java - f :validateRequired does not work on Tomcat

Question

我在我的第一个 JSF 项目(仍在学习 JSF)中使用 GlassFish，一切都很好。但后来，我切换到 Tomcat(GlassFish 导致了一些问题，而 Tomcat 托管的提供更便宜)。现在我有一个我无法解决的问题:使用 f:validate 的表单验证停止工作。

我已经尝试过很多解决方案，提到最多的解决方案是将 validation-api.jar 和 hibernate-validator.jar 添加到 libs - 这只是导致表单完全停止工作(见上面的错误)。

现在我真的不知道该怎么办了。我正在使用 NetBeans 7.1、Tomcat 7.0.22.0。任何帮助表示赞赏。谢谢!

哦，是的......有趣的是，通过正则表达式(电子邮件)进行验证有效，但前提是输入不为空)。 (并且没有添加库)

将 validation-api.jar 和 hibernate-validator.jar 添加到 libs 并提交表单后的错误消息:

javax.validation.ValidationException: Unable to find a default provider
    at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:264)
    at javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:111)
    at javax.faces.validator.BeanValidator.validate(BeanValidator.java:276)
    at javax.faces.component.UIInput.validateValue(UIInput.java:1149)
    at javax.faces.component.UIInput.validate(UIInput.java:967)
    at javax.faces.component.UIInput.executeValidate(UIInput.java:1233)
    at javax.faces.component.UIInput.processValidators(UIInput.java:698)
    at javax.faces.component.UIForm.processValidators(UIForm.java:253)
    at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214)
    at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214)
    at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1172)
    at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:409)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

形式:

<h:form>
    <table>
        <tr>
            <th><label for="registration-email">#{usersTexts.email}:</label></th>
            <td>
                <h:inputText value="#{userRegistry.newUser.email}" id="registration-email" validatorMessage="#{msg.invalidEmail}" maxlength="100">
                    <f:validateRequired />
                    <f:validateRegex pattern="^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$" />
                </h:inputText>
            </td>
            <td><p:message for="registration-email" /></td>
            <td rowspan="4">
                <!--p:captcha immediate="true" validatorMessage="#{msg.wrongCaptcha}" requiredMessage="#{formsTexts.captcha} #{msg.isEmpty}" /-->
            </td>
        </tr>
        <tr>
            <th><label for="registration-name">#{usersTexts.name}:</label></th>
            <td>
                <h:inputText value="#{userRegistry.newUser.name}" id="registration-name" validatorMessage="#{formsTexts.field} #{usersTexts.name} #{msg.isEmpty}" maxlength="100">
                    <f:validateRequired />
                </h:inputText>
            </td>
            <td><p:message for="registration-name" /></td>
        </tr>
        <tr>
            <th><label for="registration-password1">#{usersTexts.password}:</label></th>
            <td>
                <h:inputSecret value="#{userRegistry.newUser.password}" binding="#{password}" id="registration-password1" validatorMessage="#{formsTexts.field} #{usersTexts.password} #{msg.isEmpty}">
                    <f:validateRequired />
                </h:inputSecret>
            </td>
            <td><p:message for="registration-password1" /></td>
        </tr>
        <tr>
            <th><label for="registration-password2">#{usersTexts.passwordAgain}:</label></th>
            <td>
                <h:inputSecret id="registration-password2" validatorMessage="#{msg.passwordsNotEqual}">
                    <f:validateLength minimum="#{user.MIN_PASSWORD_LENGTH}" />
                    <f:validator validatorId="equality" />
                    <f:attribute name="matchAgainst" value="#{password}" />
                </h:inputSecret>
            </td>
            <td><p:message for="registration-password2" /></td>
        </tr>
        <tr>
            <td colspan="2" class="submit_row">
                <h:commandButton value="#{usersTexts.register}" action="#{userRegistry.register}" />
            </td>
        </tr>
    </table>
</h:form>

Answer 1

嗯，在 friend 的帮助下我解决了它...不知道为什么，但是如果输入为空，所有的 f:validate 标签都会被忽略——包括 f:validateRequired，所以有根本没有验证。

通过删除 f:validateRequired 标签并使用 required="true" 属性解决了这个问题。因此，输入值不能为空(required="true" 有效)并且所有其他 f:validators 都有效。