为什么web.xml的“context-param”不能有字符[children]？ [英] Why web.xml 'context-param' cannot have character [children]?

问题描述

我只是好奇，这个 web.xml 代码发生了什么，我有这个错误 cvc-complex-type.2.3：元素的上下文-param'不能包含字符[children]，因为类型的内容类型是仅元素。在Eclipse（juno版本）标记视图中的。

这是代码：

 <？xml version = 1.0encoding =UTF-8？> 
< web-app id =WebApp_ID
 version =2.5
 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的/网络app_2_5.xsd> 
 
< display-name> Spring安全Web应用程序（系列）< / display-name> 
 
<！ - 具体停止tomcat上多个应用程序的麻烦 - > 
< context-param> 
< param-name> webAppRootKey< / param-name> 
< param-value> customauth_root< / param-value> 
< / context-param> 
 
<！ - 定义由ContextLoaderListener应用的根应用程序上下文
的XML文件的位置。 - > 
< context-param> 
< param-name> contextConfigLocation< / param-name> 
< param-value> 
 WEB-INF / applicationContext.xml 
 WEB-INF / applicationContext-security.xml 
< / param-value> 
< / context-param> 
 
<！ - 在启动时加载此Web应用程序的根应用程序上下文。 
应用程序上下文可通过WebApplicationContextUtils.getWebApplicationContext（servletContext）获得。 - > 
< listener> 
< listener-class> org.springframework.web.context.ContextLoaderListener< / listener-class> 
< / listener> 
 
< listener> 
< listener-class> 
 org.springframework.security.web.session.HttpSessionEventPublisher< / listener-class> 
< / listener> 
 
< 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> 
 
<！ - 提供核心MVC应用控制器。请参阅customauth-servlet.xml。 - > 
< servlet> 
< servlet-name> customauth< / servlet-name> 
< servlet-class> org.springframework.web.servlet.DispatcherServlet< / servlet-class> 
< load-on-startup> 1< / load-on-startup> 
< / servlet> 
 
< servlet-mapping> 
< servlet-name> customauth< / servlet-name> 
< url-pattern> *。htm< / url-pattern> 
< / servlet-mapping> 
 
< servlet-mapping> 
< servlet-name> customauth< / servlet-name> 
< url-pattern> *。do< / url-pattern> 
< / servlet-mapping> 
 
< welcome-file-list> 
< welcome-file> index.jsp< / welcome-file> 
< / welcome-file-list> 
 
< / web-app> 
  

解决方案

对于初学者，您在XML节点中使用非法字符param-value

您不能使用/，<和节点中的其他字符，因为它会破坏XML文档的解析。

您应该在XML节点内的值周围使用CDATA或PCDATA包装。 p>

例如

 < param-value><！[CDATA [ 
 WEB-INF / applicationContext.xml 
 WEB-INF / applicationContext-security.xml]]> 
< / param-value> 
  

这是导致您的问题。

I am just curious what happen to this web.xml code where I have this error cvc-complex-type.2.3: Element 'context-param' cannot have character [children], because the type's content type is element-only. in the Eclipse (juno version) Markers view.

Here is the code:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" 
        version="2.5" 
        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_2_5.xsd">

  <display-name>Spring security web application (series)</display-name>

  <!-- to specifically stop trouble with multiple apps on tomcat -->
  <context-param>
    <param-name>webAppRootKey</param-name>
    <param-value>customauth_root</param-value>
  </context-param>

  <!-- Location of the XML file that defines the root application context
    applied by ContextLoaderListener. -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        WEB-INF/applicationContext.xml
        WEB-INF/applicationContext-security.xml
        </param-value>
  </context-param>

  <!-- Loads the root application context of this web app at startup. The
    application context is then available via WebApplicationContextUtils.getWebApplicationContext(servletContext). -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <listener>
    <listener-class>
      org.springframework.security.web.session.HttpSessionEventPublisher</listener-class>
  </listener>

  <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>

  <!-- Provides core MVC application controller. See customauth-servlet.xml. -->
  <servlet>
    <servlet-name>customauth</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>customauth</servlet-name>
    <url-pattern>*.htm</url-pattern>
  </servlet-mapping>

  <servlet-mapping>
    <servlet-name>customauth</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

</web-app>

解决方案

For starters you are using illegal characters inside your XML node param-value

You are not allowed to use "/", "<" and other chars inside a node as it will break the parsing of the XML document.

You should be using CDATA or PCDATA wrappers around your value inside the XML node.

e.g.

    <param-value><![CDATA[
        WEB-INF/applicationContext.xml
        WEB-INF/applicationContext-security.xml]]>
    </param-value>

This was what was causing your problem.

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