Struts2校验框架，有效的xml（字段优先）

Struts2自带的校验框架有字段优先和校验器优先两种：

字段优先：1.要写一个xml命名规则，以对应的action的名字开头加上"-validation.properties"。例如action的名字为Register。则xml名字为：

Register-validation.properties。此配置文件与action在同一个package中。

                  2.xml内容如下：                         

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
        "-//Apache Struts//XWork Validator 1.0.2//EN"
        "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<validators>
<!--Struts2自带的校验框架方法： 共有两种校验方法 1）field字段优先  2）校验器优先     下面是字段优先 -->
	<field name="username">
		<field-validator type="requiredstring">
			<message>用户名不得为空!!</message>
		</field-validator>
		
		<field-validator type="stringlength">
			<param name="minLength">4</param>
			<param name="maxLength">10</param>
			<!-- key的提示信息放在了资源信息中 如果是提交时汉语优先则调用package_zh_CN.properties
			如果是英文优先则调用package_en_US.properties配置文件
			 -->
			<message key="username.invalid"></message>
		</field-validator>
	
	</field>
	
	<field name="password">
		<field-validator type="requiredstring">
			<message>密码不得为空!!</message>
		</field-validator>
		
		<field-validator type="stringlength">
			<param name="minLength">4</param>
			<param name="maxLength">10</param>
			<message>密码长度必须在4到6之间！！</message>
		</field-validator>
	</field>
	
	<field name="age">
		<field-validator type="required">
			<message>年龄必填！</message>
		</field-validator>
		<field-validator type="int">
			<param name="min">10</param>
			<param name="max">50</param>
			<message>年龄必须在${min}到${max}岁之间！</message>
		</field-validator>
	</field>
	
	<field name="birthday">
		<field-validator type="required">
			<message>出生日期必填</message>
		</field-validator>
		<field-validator type="date">
			<param name="min">2000-01-01</param>
			<param name="max">2013-01-01</param>
			<message>出生日期必须在2000-01-01到2013-01-01之间</message>
		</field-validator>
	</field>



</validators>        
        
        
        
        
        

3.massage中key属性对应的语言提示配置文件，key的提示信息放在了资源信息中 如果是提交时汉语优先则调用package_zh_CN.properties如果是英文优先则调用package_en_US.properties配置文件。此配置文件与action在同一个package中。

#package_en_US.properties中的内容

username.invalid=Username invalid

package_zh_CN.properties中的内容：

username.invalid=\u7528\u6237\u540D\u4E0D\u5408\u6CD5

4.validator中的type属性值在xwork-core-2.3.4.jar中的com.opensymphony.xwork2.validator.validators包的
default.xml中可以找到

<validators>
    <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>
    <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>
    <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>
    <validator name="long" class="com.opensymphony.xwork2.validator.validators.LongRangeFieldValidator"/>
    <validator name="short" class="com.opensymphony.xwork2.validator.validators.ShortRangeFieldValidator"/>
    <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>
    <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>
    <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>
    <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>
    <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>
    <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>
    <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>
    <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>
    <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>
    <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>
    <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>
</validators>