Servlet 在 web.xml 中设置配置信息遇到的问题

web.xml 中的配置

<servlet>
  <init-param>
        <param-name>path</param-name>
        <param-value>conf.txt</param-value>
  </init-param>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>LDemo</servlet-name>
    <servlet-class>com.java.servlet.life.LDemo</servlet-class>

    <load-on-startup>1</load-on-startup>

  </servlet>

报错信息：

cvc-complex-type.2.4.a: Invalid content was found starting with element 'init-param'. One of '{"http://
 java.sun.com/xml/ns/javaee":description, "http://java.sun.com/xml/ns/javaee":display-name, "http://
 java.sun.com/xml/ns/javaee":icon, "http://java.sun.com/xml/ns/javaee":servlet-name}' is expected.

一直报错，查找之后发现并不是标签名写错了，但是老是报: Invalid content was found 的错误，后来发现是< init-param >位置放错了，必须放在< servlet-class >< servlet-name>之后 < load-on-startup>之前，正确配置如下

 <servlet>    
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>LDemo</servlet-name>
    <servlet-class>com.java.servlet.life.LDemo</servlet-class>
   <init-param>
        <param-name>path</param-name>
        <param-value>conf.txt</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>     
  </servlet