spring BindingResult 和 bean 名称的普通目标对象都不能用作请求属性
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Neither BindingResult nor plain target object for bean name available as request attr
提问by Dan Hargis
Hi Experts, I have this controller code which is throwing the above mentioned error. It was working fine till yesterday, I have no clue what colleague did to this code and today I am seeing the error:
嗨专家，我有这个控制器代码，它引发了上述错误。直到昨天它都运行良好，我不知道同事对这段代码做了什么，今天我看到了错误：
Neither BindingResult nor plain target object for bean name 'sideForm' available as request attribute
bean 名称“sideForm”的 BindingResult 和普通目标对象都不能用作请求属性
Can you please suggest me where to look for this kind of error. Am I making any mistake in POST or GET method declaration or returning something wrong?
你能建议我在哪里寻找这种错误吗？我是否在 POST 或 GET 方法声明中犯了任何错误或返回错误？
Your help is greatly appreciated :)
非常感谢您的帮助:)
package com.att.analytics.ui;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.si.myworld.business.AdminChart;
import com.si.myworld.business.Chart;
import com.si.myworld.dao.AdminChartSummaryData;
import com.si.myworld.dao.BulletinData;
import com.si.myworld.dao.ChartData;
@RequestMapping("/index.html")
@Controller
public class IndexController {
private static final Logger log = Logger.getLogger(IndexController.class);
/**
* Called to load the page initially (GET request)
*
* @param model
* @return
*/
@RequestMapping(method = RequestMethod.GET)
public String getCharts(ModelMap model) {
Chart chart = new Chart();
chart.setTimeline("Monthly");
chart.setStartDt("mm/dd/yyyy");
chart.setEndDt("mm/dd/yyyy");
AdminChartSummaryData acsd = new AdminChartSummaryData();
List<AdminChart> list = acsd.getLandingChartDataList();
if (list.size() == 4) {
Chart chart1 = new Chart(list.get(0));
Chart chart2 = new Chart(list.get(1));
Chart chart3 = new Chart(list.get(2));
Chart chart4 = new Chart(list.get(3));
model.put("chart1", chart1);
model.put("chart2", chart2);
model.put("chart3", chart3);
model.put("chart4", chart4);
log.info("chart 1>>>>" + chart1);
ChartData cd = new ChartData();
String chartOneDatasource = cd.fetchChartDatasourceName(chart1
.getChartSubgroup());
String chartTwoDatasource = cd.fetchChartDatasourceName(chart2
.getChartSubgroup());
String chartThreeDatasource = cd.fetchChartDatasourceName(chart3
.getChartSubgroup());
String chartFourDatasource = cd.fetchChartDatasourceName(chart4
.getChartSubgroup());
String breadcrumbOne = chart1.getChartGroup() + ">>"
+ chart1.getChartSubgroup();
String breadcrumbTwo = chart2.getChartGroup() + ">>"
+ chart2.getChartSubgroup();
String breadcrumbThree = chart3.getChartGroup() + ">>"
+ chart3.getChartSubgroup();
String breadcrumbFour = chart4.getChartGroup() + ">>"
+ chart4.getChartSubgroup();
BulletinData bd = new BulletinData();
String bulletin = bd.getBulletinData();
model.put("sideForm", chart);
model.put("chartOneDatasource", chartOneDatasource);
model.put("chartTwoDatasource", chartTwoDatasource);
model.put("chartThreeDatasource", chartThreeDatasource);
model.put("chartFourDatasource", chartFourDatasource);
model.put("breadcrumbOne", breadcrumbOne);
model.put("breadcrumbTwo", breadcrumbTwo);
model.put("breadcrumbThree", breadcrumbThree);
model.put("breadcrumbFour", breadcrumbFour);
model.put("bulletin", bulletin);
}
return "land";
}
@RequestMapping(method = RequestMethod.POST)
public String loadCharts(HttpServletRequest request, ModelMap model, @ModelAttribute("sideForm") Chart chart) {
String from_date = request.getParameter("startDt");
String to_date = request.getParameter("endDt");
chart.setStartDt(from_date);
chart.setEndDt(to_date);
ChartData cd = new ChartData();
BulletinData bd = new BulletinData();
String bulletin = bd.getBulletinData();
AdminChartSummaryData acsd = new AdminChartSummaryData();
List<AdminChart> list = acsd.getLandingChartDataList();
if (list.size() == 4) {
Chart chart1 = new Chart(list.get(0));
Chart chart2 = new Chart(list.get(1));
Chart chart3 = new Chart(list.get(2));
Chart chart4 = new Chart(list.get(3));
model.put("chart1", chart1);
model.put("chart2", chart2);
model.put("chart3", chart3);
model.put("chart4", chart4);
String chartOneDatasource = cd.fetchChartDatasourceName(chart1
.getChartSubgroup());
String chartTwoDatasource = cd.fetchChartDatasourceName(chart2
.getChartSubgroup());
String chartThreeDatasource = cd.fetchChartDatasourceName(chart3
.getChartSubgroup());
String chartFourDatasource = cd.fetchChartDatasourceName(chart4
.getChartSubgroup());
model.put("chartOneDatasource", chartOneDatasource);
model.put("chartTwoDatasource", chartTwoDatasource);
model.put("chartThreeDatasource", chartThreeDatasource);
model.put("chartFourDatasource", chartFourDatasource);
String breadcrumbOne = chart1.getChartGroup() + ">>"
+ chart1.getChartSubgroup();
String breadcrumbTwo = chart2.getChartGroup() + ">>"
+ chart2.getChartSubgroup();
String breadcrumbThree = chart3.getChartGroup() + ">>"
+ chart3.getChartSubgroup();
String breadcrumbFour = chart4.getChartGroup() + ">>"
+ chart4.getChartSubgroup();
model.put("breadcrumbOne", breadcrumbOne);
model.put("breadcrumbTwo", breadcrumbTwo);
model.put("breadcrumbThree", breadcrumbThree);
model.put("breadcrumbFour", breadcrumbFour);
}
return "land";
}
@ModelAttribute("timeline")
public Collection<String> populateTimeline() {
return Arrays.asList("Daily", "Weekly", "Monthly", "Quarterly",
"Annually", "12_Month_Rolling");
}
}
This page gets values from a form shown below:
此页面从如下所示的表单中获取值：
<form:form commandName="sideForm">
<div style="font-weight:bold; color:#000">Timeline</div>
<div style="margin:0 0 5px 0;"><form:select path="timeline" items="${timeline}" id="tm"/></div>
<div class="tofrom">From:</div>
<form:input path="startDt" id="from_date" size="7" maxlength="10" />
<div class="tofrom">To:</div>
<form:input path="endDt" id="to_date" size="7" maxlength="12" />
<input type="submit" value="Update Chart" />
</form:form>
回答by Dan Hargis
Make sure that your Spring form mentions the modelAttribute="<Model Name".
确保您的 Spring 表单提及modelAttribute="<Model Name".
Example:
例子：
@Controller
@RequestMapping("/greeting.html")
public class GreetingController {
@ModelAttribute("greeting")
public Greeting getGreetingObject() {
return new Greeting();
}
/**
* GET
*
*
*/
@RequestMapping(method = RequestMethod.GET)
public String handleRequest() {
return "greeting";
}
/**
* POST
*
*
*/
@RequestMapping(method = RequestMethod.POST)
public ModelAndView processSubmit(@ModelAttribute("greeting") Greeting greeting, BindingResult result){
ModelAndView mv = new ModelAndView();
mv.addObject("greeting", greeting);
return mv;
}
}
In your JSP :
在您的 JSP 中：
<form:form modelAttribute="greeting" method="POST" action="greeting.html">
回答by user473445
Make sure you declare the bean associated with the form in GET method of the associated controller and also add it in the model model.addAttribute("uploadItem", uploadItem);which contains @RequestMapping(method = RequestMethod.GET)annotation.
确保在关联控制器的 GET 方法中声明与表单关联的 bean，并将其添加到model.addAttribute("uploadItem", uploadItem);包含@RequestMapping(method = RequestMethod.GET)注释的模型中。
For example UploadItem.java is associated with myform.jsp and controller is SecureAreaController.java
例如 UploadItem.java 与 myform.jsp 相关联，控制器是 SecureAreaController.java
myform.jsp contains
myform.jsp 包含
<form:form action="/securedArea" commandName="uploadItem" enctype="multipart/form-data"></form:form>
MyFormController.java
表单控制器.java
@RequestMapping("/securedArea")
@Controller
public class SecureAreaController {
@RequestMapping(method = RequestMethod.GET)
public String showForm(Model model) {
UploadItem uploadItem = new UploadItem(); // declareing
model.addAttribute("uploadItem", uploadItem); // adding in model
return "securedArea/upload";
}
}
As you can see I am declaring UploadItem.java in controller GET method.
如您所见，我在控制器 GET 方法中声明了 UploadItem.java。
回答by Rob Beardow
Try adding a BindingResult parameter to methods annotated with @RequestMappingwhich have a @ModelAttributeannotated parameters. After each @ModelAttributeparameter, Spring looks for a BindingResult in the next parameter position (order is important).
尝试将 BindingResult 参数添加到带有注释参数@RequestMapping的@ModelAttribute注释方法中。在每个@ModelAttribute参数之后，Spring 会在下一个参数位置查找 BindingResult（顺序很重要）。
So try changing:
所以尝试改变：
@RequestMapping(method = RequestMethod.POST)
public String loadCharts(HttpServletRequest request, ModelMap model, @ModelAttribute("sideForm") Chart chart)
...To:
到：
@RequestMapping(method = RequestMethod.POST)
public String loadCharts(@ModelAttribute("sideForm") Chart chart, BindingResult bindingResult, HttpServletRequest request, ModelMap model)
...回答by ravindra
I worked on this same issue and I am sure I have found out the exact reason for it.
我研究过同样的问题，我相信我已经找到了它的确切原因。
Neither BindingResult nor plain target object for bean name 'command' available as request attribute
bean 名称“命令”的 BindingResult 和普通目标对象都不能用作请求属性
If your successView property value (name of jsp page) is the same as your input page name, then second value of ModelAndView constructor must be match with the commandName of the input page.
如果您的 successView 属性值（jsp 页面的名称）与您的输入页面名称相同，则 ModelAndView 构造函数的第二个值必须与输入页面的 commandName 匹配。
E.g.
例如
index.jsp
索引.jsp
<html>
<body>
<table>
<tr><td><a href="Login.html">Login</a></td></tr>
</table>
</body>
</html>
dispatcher-servlet.xml
调度程序-servlet.xml
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="urlMapping"
class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="urlMap">
<map>
<entry key="/Login.html">
<ref bean="userController"/>
</entry>
</map>
</property>
</bean>
<bean id="userController" class="controller.AddCountryFormController">
<property name="commandName"><value>country</value></property>
<property name="commandClass"><value>controller.Country</value></property>
<property name="formView"><value>countryForm</value></property>
<property name="successView"><value>countryForm</value></property>
</bean>
AddCountryFormController.java
添加国家/地区FormController.java
package controller;
import javax.servlet.http.*;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.mvc.SimpleFormController;
public class AddCountryFormController extends SimpleFormController
{
public AddCountryFormController(){
setCommandName("Country.class");
}
protected ModelAndView onSubmit(HttpServletRequest request,HttpServletResponse response,Object command,BindException errors){
Country country=(Country)command;
System.out.println("calling onsubmit method !!!!!");
return new ModelAndView(getSuccessView(),"country",country);
}
}
Country.java
国家.java
package controller;
public class Country
{
private String countryName;
public void setCountryName(String value){
countryName=value;
}
public String getCountryName(){
return countryName;
}
}
countryForm.jsp
countryForm.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html>
<body>
<form:form commandName="country" method="POST" >
<table>
<tr><td><form:input path="countryName"/></td></tr>
<tr><td><input type="submit" value="Save"/></td></tr>
</table>
</form:form>
</body>
<html>
Input page commandName="country"ModelAndView Constructor as return new ModelAndView(getSuccessView(),"country",country);Means inputpage commandName==ModeAndView(,"commandName",)
输入页面commandName="country"ModelAndView Constructor as return new ModelAndView(getSuccessView(),"country",country);表示输入页面commandName==ModeAndView(,"commandName",)
回答by Rohit Singh
We faced the same issue and changed commandname=""to modelAttribute=""in jsp page to solve this issue.
我们面临着同样的问题，并改变commandname=""以modelAttribute=""在JSP页面来解决这个问题。
回答by NBV Sarma
I have encountered this problem as well. Here is my solution:
我也遇到过这个问题。这是我的解决方案：
Below is the error while running a small Spring Application:-
以下是运行小型 Spring 应用程序时的错误：-
*HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
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 /WEB-INF/jsp/employe.jsp at line 12
9: <form:form method="POST" commandName="command" action="/SpringWeb/addEmploye">
10: <table>
11: <tr>
12: <td><form:label path="name">Name</form:label></td>
13: <td><form:input path="name" /></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: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: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:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
root cause
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'command' available as 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.employe_jsp._jspx_meth_form_005flabel_005f0(employe_jsp.java:185)
org.apache.jsp.WEB_002dINF.jsp.employe_jsp._jspx_meth_form_005fform_005f0(employe_jsp.java:120)
org.apache.jsp.WEB_002dINF.jsp.employe_jsp._jspService(employe_jsp.java:80)
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: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:644)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.26 logs.*
In order to resolve this issue you need to do the following in the controller class:-
为了解决此问题，您需要在控制器类中执行以下操作：-
- Change the import package from "
import org.springframework.web.portlet.ModelAndView;" to "import org.springframework.web.servlet.ModelAndView;"... - Recompile and run the code... the problem should get resolved.
- 将导入包从“
import org.springframework.web.portlet.ModelAndView;”改为“import org.springframework.web.servlet.ModelAndView;”... - 重新编译并运行代码......问题应该得到解决。
