第一步,在struts-config文件里添加valudator插件
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames" value="/WEB-INF/validator-rules.xml, /WEB-INF/validation.xml" />
</plug-in>
在action配置里添加属性
validate="true"
第二步,
在validation.xml文件里添加要验证的表单字段的信息
<form-validation>
<formset>
<form name="logonForm">
<field
property="ipcode"
depends="required,minlength">
<arg0 key="LogonForm.ipcode"/>
<arg1 name="minlength" key="${var:minlength}" resource="false"/>
<var>
<var-name>minlength</var-name>
<var-value>4</var-value>
</var>
</field>
<field
property="password"
depends="required,mask">
<arg0 key="LogonForm.password"/>
<var>
<var-name>mask</var-name>
<var-value>^[0-9a-zA-Z]*$</var-value>
</var>
</field>
</form>
</formset>
</form-validation>
在资源文件里添加
validation.test.title=struts validation test
errors.required={0} is required.<p>
errors.minlength={0} can not be less than {1} characters.<p>
errors.maxlength={0} can not be greater than {1} characters.<p>
errors.invalid={0} is invalid.
errors.byte={0} must be an byte.
errors.short={0} must be an short.
errors.integer={0} must be an integer.
errors.long={0} must be an long.
errors.float={0} must be an float.
errors.double={0} must be an double.
errors.date={0} is not a date.
errors.range={0} is not in the range {1} through {2}.
errors.creditcard={0} is not a valid credit card number.
errors.email={0} is an invalid e-mail address.<p>
LogonForm.ipcode=<font color=blue>User name</font>
LogonForm.password=<font color=blue>User password</font>
等等你所想要添加的信息