SPRING JSPページの処理中に例外が発生しました

Springのタグに問題があります。
私はJSPページを実行すると、それは私にこのエラートレースを与える：SPRING JSPページの処理中に例外が発生しました

HTTP Status 500 - An exception occurred processing JSP page /newExamTypology.jsp at line 19 
type Exception report 
message An exception occurred processing JSP page /newExamTypology.jsp at line 19 
description The server encountered an internal error that prevented it from fulfilling this request. 
exception 
org.apache.jasper.JasperException: An exception occurred processing JSP page /newExamTypology.jsp at line 19 
16:  <form:form modelAttribute="examTypology" > 
17:   <div> 
18:    <br /> 
19:    <form:input path="name"></form:input> 
20:    <br /><br /> 
21:    <form:label path="code">Codice:</form:label> <br /> 
22:    <form:input path="code"/> 
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:390) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 
root cause 
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'examTypology' available as request attribute 
    org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:144) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:168) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:188) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:154) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:141) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:132) 
    org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:116) 
    org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:422) 
    org.springframework.web.servlet.tags.form.InputTag.writeTagContent(InputTag.java:142) 
    org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84) 
    org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80) 
    org.apache.jsp.newExamTypology_jsp._jspx_meth_form_005finput_005f0(newExamTypology_jsp.java:193) 
    org.apache.jsp.newExamTypology_jsp._jspx_meth_form_005fform_005f0(newExamTypology_jsp.java:129) 
    org.apache.jsp.newExamTypology_jsp._jspService(newExamTypology_jsp.java:86) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
    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:728) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.47 logs.

私は、なぜ私は、タグの正しいURIを使用Infactはを理解することはできません。
ここに私のコスページがあります！

newExamTypology.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" 
    pageEncoding="UTF-8"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<%@ taglib uri="http://www.springframework.org/tags/form" 
    prefix="springForm"%> 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> 
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> 
<html> 
<head> 
<title>Pagina creazione nuova tipologia d'esame</title> 
</head> 
<body> 
    <h1>Creazione nuova tipologia d'esame</h1> 
    <div>Inserimento dati:</div> 
<%-- <form:form method="POST" commandName="examTypology" action="updateexamtypology"> --%> 
    <form:form modelAttribute="examTypology" > 
     <div> 
      <br /> 
      <form:input path="name"></form:input> 
      <br /><br /> 
      <form:label path="code">Codice:</form:label> <br /> 
      <form:input path="code"/> 
      <br /><br /> 
      <form:label path="description">Descrizione: </form:label><br /> 
      <form:input path="description"/> 
      <br /><br /> 
      <form:label path="cost">Costo: </form:label><br /> 
      <form:input path="cost"/> 
      <input type="submit" value="invia" /> 
     </div> 
    </form:form> 

    <div>Naviga nel sito:</div> 
    <div> 
<!--  <a href="newExamTypology.jsp">crea nuova tipologia d'esame</a> --> 
     <p>Ciao!</p> 
    </div> 
</body> 
</html>

ExamTypologyController.Java

package it.uniroma3.controller; 

import java.util.List; 

import javax.validation.Valid; 

import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.beans.factory.annotation.Qualifier; 
import org.springframework.stereotype.Controller; 
import org.springframework.ui.Model; 
import org.springframework.validation.BindingResult; 
import org.springframework.validation.Validator; 
import org.springframework.validation.annotation.Validated; 
import org.springframework.web.bind.WebDataBinder; 
import org.springframework.web.bind.annotation.InitBinder; 
import org.springframework.web.bind.annotation.ModelAttribute; 
import org.springframework.web.bind.annotation.PathVariable; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RequestMethod; 
import org.springframework.web.servlet.ModelAndView; 
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; 
import it.uniroma3.model.ExamTypology; 
import it.uniroma3.service.ExamTypologyService; 

@Controller 
@RequestMapping("/examTypology") 
public class ExamTypologyController extends WebMvcConfigurerAdapter{ 

    @Autowired 
    private ExamTypologyService examTypologyService; 

    @Autowired 
    @Qualifier("examTypologyValidator") 
    private Validator validator; 

    @InitBinder 
    private void initBinder(WebDataBinder binder) { 
     binder.setValidator(validator); 
    } 

    @RequestMapping(value = "/examTypology", method = RequestMethod.POST) 
    public ModelAndView examTypology() { 
     return new ModelAndView("examTypology", "command", new ExamTypology()); 
    } 

// @ModelAttribute("examTypology") 
// public ExamTypology createExamTypologyModel() { 
//  return new ExamTypology(); 
// } 

    @RequestMapping(value="/listexamtypology", method = RequestMethod.GET) 
    public String listExamTypology(Model model) { 
     model.addAttribute("examTypologiesList", examTypologyService.listExamTypology()); 
     return "examTypology"; 
    } 

    @RequestMapping(value = "/addexamtypology", method = RequestMethod.POST) 
    public String addExamTypology(Model model) { 
     return "newexamtypology"; 
    } 

    @RequestMapping(value="/updateexamtypology", method = RequestMethod.GET) 
    public String updateExamTypology(@ModelAttribute("examTypology") @Valid ExamTypology examTypology, BindingResult bindingResult, Model model) { 
     if(bindingResult.hasErrors()) 
      return "addexamtypology"; 
     this.examTypologyService.insertExamTypology(examTypology); 
     model.addAttribute("examTypologiesList", examTypologyService.listExamTypology()); 
     return "examTypology"; 
    } 

    @RequestMapping(value="/delete/{etId}", method = RequestMethod.GET) 
    public String deleteExamTypology(@PathVariable("etid") Long etId, Model model) { 
     this.examTypologyService.deleteExamTypology(etId); 
     model.addAttribute("examTypologiesList", examTypologyService.listExamTypology()); 
     return "examTypology"; 
    } 


}

おかげで前に！

出典

2016-06-13 ProtoTyPus

モデル自体をページに渡していないようです。基本的には、以下のようなことをする必要があります。

@RequestMapping(value = "/newExamTypology", method = RequestMethod.GET) 
public String showNewExamTypology(ModelMap modelMap) { 
    // your custom logic 
    modelMap.put("examTypology", new ExamTypology()); 
    return "newExamTypology"; 
}

出典

2016-06-13 11:57:01

もっと詳しく説明できますか？ ^^ " – ProtoTyPus

'/newExamTypology'ページの 'GET'リクエストをしているときに、あなたのページはオブジェクト' examTypology'が 'form'に存在するのを待っています。あなたのコードではこれを見つけられませんでした。問題である。 –

SPRING JSPページの処理中に例外が発生しました

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