Java Springbean被实例化两次

我有一个Springbean重复实例化的问题。 通常我不会介意，但问题是这是一个调度bean，所以我们将任务调度两次

我们在pom文件中使用Spring3.2.2.RELEASE。 我们有context.xml。 我们使用XML配置，而不是注释。 在我的尝试中，我将所有bean声明移动到一个上下文文件下，该文件在web.xml中声明

下面是servlet.xml。它是空的：

<?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:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/beans     
    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd    ">

</beans>

为什么春天创造了两个豆子？ 我只有一个上下文文件。 在导入文件中，没有提到计划的bean任务

---

感谢您的帮助。

您正在扫描所有组件两次。

include

并不意味着排除任何仍然检测到的内容。添加

使用default filters=“false”

以禁用对包含模式的任何其他内容的检测。感谢您的及时响应。我在context:component scan base package=“package to scan”中添加了use default filters=“false”，但我仍然在日志中看到两次相同的初始化。您在哪里添加了它，并确保在根上下文中排除了

@Controller

s。还要确保没有两次加载xml文件。我们已经设法解决了这个问题。我们看到整个上下文被初始化了两次。我们通过将HOST设置为root更改了tomcat的server.xml。这场爆发的战争有一些问题，我们正在努力解决。

<?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"
    id="WebApp_ID" version="2.5">
    <display-name>The App</display-name>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            META-INF/application-ctx.xml,WEB-INF/security-context.xml
        </param-value>
    </context-param>

    <filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    ... Other filters and servlets

</web-app>

<?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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans     
    http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    http://www.springframework.org/schema/context  
    http://www.springframework.org/schema/context/spring-context-3.2.xsd
    http://www.springframework.org/schema/mvc 
    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <import resource="classpath:META-INF/management-application-ctx.xml"/>
    <import resource="classpath:META-INF/lucene-application-ctx.xml"/>
    <import resource="classpath:META-INF/serving-application-ctx.xml" />
    <import resource="classpath:META-INF/tracking-application-ctx.xml" />
    <import resource="scheduling-ctx.xml"/>

    <!-- configuration  --> 
    <bean id="propertyConfigurer" class="some class">
        <property name="location">
            <value>config.xml</value>
        </property>
        <property name="propertiesPersister" ref="persister" />
    </bean>

    <bean id="persister" class="some other class">
        <property name="configSchemaLocation">
            <value>config.xsd</value>
        </property>
    </bean>

    ... other beans


    <!-- This was in the servlet.xml -->

        <mvc:annotation-driven />
    <context:component-scan base-package="package to scan">
        <context:include-filter expression="org.springframework.stereotype.Controller"
            type="annotation" />
    </context:component-scan>

    <bean id="handlerMapping"
        class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
        <property name="detectHandlersInAncestorContexts" value="true" />
    </bean>

    <mvc:resources mapping="/styles/**" location="/styles/" />
    <mvc:resources mapping="/js/**" location="/js/" />
    <mvc:resources mapping="/static/**" location="/static/" />
    <mvc:resources mapping="/images/**" location="/images/" />
    <mvc:resources mapping="/akamai/**" location="/static/akamai/" />

    <mvc:interceptors>
        <bean
            class="org.springframework.mobile.device.DeviceResolverHandlerInterceptor" />
    </mvc:interceptors>

    <bean id="messageSource"
        class="org.springframework.context.support.ResourceBundleMessageSource">
        <property name="basename">
            <value>messages</value>
        </property>
    </bean>

    <bean
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="jsonHttpMessageConverter" />
            </list>
        </property>
    </bean>

    <bean id="jsonHttpMessageConverter"
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
        <property name="supportedMediaTypes" value="application/json" />
    </bean>

    <bean class="org.springframework.web.servlet.view.BeanNameViewResolver" />

    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="exposeContextBeansAsAttributes" value="true" />
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>


</beans>

<?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:task="http://www.springframework.org/schema/task"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.2.xsd">

    <task:scheduled-tasks scheduler="aScheduler" >
        <task:scheduled ref="someBean" method="runIndexTask"
            fixed-delay="300000" initial-delay="300000" />
    </task:scheduled-tasks>

    <task:scheduler id="aScheduler" pool-size="10"/>

    <bean class="org.springframework.scheduling.timer.TimerFactoryBean">
        <property name="scheduledTimerTasks">
            <list>
                <ref local="credentialScheduledTask" />
            </list>
        </property>
    </bean>

    <bean id="credentialScheduledTask" class="org.springframework.scheduling.timer.ScheduledTimerTask">
        <property name="delay" value="10000" />
        <property name="period"
            value="${core:configuration:credentialScheduledTaskPeriod}" />
        <property name="timerTask" ref="cachedCredentialDao" />
    </bean>
</beans>

26/10/2014 08:01:15,491 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'aScheduler'
26/10/2014 08:01:15,491 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating instance of bean 'aScheduler'
26/10/2014 08:01:15,494 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Eagerly caching bean 'aScheduler' to allow for resolving potential circular references
26/10/2014 08:01:15,501 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Invoking afterPropertiesSet() on bean with name 'aScheduler'
26/10/2014 08:01:15,501 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Finished creating instance of bean 'aScheduler'
26/10/2014 08:01:15,502 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'aScheduler'
26/10/2014 08:01:16,485 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Returning cached instance of singleton bean 'aScheduler'
26/10/2014 08:02:16,593 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'aScheduler'
26/10/2014 08:02:16,593 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating instance of bean 'aScheduler'
26/10/2014 08:02:16,597 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Eagerly caching bean 'aScheduler' to allow for resolving potential circular references
26/10/2014 08:02:16,605 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Invoking afterPropertiesSet() on bean with name 'aScheduler'
26/10/2014 08:02:16,605 [localhost-startStop-1] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Finished creating instance of bean 'aScheduler'