Struts2 xxAction-validation.xml使用

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
	"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

<validators>
	<field name="user.username">
		<field-validator type="requiredstring">
			<message （国际化用到key）key="username.required">not null</message>
		</field-validator>
	</field>
	
	<field name="user.password">
		<field-validator type="requiredstring">
			<message>password not null</message>
		</field-validator>
	</field>
</validators>

　　命名为xxAction(与Action类名相同)-validation.xml，即可使用