-param>
<init-param>
<param-name>dispatchOptionsRequest</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>hessianServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/server/hessian-server.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>hessianServlet</servlet-name>
<url-pattern>/hessian/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<error-page>
<exception-type>java.lang.Throwable</exception-type>
<location>/WEB-INF/views/error/500.jsp</location>
</error-page>
<error-page>
<error-code>500</error-code>
<location>/WEB-INF/views/error/500.jsp</location>
</error-page>
<error-page>
<error-code>404</error-code>
<location>/WEB-INF/views/error/404.jsp</location>
</error-page>
<error-page>
<error-code>403</error-code>
<location>/WEB-INF/views/error/403.jsp</location>
</error-page>
</web-app>