struts2 alidate验证

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validate验证 第一步 \src\com\test\bean\User-user-validation.xml 必须写在相应的javaBean下
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<?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="firstname">
  <field-validator type="requiredstring">
   <message>required first name</message>
  </field-validator>
 </field>

 <field name="lastname">
  <field-validator type="requiredstring">
   <message>required last name</message>
  </field-validator>
 </field>

 <field name="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>
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validate验证 第二步 src\com\test\action\user\SaveUserAction-validation.xml 写在相应的action下
                    src\com\test\action\user\UpdateUserAction-validation.xml   写在相应的action下
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SaveUserAction-validation.xml，UpdateUserAction-validation.xml
<message>user's </message> 加一个前缀 比如：返回错误信息：错误 那么加了这个前缀结果：user's 错误
<?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">
  <field-validator type="visitor">
   <param name="context">user</param>
   <param name="appendPrefix">true</param>
   <message>user's </message>
  </field-validator>
 </field>
</validators>