struts2自动去除首尾空格

Question

Struts2 中 如何能让它自动去掉接受的字符串参数的首尾空格 

Answer 1

<validators>
<field name="name">
<field-validator type="requiredstring">
<param name="trim">true</param>
<message>${getText("name.requried")}</message>
</field-validator>
<field-validator type="regex">
<param name="expression"><![CDATA[(\w{4,25})]]></param>
<message>${getText("name.regex")}</message>
</field-validator>
</field>
</validators>