Struts2验证仅不适用于正则表达式 [英] Struts2 validation doesn't work only with regex
问题描述
验证与所需的字符串(和电子邮件，我已经测试了这些)一起很好地工作了.但是当我尝试使用正则表达式时，验证无效.
The validation works fine with the required string (and email, I tested just these). But when I try to use regex, the validation has no effect.
<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.3//EN"
"http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">
<validators>
<field name="cognome">
<field-validator type="requiredstring">
<param name="trim">true</param>
<message>Cognome è un campo obbligatorio</message>
</field-validator>
</field>
<field name="telefono">
<field-validator type="requiredstring">
<message key="errors.required" />
</field-validator>
<field-validator type="regex">
<param name="expression">[0-9]{9,15}</param>
<message>Il numero di telefono deve essere minimo di 9 cifre
</message>
</field-validator>
</field>
</validators>
telefono 必须包含9到15个数字.当字段丢失时，这会产生错误；如果插入 telefono 之类的"123"，则不会出现错误.
telefono must have between 9 and 15 numeric digits. This give error when the fields are missing, and no error if I insert a telefono like "123".
jsp:
<%@ page language="java" contentType="text/html;"
import="java.util.*,it.almaviva.bean.*,it.almaviva.delegate.*;"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<link href="${pageContext.request.contextPath}/css/stile1.css" rel="stylesheet" type="text/css" />
<title>Registrazione account</title>
</head>
<body>
<jsp:include page="header.jsp"/>
<s:actionerror />
<s:form name="formDatiUtente" action="inviaRichiesta.action" method="post" theme="simple" validate="true">
<center>
<s:fielderror></s:fielderror>
<table width="48%" class="LISTA" border="0" cellPadding="3" cellSpacing="5" align="center">
<tr>
<td width="35%">
<p class="testodx">
<s:text name="label.cognome" />
</p>
</td>
<td>
<p class="testosx">
<s:textfield name="cognome" id="idCognome"
size="30" value="%{anagraficaVDR.cognome}" />
</p>
</td>
</tr>
<tr>
<td>
<p class="testodx"><s:text name="label.telefono_Ufficio_reparto" /></p>
</td>
<td>
<s:textfield name="telefono" id="idTelefono_Ufficio_reparto" size="30" value="%{anagraficaVDR.telefono}"/>
</td>
</tr>
</table>
<br>
<s:if test="!gestioneAmministratore">
<s:submit method="execute" cssClass="bottone" key="label.invia" align="center" />
</s:if>
</center>
</s:form>
</body>
</html>
另一个次要问题是，如果我删除此内容:
another secondary problem is that if I remove this:
<s:fielderror></s:fielderror>
不显示错误消息.这很奇怪，因为例如此处，此字符串丢失并且错误消息正确显示(每个字段下我都喜欢).
the error messages are not displayed. That it's strange, because for example here this string is missing and the error messages are showed correctly (each under every field, thing that I prefer).
另一个次要问题是，如果我不插入字段而是按提交，则会收到(正确)错误，但是字段中的所有值都将被删除，而我宁愿保留所有值(如上一个) 我已链接)的示例.
Another secondary problem is that if I doesn't insert a field and I press submit, I get (correctly) an error, but all the values in the fields are erased, instead I prefer to keep all (like in the previous example that I linked).
推荐答案
参数应为regexExpression，而不是expression.
http://struts.apache.org/development/2.x/docs/regex-validator.html
要显示特定字段的错误，请使用fieldName属性，例如
To display a specific field's error, use the fieldName attribute, e.g.,
<s:fielderror fieldName="cogname" />
请注意，<s:form>的validate属性与客户端验证有关.它与服务器端的验证无关.
Note that <s:form>'s validate attribute regards client-side validation; it has nothing to do with validation on the server side.
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