在spring mvc項目中缺少dispatcher-servlet.xml

Question

我在Spring工具套件中創建了一個Spring mvc項目。我正在關注YouTube教程視頻，視頻的作者是指將一些文本添加到dispatcher-servlet.xml中，但是在創建Spring項目時並未創建dispatcher-servlet.xml。這是爲什麼？它可以被稱爲別的東西嗎？

Answer 1

我認爲有幾種方法可以創建簡單的spring web項目。我知道的一些方式是：

1. 從eclipse（STS）創建動態Web項目/並把春天lirary它。

2. 形式STS文件/新建/ Maven項目（org.apache.maven.archetypes）/填寫組ID，工件ID v.v ..

3. 從STS文件/新建/ Spring項目/簡單的Spring Web Maven的。

4. Spring Roo的命令web mvc setup

不屬於如何創建項目後，創建我們總是有文件的web.xml web.xml中的

內容類似這樣

<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"> 

<!-- The most important thing to understand is that there are 2 layers of application contexts, 
and they each have default XML files to load beans from 
1.Servlet Application Context 
2.Root application context 
    --> 

    <display-name>Archetype Created Web Application</display-name> 
    <!-- 
    The Each Spring DispatcherServlet defined in the web.xml file gets its own application context. 
    If there is a Root application context (i.e. if a ContextLoaderListener is defined), then 
    that will be the parent of the servlet context and the beans will be available for use in 
    the servlet context(s). By default, DispatcherServlet loads beans from the file 
    /WEB-INF/<servlet-name>-servlet.xml --> 
    <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/dispatcher-servlet.xml</param-value> 
     </init-param> 
     <load-on-startup>1</load-on-startup> 
    </servlet> 
    <servlet-mapping> 
     <servlet-name>dispatcher</servlet-name> 
     <url-pattern>*.html</url-pattern> 
    </servlet-mapping> 

    <session-config> 
     <session-timeout> 
      30 
     </session-timeout> 
    </session-config> 
    <welcome-file-list> 
     <welcome-file>redirect.jsp</welcome-file> 
    </welcome-file-list> 

    <!--The Root application context is created 
     when you specify a ContextLoaderListener in your web.xml file. If you don't 
     specify a listener, then there will be no Root context (which is valid). 
     It allows you to define beans that will be available to all the servlet 
     contexts.REMEMBER: This context is OPTIONAL, and will only be created if 
     you specify a ContextLoaderListener --> 
    <listener> 
     <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
    </listener> 
    <context-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value> 
      /WEB-INF/spring-security.xml, 
      /WEB-INF/spring-database.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> 
</web-app> 

聲明

<init-param> 
     <param-name>contextConfigLocation</param-name> 
     <param-value>WEB-INF/dispatcher-servlet.xml</param-value> 
</init-param> 

是dispatcher-servlet xml配置文件的位置。如果缺少此聲明，則缺省值將是direcrory webapp（或WebContent）中的文件名dispatcher-servlet.xml。如果缺少dispatcher-servlet.xml，不用擔心，只需在那裏創建文件即可。我們可以把這個declation到web.xml文件如上

<init-param> 
      <param-name>contextConfigLocation</param-name> 
      <param-value>WEB-INF/example/funny.xml</param-value> 
</init-param> 

認爲它可以幫助

改變dispathcher servlet的XML配置文件的名稱和位置