基于XML配置方式实现输入校验

在JSP页面中导入<%@ taglib uri="/struts-tags" prefix="s" %>标签

在页面中显示信息用   验证的信息:<s:fielderror/>

在action中创建一个继承ActionSupport的UserInfoAction.java类

然后再action包下创建一个UserInfoAction-validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!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="txtName">
        <field-validator type="requiredstring">
            <param name="trim">true</param>
            <message>用户名不能为空!</message>
        </field-validator>
    </field>
    <field name="email">
    	<field-validator type="requiredstring">
    		<param name="trim">true</param>
    		<message>邮箱不能为空！</message>
    	</field-validator>
    	<field-validator type="email">
    		<message>邮箱格式不争取</message>
    	</field-validator>
    </field>
    <field name="telePhone">
    	<field-validator type="requiredstring">
    		<param name="trim">true</param>
    		<message>电话不能为空</message>
    	</field-validator>
    	<field-validator type="regex">
    		<param name="expression"><![CDATA[^1[358][0-9]{9}$]]></param>
    		<message>无效的电话</message>
    	</field-validator>
    </field>
</validators>

在STRUTS.XML中配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
	<package name="base" namespace="" extends="struts-default">
		<action name="user_*" method="{1}" class="action.UserInfoAction">
			<result name="ok">/index.jsp</result>
			<result name="input">/index.jsp</result>
		</action>
	</package>
</struts>