struts2验证框架方法一

struts2验证框架方法一：

*只有一个文件
*在action所对应的包下面建立****-validation.xml(****是action的类名)，如：SaveUserAction-validation.xml
*如果是多个方法的action，则这样写：action类名-方法名-validation.xml

============================如下配置================================
<?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.firstname">里的name指的是bean实例的属性,这里是user这个实例的属性-->
<field name="user.firstname">
     <field-validator type="requiredstring">
        <message>姓不能为空</message>
     </field-validator>
</field>

<field name="user.lastname">
     <field-validator type="requiredstring">
        <message>名不能为空</message>
     </field-validator>
</field>

<field name="user.age">
     <field-validator type="required">
        <message>年龄不能为空</message>
     </field-validator>
     <field-validator type="int">
        <param name="min">1</param>
        <param name="max">150</param>
        <message>年龄应该在${min}与${max}之间</message>
     </field-validator>
</field>
</validators>