验证框架

<?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">
  <field-validator type="requiredstring">
   <message>required first name</message>
  </field-validator>
 </field>
 
 <field name="user.lastname">
  <field-validator type="requiredstring">
   <message>required last name</message>
  </field-validator>
 </field>
 
 <field name="user.age">
  <field-validator type="required">
   <message>required age</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>
 
</validators>
 -->
 
 
<validators>
 <field name="user">
  <field-validator type="visitor">
   <param name="context">user</param>
   <param name="appendPrefix">true</param>
   <message>user's </message>
  </field-validator>
 </field>
</validators>