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An Example struts.xml Configuration File

struts.xml
Error rendering macro 'code': Invalid value specified for parameter 'java.lang.NullPointerException'

<struts>
    <package name="person" extends="struts-default" namespace="/person" />
</struts>

(lightbulb) For more about configuration details, see Configuration Elements

The Struts 2 Document Type Definition (DTD)

Struts 2.3 DTD
Error rendering macro 'code': Invalid value specified for parameter 'java.lang.NullPointerException'

<!--
   Struts configuration DTD.
   Use the following DOCTYPE

   <!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
-->

<!ELEMENT struts ((package|include|bean|constant)*, unknown-handler-stack?)>
<!ATTLIST struts
    order CDATA #IMPLIED
>

<!ELEMENT package (result-types?, interceptors?, default-interceptor-ref?, default-action-ref?, default-class-ref?, global-results?, global-exception-mappings?, action*)>
<!ATTLIST package
    name CDATA #REQUIRED
    extends CDATA #IMPLIED
    namespace CDATA #IMPLIED
    abstract CDATA #IMPLIED
    strict-method-invocation CDATA #IMPLIED
    externalReferenceResolver NMTOKEN #IMPLIED
>

<!ELEMENT result-types (result-type+)>

<!ELEMENT result-type (param*)>
<!ATTLIST result-type
    name CDATA #REQUIRED
    class CDATA #REQUIRED
    default (true|false) "false"
>

<!ELEMENT interceptors (interceptor|interceptor-stack)+>

<!ELEMENT interceptor (param*)>
<!ATTLIST interceptor
    name CDATA #REQUIRED
    class CDATA #REQUIRED
>

<!ELEMENT interceptor-stack (interceptor-ref*)>
<!ATTLIST interceptor-stack
    name CDATA #REQUIRED
>

<!ELEMENT interceptor-ref (param*)>
<!ATTLIST interceptor-ref
    name CDATA #REQUIRED
>

<!ELEMENT default-interceptor-ref (#PCDATA)>
<!ATTLIST default-interceptor-ref
    name CDATA #REQUIRED
>

<!ELEMENT default-action-ref (#PCDATA)>
<!ATTLIST default-action-ref
    name CDATA #REQUIRED
>

<!ELEMENT default-class-ref (#PCDATA)>
<!ATTLIST default-class-ref
    class CDATA #REQUIRED
>

<!ELEMENT global-results (result+)>

<!ELEMENT global-exception-mappings (exception-mapping+)>

<!ELEMENT action ((param|result|interceptor-ref|exception-mapping)*,allowed-methods?)>
<!ATTLIST action
    name CDATA #REQUIRED
    class CDATA #IMPLIED
    method CDATA #IMPLIED
    converter CDATA #IMPLIED
>

<!ELEMENT param (#PCDATA)>
<!ATTLIST param
    name CDATA #REQUIRED
>

<!ELEMENT result (#PCDATA|param)*>
<!ATTLIST result
    name CDATA #IMPLIED
    type CDATA #IMPLIED
>

<!ELEMENT exception-mapping (#PCDATA|param)*>
<!ATTLIST exception-mapping
    name CDATA #IMPLIED
    exception CDATA #REQUIRED
    result CDATA #REQUIRED
>

<!ELEMENT allowed-methods (#PCDATA)>

<!ELEMENT include (#PCDATA)>
<!ATTLIST include
    file CDATA #REQUIRED
>

<!ELEMENT bean (#PCDATA)>
<!ATTLIST bean
    type CDATA #IMPLIED
    name CDATA #IMPLIED
    class CDATA #REQUIRED
    scope CDATA #IMPLIED
    static CDATA #IMPLIED
    optional CDATA #IMPLIED
>

<!ELEMENT constant (#PCDATA)>
<!ATTLIST constant
    name CDATA #REQUIRED
    value CDATA #REQUIRED
>

<!ELEMENT unknown-handler-stack (unknown-handler-ref*)>
<!ELEMENT unknown-handler-ref (#PCDATA)>
<!ATTLIST unknown-handler-ref
    name CDATA #REQUIRED
>

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