Question

求教，struts2中使用xml配置validator，文本字段只配置stringlength，不配置requirestring，貌似不起作用

是不是一定要配置requirestring？

Answer 1

<!DOCTYPE validators PUBLIC
"-//Apache Struts//XWork Validator 1.0.2//EN"
"http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">

<validators>
<field name="name"><!-- 要对哪个属性进行验证 -->
<field-validator type="requiredstring"><!-- 验证规则 -->
<message>姓名不能为空!</message><!-- 违反规则的提示 -->
</field-validator>
</field>
<field name="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">200</param>
<message >年龄必须在${min}和${max}之间</message>
</field-validator>
</field>

</validators>