CODEWITHSUNDEEP
servletsweb.xml
Amritesh Singh
Amritesh Singh

Reputation: 391

Getting error: The content of element type "web-app" must match,

When I build my project in Eclipse Helios Service Release 2, I get an error in my web.xml. Please suggest what I have to do for this. In my project I am using DTD 2.2. The error is below.

The content of element type "web-app" must match "(icon?,display- name?,description?,distributable?,context-param*,servlet*,servlet-mapping*,session-config?,mime- mapping*,welcome-file-list?,error-page*,taglib*,resource-ref*,security-constraint*,login-config?,security- role*,env-entry*,ejb-ref*)".

Upvotes: 39

Views: 41208

Answers (3)

alijandro
alijandro

Reputation: 12167

I have the same issue when I integrate spring to struts2 in Eclipse. After some testing, I found it's the problem of tag's order in web.xml file. The following file has the error

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <filter>
        <filter-name>struts</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
        <init-param>
            <param-name>struts.devMode</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>struts</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

If I changed the order to

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>
    <filter>
        <filter-name>struts</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
        <init-param>
            <param-name>struts.devMode</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>struts</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

The error will be eliminated.

Hope this will be helpful to the people who encounter the same problem.

Upvotes: 4

BalusC
BalusC

Reputation: 1109422

The error message tells you in detail in what order the elements are supposed to be placed and how many of them are allowed. In other words, the ordering or amount of the elements inside the <web-app> of your web.xml is incorrect. For example, as per the error message, <servlet> needs to go before <servlet-mapping>. The ? suffix means that there may be zero or one of them. The * suffix means that there may be zero or many of them.

So, the example below is invalid: 

<servlet>...</servlet>
<servlet-mapping>...</servlet-mapping>

<servlet>...</servlet>
<servlet-mapping>...</servlet-mapping>

<servlet>...</servlet>
<servlet-mapping>...</servlet-mapping>

While the example below is valid: 

<servlet>...</servlet>
<servlet>...</servlet>
<servlet>...</servlet>

<servlet-mapping>...</servlet-mapping>
<servlet-mapping>...</servlet-mapping>
<servlet-mapping>...</servlet-mapping>

Upvotes: 79

Darth Jon
Darth Jon

Reputation: 423

If anyone's interested I received the same exception for error-page. This node needs to go after servlet, but before servlet-mapping.

Upvotes: 4

Related Questions