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我正在使用spring mvc 4.3.8和spring webflow 2.4.5以及thymeleaf 3.x.驗證失敗後，我無法從Spring Webflow顯示的jsr-303註釋中獲取錯誤消息。視圖本身重新呈現時，不會顯示錯誤消息。我還需要做什麼？請幫忙。Spring Webflow：無法顯示帶有jsr 303驗證的錯誤消息
<!-- WebFlow Configuration -->
<bean id="viewFactoryCreator"
class="org.springframework.webflow.mvc.builder.MvcViewFactoryCreator">
<property name="viewResolvers" ref="viewResolver" />
</bean>
<webflow:flow-builder-services id="flowBuilderServices"
view-factory-creator="viewFactoryCreator" validator="validator"/>
<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />
<webflow:flow-registry id="flowRegistry"
flow-builder-services="flowBuilderServices" base-path="/WEB-INF/spring/flows">
<webflow:flow-location id="add-locale" path="/locale-flow.xml" />
</webflow:flow-registry>
<!-- the flow executor drives the execution of the flow -->
<webflow:flow-executor id="flowExecutor" flow-registry="flowRegistry"/>
<!-- Enables FlowHandler URL mapping.
This handler adapter is the bridge between DispatcherServlet and the flow executor -->
<bean class="org.springframework.webflow.mvc.servlet.FlowHandlerAdapter">
<property name="flowExecutor" ref="flowExecutor" />
</bean>
<!-- Maps request paths to flows in the flowRegistry.
Tells DispatcherServlet to send flow requests to the FlowHandlerAdapter -->
<bean class="org.springframework.webflow.mvc.servlet.FlowHandlerMapping">
<property name="flowRegistry" ref="flowRegistry" />
<property name="order" value="0" />
</bean>
區域設置flow.xml
<input name="id"/>
<on-start>
<evaluate expression="localeController.newLocaleForm(id)" result="flowScope.localeForm" />
</on-start>
<view-state id="localeForm" view="locale/locale-form-p1" model="flowScope.localeForm">
<transition on="next" to="configureMessageBundle"/>
</view-state>
<view-state id="configureMessageBundle" view="locale/locale-form-p2" model="flowScope.localeForm" />
<view-state id="returnToViewPage" view="externalRedirect:locale-page.html" />
背襯形式豆，LocaleForm.java
@NotNull(message = "Locale cannot be blank")
private String code;
@NotBlank(message = "Name cannot be blank")
@Size(min = 3, max = 255, message = "Name must be between 3 and 255 characters")
@Pattern(regexp = "^[\\w-_]+$", message = "Name can contain only alphabets, numbers, hypen and underscore")
private String name;
表單視圖頁面，語言環境的形狀p1.html
<form class="form-horizontal" th:action="${flowExecutionUrl}" th:object="${localeForm}" method="post" enctype="multipart/form-data">
<div class="form-group">
<label class="control-label col-xs-2">Locale</label>
<div class="col-xs-10">
<select class="selectpicker form-control" tabindex="0" th:field="*{code}">
<option value="en_US" th:each="locale : *{availableLocales}"
th:value="${locale.key}"
th:text="${locale.value}">English (US)</option>
</select>
</div>
</div>
<div class="form-group required">
<label class="control-label col-xs-2">
Name <a role="button" data-toggle="popover" data-trigger="hover" data-html="true" title="" data-content="Provide a unique name for the Locale." data-placement="top"><span class="fa fa-info-circle"></span></a>
</label>
<div class="col-xs-10" th:classappend="${#fields.hasErrors('name')}? has-error">
<input class="form-control" type="text" placeholder="Name" th:field="*{name}" >
<span class="help-block" th:unless="${#fields.hasErrors('name')}">Allowed characters are alphabets, numbers, hyphen and underscore.</span>
<span class="help-block" th:errors="*{name}"></span>
</div>
</div>
<div class="form-group">
<div class="col-xs-2 col-xs-offset-2">
<button class="btn btn-primary btn-sm btn-primary-spacing" type="submit" name="_eventId_next">Next</button>
<button class="btn btn-default btn-sm" type="button" up-href="locale-page.html" up-target="#page-content">Cancel</button>
</div>
</div>
</form>