struts validator framework How to guide

1)
struts-doc-config.xml:
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames" value="/WEB-INF/validator-rules.xml,/WEB-INF/validation_doc.xml" />
</plug-in>

2)
Make sure your form extends ValidatorActionForm or ValidatorForm.




3)验证类和验证方法(不是必须的，但要验证到方法一级的颗粒度验证方法必须自己写)
详见：com.huawei.it.mi.validator.MIFieldChecks
public static boolean validateRequired(
Object bean,
ValidatorAction va,
Field field,
ActionErrors errors,
HttpServletRequest request) {...}


4）
WEB-INF/validaotr-rules.xml
<validator name="mi.required" classname="com.huawei.it.mi.validator.MIFieldChecks" method="validateRequired" methodParams="java.lang.Object,
                               org.apache.commons.validator.ValidatorAction,
                               org.apache.commons.validator.Field,
                               org.apache.struts.action.ActionErrors,
                               javax.servlet.http.HttpServletRequest" msg="errors.required">
</validator>


5)
确保资源文件里有：errors.required={0} is required.

6)
validation.xml里加入你要验证的action别名(注意这里是action的名字)
<form name="/frontDoc">
<field property="name" depends="mi.required">
<arg0 key="一线市场－标题" resource="false" />
<var>
<var-name>methodsNeedValidation</var-name>
<var-value>saveToDraft</var-value>
</var>
</field>
</form>
注：如果有多个方法你可以使用逗号分割符。如：<var-value>saveToDraft,publish</var-value>

7)
确保你的struts配置文件里相应的action里的各参数配置正确：

1、validate="true"；
2、input="mi.document.frontDocError"你的显示错误的页面
3、error页面上有<html:errors/>
<action path="/frontDoc" type="com.huawei.it.mi.document.action.FrontDocAction" name="fronDocForm" scope="request" validate="true" input="mi.document.frontDocError" parameter="method">
<forward name="frontDocCreate" path="mi.document.frontDocCreate" />
<forward name="frontDocList" path="mi.document.frontDocList">
</forward>
<forward name="success" path="mi.document.frontDocSuccess">
</forward>
<forward name="error" path="mi.document.frontDocError">
</forward>
</action>

8) U can go!