struts-config.xmlについて

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">

<struts-config>
	<controller
		processorClass="org.seasar.struts.processor.S2RequestProcessor" />

	<message-resources parameter="application" />

	<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
		<set-property property="pathnames"
			value="/WEB-INF/validator-rules.xml, /WEB-INF/validation.xml" />  
	</plug-in>
	
	<plug-in
		className="org.seasar.struts.plugin.AutoStrutsConfigRegisterPlugIn">
		<set-property property="enableJar" value="false" />
	</plug-in>

</struts-config>

plug-in の各順番を逆にするとnull pointerが起こるので注意すること。