jsp - java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'command' available as request attribute in spring mvc -


please i've been searching error whole day, cannot find precise answer.i want controller take me loginmodel.jsp.

this controller.

@requestmapping(value="/loginmodel",method=requestmethod.get) public string requestlogin(){     return "loginmodel"; }

this jsp loginmodel.jsp 

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %><!doctype html public "-//w3c//dtd html 4.01 transitional//en" "http://www.w3.org/tr/html4/loose.dtd"><html><head><meta http-equiv="content-type" content="text/html; charset=iso-8859-1"></head> <body> <form:form method = "post" action = "/helpdesk/login">     <table>         <tr>            <td><form:label path = "username">username</form:label></td>            <td><form:input path = "username" /></td>         </tr>         <tr>            <td><form:label path = "password">password</form:label></td>            <td><form:input path = "password" /></td>         </tr>         <tr>            <td><form:label path = "role">role</form:label></td>            <td><form:input path = "role" /></td>         </tr>         <tr>            <td colspan = "2">               <input type = "submit" value = "submit"/>            </td>         </tr>      </table>     </form:form>

this error getting

org.apache.jasper.jasperexception: exception occurred processing jsp page /web-inf/jsp/loginmodel.jsp @ line 12  9:  <form:form method = "post" action = "/helpdesk/login"> 10:         <table> 11:             <tr> 12:                <td><form:label path = "username">username</form:label></td> 13:                <td><form:input path = "username" /></td> 14:             </tr> 15:             <tr>   stacktrace:     org.apache.jasper.servlet.jspservletwrapper.handlejspexception(jspservletwrapper.java:568)     org.apache.jasper.servlet.jspservletwrapper.service(jspservletwrapper.java:465)     org.apache.jasper.servlet.jspservlet.servicejspfile(jspservlet.java:395)     org.apache.jasper.servlet.jspservlet.service(jspservlet.java:339)     javax.servlet.http.httpservlet.service(httpservlet.java:727)     org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:52)     org.springframework.web.servlet.view.internalresourceview.rendermergedoutputmodel(internalresourceview.java:238)     org.springframework.web.servlet.view.abstractview.render(abstractview.java:250)     org.springframework.web.servlet.dispatcherservlet.render(dispatcherservlet.java:1060)     org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:798)     org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:716)     org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:647)     org.springframework.web.servlet.frameworkservlet.doget(frameworkservlet.java:552)     javax.servlet.http.httpservlet.service(httpservlet.java:620)     javax.servlet.http.httpservlet.service(httpservlet.java:727)     org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:52) root cause  java.lang.illegalstateexception: neither bindingresult nor plain target object bean name 'command' available request attribute     org.springframework.web.servlet.support.bindstatus.<init>(bindstatus.java:141)     org.springframework.web.servlet.tags.form.abstractdataboundformelementtag.getbindstatus(abstractdataboundformelementtag.java:174)     org.springframework.web.servlet.tags.form.abstractdataboundformelementtag.getpropertypath(abstractdataboundformelementtag.java:194)     org.springframework.web.servlet.tags.form.labeltag.autogeneratefor(labeltag.java:129)     org.springframework.web.servlet.tags.form.labeltag.resolvefor(labeltag.java:119)     org.springframework.web.servlet.tags.form.labeltag.writetagcontent(labeltag.java:89)     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.jsp.loginmodel_jsp._jspx_meth_form_005flabel_005f0(loginmodel_jsp.java:193)     org.apache.jsp.web_002dinf.jsp.loginmodel_jsp._jspx_meth_form_005fform_005f0(loginmodel_jsp.java:127)     org.apache.jsp.web_002dinf.jsp.loginmodel_jsp._jspservice(loginmodel_jsp.java:81)     org.apache.jasper.runtime.httpjspbase.service(httpjspbase.java:70)     javax.servlet.http.httpservlet.service(httpservlet.java:727)     org.apache.jasper.servlet.jspservletwrapper.service(jspservletwrapper.java:432)     org.apache.jasper.servlet.jspservlet.servicejspfile(jspservlet.java:395)     org.apache.jasper.servlet.jspservlet.service(jspservlet.java:339)     javax.servlet.http.httpservlet.service(httpservlet.java:727)     org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:52)     org.springframework.web.servlet.view.internalresourceview.rendermergedoutputmodel(internalresourceview.java:238)     org.springframework.web.servlet.view.abstractview.render(abstractview.java:250)     org.springframework.web.servlet.dispatcherservlet.render(dispatcherservlet.java:1060)     org.springframework.web.servlet.dispatcherservlet.dodispatch(dispatcherservlet.java:798)     org.springframework.web.servlet.dispatcherservlet.doservice(dispatcherservlet.java:716)     org.springframework.web.servlet.frameworkservlet.processrequest(frameworkservlet.java:647)     org.springframework.web.servlet.frameworkservlet.doget(frameworkservlet.java:552)     javax.servlet.http.httpservlet.service(httpservlet.java:620)     javax.servlet.http.httpservlet.service(httpservlet.java:727)     org.apache.tomcat.websocket.server.wsfilter.dofilter(wsfilter.java:52)


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