Java 验证器和Struts无法查看错误

我正在研究Struts框架，并尝试一个使用DynaValidator表单的示例。在我的测试中，我尝试在codProdotto字段上添加一个必需的chek。但如果我将文本框留空，则不会显示错误消息

表格：

属性文件

# -- validator --
errors.invalid={0} is invalid.
errors.maxlength={0} can not be greater than {1} characters.
errors.minlength={0} can not be less than {1} characters.
errors.range={0} is not in the range {1} through {2}.
errors.required={0} is required.
errors.byte={0} must be an byte.
errors.date={0} is not a date.
errors.double={0} must be an double.
errors.float={0} must be an float.
errors.integer={0} must be an integer.
errors.long={0} must be an long.
errors.short={0} must be an short.
errors.creditcard={0} is not a valid credit card number.
errors.email={0} is an invalid e-mail address.

---

你是否检查了属性文件是否包含关键错误的值。required如下：errors.required=Enter blahTry this nothing…我试图按照你所说的进行更改，但没什么，没有看到消息我正在研究Struts框架-如果你不是为了支持旧版应用而学习Struts，我强烈建议您考虑另一个框架。Struts 1在几年前就已经寿终正寝，支持文档正在消失。用一个死框架开始一个新项目是个坏主意。

    <form-bean name="new_product" type="org.apache.struts.validator.DynaValidatorForm" >
        <form-property name="codProdotto" type="java.lang.String" />
        <form-property name="descrizione" type="java.lang.String" />
        <form-property name="categoria" type="java.lang.String" />
        <form-property name="numListino" type="java.lang.String" />
        <form-property name="prezzo" type="java.lang.Double" />
        <form-property name="noteAggiuntive" type="java.lang.String" />
    </form-bean>
</form-beans>

<action-mappings>
<action
        attribute="new_product"
        path="/form_remove_prodotto"
        type="controller.ProductManager"
        parameter="removeProduct"
        name="new_product"
        scope="request"
        validate="false"
        input="input.jsp">
        <forward name="ret_index" path="/index.jsp" />
    </action>
 </action-mappings>

<message-resources parameter="MessageResources" />

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property
    property="pathnames"
    value="/org/apache/struts/validator/validator-rules.xml,
           /WEB-INF/validation.xml"/>
</plug-in>

<formset>

    <!-- An example form -->
    <form name="new_product">
        <field 
            property="codProdotto" depends="required">
            <arg key="errors.required" />

        </field>

    </form>

</formset>




</form-validation>

public class ProductManager extends MappingDispatchAction {

public ActionForward addProduct(ActionMapping arg0, ActionForm arg1,
        HttpServletRequest arg2, HttpServletResponse arg3) throws Exception {

    DynaValidatorForm  actionForm = (DynaValidatorForm ) arg1;

    System.out.println("Add");
    return arg0.findForward("ret_index");
}

public ActionForward removeProduct(ActionMapping arg0, ActionForm arg1,
        HttpServletRequest arg2, HttpServletResponse arg3) throws Exception {
    // TODO Auto-generated method stub
    DynaValidatorForm  actionForm = (DynaValidatorForm ) arg1;
    System.out.println("Remove " + actionForm.get("codProdotto"));
    return arg0.findForward("ret_index");
}

}

# -- validator --
errors.invalid={0} is invalid.
errors.maxlength={0} can not be greater than {1} characters.
errors.minlength={0} can not be less than {1} characters.
errors.range={0} is not in the range {1} through {2}.
errors.required={0} is required.
errors.byte={0} must be an byte.
errors.date={0} is not a date.
errors.double={0} must be an double.
errors.float={0} must be an float.
errors.integer={0} must be an integer.
errors.long={0} must be an long.
errors.short={0} must be an short.
errors.creditcard={0} is not a valid credit card number.
errors.email={0} is an invalid e-mail address.