Struts2输入校验(二)----验证框架

来源：岁月联盟编辑：zhuzhu 时间：2009-03-20

　　一文件名约定:

　　1) 验证XML的文件名: Action类名-validation.xml , 并与相关的Action类放在一起.

　　2) 当一个Action中有多个业务方法时 : Action 类名-映射名-validation.xml

　　什么是映射名:<action name="login".../> ,name属性的值:login就是映射名, 千万注意,很多人写错

　　例子:

　　URL是:http://localhost/struts/user_addUser. action

　　struts.xml是:

　　Xml代码　　

		<action name="user_*" class="ssh.org.web.UserAction" method="{1}">			<result name="success">/user/success.jsp</result>			<result name="input">/user/user.jsp</result>					</action>

　　匹配后<action name="user_*".../>　实为<action name="user_addUser" .../>

　　所以验证框架XML文件名是: UserAction-user_addUser -validation.xml

　　二验证不通过时, 　会执行addFieldError ()方法,　在JSP页面, 要用 <s:fielderror />显示信息.

　　关于addFieldError,请看第6讲:6 addActionError与addFieldError

　　三例子

　　Registration-validation.xml　 : 用于校验Registration.java类

　　Xml代码　　　

<?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><!--       非字段校验器　     <validator type="requiredstring">		<param name="fieldName">username</param>		<message>username should not be blank!</message>	</validator>		<validator type="stringlength">		<param name="fieldName">username</param>		<param name="minLength">6</param>		<param name="maxLength">10</param>		<message>username should be between ${minLength} and ${maxLength}</message>	</validator> -->		字段校验器-->　     <field name="username">		<field-validator type="requiredstring">			<param name="trim">true</param>			<message>username should not be blank!</message>		</field-validator>				<field-validator type="stringlength">			<param name="minLength">6</param>			<param name="maxLength">10</param>			<message>username should be between ${minLength} and ${maxLength}</message>		</field-validator>	</field>	<field name="password">		<field-validator type="requiredstring">			<message>password should not be blank!</message>		</field-validator>				<field-validator type="stringlength">			<param name="minLength">6</param>			<param name="maxLength">10</param>			<message>password should be between ${minLength} and ${maxLength}</message>		</field-validator>	</field>		<field name="repassword">		<field-validator type="requiredstring">			<message>repassword should not be blank!</message>		</field-validator>				<field-validator type="stringlength">			<param name="minLength">6</param>			<param name="maxLength">10</param>			<message>repassword should be between ${minLength} and ${maxLength}</message>		</field-validator>	</field>		<field name="age">		<field-validator type="required">			<message>age should not be blank!</message>		</field-validator>			<field-validator type="int">			<param name="min">1</param>			<param name="max">150</param>			<message>age should be between ${min} and ${max}</message>		</field-validator>	</field>		<field name="birthday">		<field-validator type="required">			<message>birthday should not be blank!</message>		</field-validator>				<field-validator type="date">			<param name="min">2001-01-01</param>			<param name="max">2003-12-31</param>			<message>birthday should be between ${min} and ${max}</message>		</field-validator>	</field>		<field name="graduation">		<field-validator type="required">			<message>graduation should not be blank!</message>		</field-validator>				<field-validator type="date">			<param name="min">2005-01-01</param>			<param name="max">2007-12-31</param>			<message>graduation should be between ${min} and ${max}</message>		</field-validator>	</field>		</validators>

　　四　 Struts2内建的校验器有:

　　Xml代码