struts2学习校验器

struts2校验器命名规则为<action-name>-validation.xml,并且和action存放在同一个目录下如:action/LoginAction则校验器也为LoginAction-validation.xml

在使用struts2的校验器时应使用struts2的表单标签并在<s:form>标签中加入validate="true"这个属性

<?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="num1">

<field-validator type="int" short-circuit="true">
   <param name="min">0</param>
   <param name="max">200</param>
   <message>num1不能大于200</message>
  </field-validator>
</field>
  <field name="num2">
  <field-validator type="int" short-circuit="true">
   <param name="min">0</param>
   <param name="max">200</param>
   <message>num2不能大于200</message>
  </field-validator>
  <field-validator type="fieldexpression" short-circuit="true">
   <param name="expression"><![CDATA[(num1==num2)]]></param>
   <message>两个数字必须相同</message>

</field-validator>
</field>
</validators>