无论BindingResult也不是为bean名称“modelObject”可以作为请求属性平原目标对象

这是我的控制器无论BindingResult也不是为bean名称“modelObject”可以作为请求属性平原目标对象

，这是JSP页面

<form:form commandName="modelObject" action="registration.do" method="post" > 
    <table> 
     <tr> 
     <td><form:label path="userName">User Name</form:label></td> 
     <td><form:input path="userName"></form:input></td> 
     </tr> 
     <tr> 
     <td><form:label path="password">Password</form:label></td> 
     <td><form:input path="password"></form:input></td> 
     </tr> 
     <tr> 
     <td><form:label path="sex">Sex</form:label></td> 
     <td><form:radiobutton path="sex" value="M" label="M"></form:radiobutton> 
     <form:radiobutton path="sex" value="F" label="F"></form:radiobutton></td> 
     </tr> 
     <tr> 
     <td><form:label path="dob">Date of Birth</form:label></td> 
     <td><form:input path="dob"></form:input></td> 
     </tr>  
     <tr> 
     <td><form:label path="nation">Nationality</form:label></td> 
     <td><form:select path="nation"> 
     <form:option value="0" label="Please Select"></form:option> 
     <form:options items="${countryList}" itemValue="id" itemLabel="name" /> 
     </form:select></td> 
     </tr> 
     <tr> 
     <td align="right"><input type="submit" value="Submit Form"></input></td> 
     <td align="center"><input type="reset" value="Clear Form"></input></td> 
     </tr> 
    </table>  
</form:form>

有了他们我正在以下错误

Feb 11, 2013 5:08:51 PM org.apache.catalina.core.StandardWrapperValve invoke 
SEVERE: Servlet.service() for servlet [mode] in context with path [/SpringHb] threw exception [An exception occurred processing JSP page /WEB-INF/jsp/register.jsp at line 16 

13: <form:form commandName="modelObject" action="registration.do" method="post" > 
14:  <table> 
15:   <tr> 
16:   <td><form:label path="userName">User Name</form:label></td> 
17:   <td><form:input path="userName"></form:input></td> 
18:   </tr> 
19:   <tr> 


Stacktrace:] with root cause 
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'modelObject' available as request attribute 
    at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141) 
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:174) 
    at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:194) 
    at org.springframework.web.servlet.tags.form.LabelTag.autogenerateFor(LabelTag.java:129) 
    at org.springframework.web.servlet.tags.form.LabelTag.resolveFor(LabelTag.java:119) 
    at org.springframework.web.servlet.tags.form.LabelTag.writeTagContent(LabelTag.java:89) 
    at org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:102) 
    at org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:79) 
    at org.apache.jsp.WEB_002dINF.jsp.register_jsp._jspx_meth_form_005flabel_005f0(register_jsp.java:282) 
    at org.apache.jsp.WEB_002dINF.jsp.register_jsp._jspService(register_jsp.java:114) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:684) 
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471) 
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:402) 
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:329) 
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238) 
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250) 
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1063) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:801) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) 
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    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:98) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) 
    at java.lang.Thread.run(Thread.java:722)

我不明白是什么问题

使用弹簧形式的标签则显示上面的错误，但如果我用写相同的代码HTML时，它做工精细上面写的代码下面是用JSP编写的HTML代码

<c:url value="/registration.do" var="reg" /> 
<form:form action="${reg}" > 
User Name <input type="text" name="userName"/><br> 
Password<input type="password" name="password"/><br> 
Sex<input type="radio" name="sex" value="M"/>M<input type="radio" name="sex" value="F"/>F<br> 
DOB<input type="text" name="dob"/><br> 
Nationality<select name="nation"> 
    <option value="India">India</option> 
    <option value="USA">USA</option> 
</select><br> 
<input type="submit" name="submit" value="Submit" /> 
<input type="reset" name="reset" value="Reset" /> 
</form:form>  

<c:url value="/login.do" var="log" /> 
<form:form action="${log}" > 
<input type="submit" name="Go Back" value="Go Back" /> 
</form:form>

请帮助.. ..

来源

2013-02-11 pradeep

您需要绑定控制器方法中的空Login对象，您要返回指定的jsp页面。

model.addAttribute("modelObject", yourEmptyModelObject);

还有一件事路径时，才需要对那些只从你想从user.So输入无需为<form:label>和其他非渲染领域的指定路径领域。

来源

2013-02-11 12:30:40

@Piyush我应该从方法返回什么，一个字符串如上或模型映射。 – pradeep 2013-02-11 12:52:13

@pradeep字符串也可以工作，否则返回ModelAndView.But不要忘记在模型或mav中添加属性。 – 2013-02-11 13:22:28

@Piyush我在方法“model.addAttribute（”modelObject“，entity）;”并在方法参数中编写了“模型模型”，但它仍然显示相同的错误。怎么办 – pradeep 2013-02-11 13:28:30

无论BindingResult也不是为bean名称“modelObject”可以作为请求属性平原目标对象

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