更改dispatcher-servlet.xml的位置不起作用

Question

在web.xml中已经将dispatcher servlet的位置定义为context-param中的[/web-inf/config/dispatcher-servlet.xml]，这仍然是它查找[/web-inf/dispatcher-servlet.xml]的原因。

在[/web-inf/config/dispatcher-servlet.xml]和[/web-inf/dispatcher-servlet.xml]上使用dipatcher-servlet时，这将起作用，然后只有它才起作用。

它是怎么做出这样的行为的？如果将其当前位置更改为[/WEB-INF/CONFIG/Dispatcher-Servlet.xml]，为什么还要在这个[/WEB-INF/Dispatcher-Servlet.xml]位置进行搜索？

web.xml

<servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>  

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

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

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/config/dispatcher-servlet.xml,
            /WEB-INF/config/spring-security.xml,
            /WEB-INF/config/database-config.xml
        </param-value>
    </context-param>

错误：

May 01, 2016 3:55:49 AM org.apache.catalina.core.ApplicationContext log
INFO: Initializing Spring FrameworkServlet 'dispatcher'
2016-05-01 03:55:49 INFO  DispatcherServlet:488 - FrameworkServlet 'dispatcher': initialization started
2016-05-01 03:55:49 INFO  XmlWebApplicationContext:578 - Refreshing WebApplicationContext for namespace 'dispatcher-servlet': startup date [Sun May 01 03:55:49 IST 2016]; parent: Root WebApplicationContext
2016-05-01 03:55:49 INFO  XmlBeanDefinitionReader:317 - Loading XML bean definitions from ServletContext resource [/WEB-INF/dispatcher-servlet.xml]
May 01, 2016 3:55:49 AM org.apache.catalina.core.ApplicationContext log
SEVERE: StandardWrapper.Throwable
org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from ServletContext resource [/WEB-INF/dispatcher-servlet.xml]; nested exception is java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/dispatcher-servlet.xml]
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:344)
    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181)

Answer 1

您已经定义了Dispatcher servlet,如下所示：

<servlet>
   <servlet-name>dispatcher</servlet-name>
   <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
   <load-on-startup>1</load-on-startup>
</servlet>

因此，默认情况下，它将在类路径（servlet名称后加上'-servlet.xml')中查找dispatcher servlet文件（dispatcher-servlet.xml）。

您已经定义了dispatcher-servlet.xml，但将其保存在/web-inf/config/的位置下。因此，为dispatcher servlet xml文件提供此位置。下面的配置应该对您有效。

<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>
        org.springframework.web.servlet.DispatcherServlet
    </servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            /WEB-INF/conf/dispatcher-servlet.xml
        </param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>