struts---validationXML验证

1、网页登录页面：

<s:form action="login">
						<s:textfield name="manager.name" label="用户名" />
						<s:textfield name="manager.pass" label="密码" />
						<s:textfield name="vercode" label="验证码" />
						<tr>
							<td colspan="2"><s:submit theme="simple" value="登录" /> <s:reset
									theme="simple" value="重填" /></td>
						</tr>
					</s:form>

2、Action及相关配置就省略了......
3、validationXML文件，和响应的Action放在一起，文加名为：nameAction-validation.xml

<?xml version="1.0" encoding="GBK"?>
<!DOCTYPE validators PUBLIC 
	"-//OpenSymphony Group//XWork Validator 1.0.3//EN"
	"http://www.opensymphony.com/xwork/xwork-validator-1.0.3.dtd">
<validators>
	<field name="manager.name">
		<field-validator type="required">
			<message>用户名必填！</message>
		</field-validator>
		<field-validator type="regex">
			<param name="expression"><![CDATA[[\u4e00-\u9fa5]{4,25}]]></param>
			<message>您输入的用户名只能是汉字，且长度必须在4到25之间</message>
		</field-validator>
	</field>
	<field name="manager.pass">
		<field-validator type="requiredstring">
			<message>密码必填！</message>
		</field-validator>
		<field-validator type="regex">
			<param name="expression"><![CDATA[(\w{4,25})]]></param>
			<message>您输入的密码只能是字母和数字，且长度必须在4到25之间</message>
		</field-validator>
	</field>
	<field name="vercode">
		<field-validator type="requiredstring">
			<message>验证码必填！</message>
		</field-validator>
		<field-validator type="regex">
			<param name="expression"><![CDATA[(\w{4,4})]]></param>
			<message>您输入的验证码只能是字母和数字，且长度必须在6位</message>
		</field-validator>
	</field>
</validators>

效果如下：