Spring Webflow：字段类型是必需的

我一直在努力处理以下错误一段时间。Spring Webflow：字段类型是必需的

java.lang.IllegalArgumentException: The field type is required

我有一个基本的屏幕流设置与3个屏幕。

屏幕1：身份
屏幕2：接触信息
屏幕3：摘要

从屏幕1 I采取在文本字段这样：

<form:form modelAttribute="booking" action="${flowExecutionUrl}" method="post"> 
    User Name: 
    <form:input type="text" id="username" name="username" path="username"/> 
    <input type="submit" name="_eventId_next" value="next" /> 
    <input type="submit" name="_eventId_cancel" value="Cancel" /> 
</form:form>

它在达到摘要时有效，因为我可以在摘要屏幕上显示$ {booking.username}的内容。

但在屏幕2上，当我尝试完全相同的事情，但与不同的数据字段上面指定的错误。

屏幕2：

<form:form modelAttribute="booking" action="${flowExecutionUrl}" method="post"> 
    Address 1: 
    <form:input type="text" id="address1" name="address1" path="address1"/> 
    <input type="submit" name="_eventId_next" value="Next"/> 
    <input type="submit" name="_eventId_cancel" value="Cancel"/> 
</form:form>

形式标签指明为：

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

大多数代码可以在我先前的问题被看作：

Full Code

相同当我尝试将表单标签添加到选项下拉框字段a时发生错误这样的。

<form:select id="requestType" name="requestType" path="requestType"> 
    <form:option value="0"></option> 
    <form:option value="1">Oprion 1</option> 
    <form:option value="2">Option 2</option> 
</form:select>

相反选项标记的我也试过

<form:input type="text" label="" value="0"/>

都拿出指向这些行作为一个错误相同的错误。

谢谢。

编辑：

堆栈跟踪：例外

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.webflow.execution.FlowExecutionException: Exception thrown in state 'enterContactDetails' of flow 'flow-config' 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:894) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 


root cause 

org.springframework.webflow.execution.FlowExecutionException: Exception thrown in state 'enterContactDetails' of flow 'flow-config' 
    org.springframework.webflow.engine.impl.FlowExecutionImpl.wrap(FlowExecutionImpl.java:571) 
    org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:262) 
    org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169) 
    org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183) 
    org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174) 
    org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 


root cause 

java.lang.IllegalStateException: Exception occurred rendering view org.springframework.web.servlet.view.JstlView: name 'account/BookingContactDetailsScreen'; URL [/WEB-INF/views/account/BookingContactDetailsScreen.jsp] 
    org.springframework.webflow.mvc.view.AbstractMvcView.render(AbstractMvcView.java:191) 
    org.springframework.webflow.engine.ViewState.render(ViewState.java:296) 
    org.springframework.webflow.engine.ViewState.refresh(ViewState.java:243) 
    org.springframework.webflow.engine.ViewState.resume(ViewState.java:221) 
    org.springframework.webflow.engine.Flow.resume(Flow.java:545) 
    org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:258) 
    org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169) 
    org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183) 
    org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174) 
    org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 


root cause 

org.apache.jasper.JasperException: java.lang.IllegalArgumentException: The field type is required 
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238) 
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262) 
    org.springframework.webflow.mvc.servlet.ServletMvcView.doRender(ServletMvcView.java:50) 
    org.springframework.webflow.mvc.view.AbstractMvcView.render(AbstractMvcView.java:187) 
    org.springframework.webflow.engine.ViewState.render(ViewState.java:296) 
    org.springframework.webflow.engine.ViewState.refresh(ViewState.java:243) 
    org.springframework.webflow.engine.ViewState.resume(ViewState.java:221) 
    org.springframework.webflow.engine.Flow.resume(Flow.java:545) 
    org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:258) 
    org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169) 
    org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183) 
    org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174) 
    org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 


root cause 

java.lang.IllegalArgumentException: The field type is required 
    org.springframework.util.Assert.notNull(Assert.java:112) 
    org.springframework.webflow.mvc.view.ConvertingPropertyEditorAdapter.<init>(ConvertingPropertyEditorAdapter.java:48) 
    org.springframework.webflow.mvc.view.BindingModel.findSpringConvertingPropertyEditor(BindingModel.java:277) 
    org.springframework.webflow.mvc.view.BindingModel.getFormattedValue(BindingModel.java:235) 
    org.springframework.webflow.mvc.view.BindingModel.getFieldValue(BindingModel.java:142) 
    org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:120) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:178) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:198) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:164) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:127) 
    org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:421) 
    org.springframework.web.servlet.tags.form.InputTag.writeTagContent(InputTag.java:142) 
    org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:102) 
    org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79) 
    org.apache.jsp.WEB_002dINF.views.account.BookingContactDetailsScreen_jsp._jspx_meth_form_005finput_005f0(BookingContactDetailsScreen_jsp.java:230) 
    org.apache.jsp.WEB_002dINF.views.account.BookingContactDetailsScreen_jsp._jspx_meth_form_005fform_005f0(BookingContactDetailsScreen_jsp.java:127) 
    org.apache.jsp.WEB_002dINF.views.account.BookingContactDetailsScreen_jsp._jspService(BookingContactDetailsScreen_jsp.java:85) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238) 
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262) 
    org.springframework.webflow.mvc.servlet.ServletMvcView.doRender(ServletMvcView.java:50) 
    org.springframework.webflow.mvc.view.AbstractMvcView.render(AbstractMvcView.java:187) 
    org.springframework.webflow.engine.ViewState.render(ViewState.java:296) 
    org.springframework.webflow.engine.ViewState.refresh(ViewState.java:243) 
    org.springframework.webflow.engine.ViewState.resume(ViewState.java:221) 
    org.springframework.webflow.engine.Flow.resume(Flow.java:545) 
    org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:258) 
    org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169) 
    org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183) 
    org.springframework.webflow.mvc.servlet.FlowController.handleRequest(FlowController.java:174) 
    org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

来源

2013-02-04 Sheogora

你可以发布stacktrace。 –

我已经按照你的要求添加了 – Sheogora

我怀疑这是搞砸了，但是你是否意识到你不需要'form = form'中的action =“$ {flowExecutionUrl}”或者'method =“post”' '？另外，'input'字段上的'name'属性也不正常。我想知道这是否会令人困惑。 http://static.springsource.org/spring/docs/3.0.x/spring-framework-reference/htmlsingle/spring-framework-reference.html#spring-form.tld.input – dbreaux

-1

你并不需要提供形式的行动。你应该有你的表单开标签看起来像样本如下：

<form:form method="POST" modelAttribute="booking">

来源

2017-10-21 19:05:24

Spring Webflow：字段类型是必需的

回答

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