我正在使用 3.1.2 版开发一个 spring 应用程序,使用 tomcat 7 作为 servlet 管理器。我注意到豆子被创建了两次,我不知道如何防止这种情况。我知道问题出在我的 web.xml 或应用程序上下文中,但我一直无法找到重复的来源。
从启动时的 tomcat 日志中,我看到以下内容(解释为空格):
May 24, 2013 9:33:03 AM org.springframework.web.context.ContextLoader initWebApplicationContext
INFO: Root WebApplicationContext: initialization started
May 24, 2013 9:33:03 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing Root WebApplicationContext: startup date [Fri May 24 09:33:03 CDT 2013]; root of context hierarchy
May 24, 2013 9:33:03 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/kpi-reporter-servlet.xml]
May 24, 2013 9:33:03 AM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@df9978: defining beans [...]; root of factory hierarchy
May 24, 2013 9:33:04 AM org.springframework.web.context.ContextLoader initWebApplicationContext
INFO: Root WebApplicationContext: initialization completed in 1260 ms
May 24, 2013 9:33:04 AM org.springframework.web.servlet.FrameworkServlet initServletBean
INFO: FrameworkServlet 'kpi-reporter': initialization started
May 24, 2013 9:33:04 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing WebApplicationContext for namespace 'kpi-reporter-servlet': startup date [Fri May 24 09:33:04 CDT 2013]; parent: Root WebApplicationContext
May 24, 2013 9:33:04 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from ServletContext resource [/WEB-INF/kpi-reporter-servlet.xml]
May 24, 2013 9:33:04 AM org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@2821db: defining beans [...]; parent: org.springframework.beans.factory.support.DefaultListableBeanFactory@df9978
这是我的 web.xml 和应用程序上下文配置:
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>kpi-reporter</display-name>
<servlet>
<servlet-name>kpi-reporter</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>kpi-reporter</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
<url-pattern>*.gif</url-pattern>
<url-pattern>*.js</url-pattern>
<url-pattern>*.png</url-pattern>
</servlet-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/kpi-reporter-servlet.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
</web-app>
kpi-reporter-servlet.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:component-scan base-package="."/>
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
如果我删除 kpi-reporter-servlet.xml 中的语句,则根本不会定义 bean。如果我将上下文语句移动到 web.xml(连同所需的导入),它仍然会被定义两次。我怀疑 web.xml 在启动过程中被调用了两次。
我检查了 webapps 目录,我只有一个文件和目录,用于部署应用程序的 .war 文件,以及它被解压缩到的目录。
我开发的其他 .war 应用程序也有这种行为,尽管它们具有与之关联的类似 xml 文件。
有谁知道为什么会发生这种情况?我被难住了。
在此先感谢,马克斯