Discussion :

[kanebody]

bonjour

j' ai un problème pour affiche le catégorie dans une liste de roulante merci
pour votre aide

voici le message d' erreur

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 java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'category' 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:178)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getPropertyPath(AbstractDataBoundFormElementTag.java:198)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getName(AbstractDataBoundFormElementTag.java:164)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.autogenerateId(AbstractDataBoundFormElementTag.java:151)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.resolveId(AbstractDataBoundFormElementTag.java:142)
	at org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.writeDefaultAttributes(AbstractDataBoundFormElementTag.java:126)
	at org.springframework.web.servlet.tags.form.AbstractHtmlElementTag.writeDefaultAttributes(AbstractHtmlElementTag.java:421)
	at org.springframework.web.servlet.tags.form.SelectTag.writeTagContent(SelectTag.java:199)
	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.views.categorylist_jsp._jspService(categorylist_jsp.java:137)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	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:728)
	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:749)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
	at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
	at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262)
	at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1180)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:950)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:147)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
 
nov. 09, 2013 2:20:18 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [] threw exception [An exception occurred processing JSP page /WEB-INF/views/categorylist.jsp at line 29
 
26: 				<tr>
27: 					<td> Category:</td>
28: 					 <td> 
29: 	                       <form:select path="name">
30: 						        <c:forEach var="category" items="${categoryList}">   									        
31: 					            	<form:option value="${category.id}">${category.name}</form:option>      
32: 					            </c:forEach>
 
 
Stacktrace:] with root cause
java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'category' available as request attribute
	at org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141)

voici le fichier jsp

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 <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib uri='http://java.sun.com/jsp/jstl/core' prefix='c'%>
 
 
<!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" />
<title>Insert title here</title>
</head>
<body>
   <c:choose>
			<c:when test="${category.id==null}">
				Création 
			</c:when>
			<c:otherwise>
				<title>Edit Category:${category.name}</title>
			</c:otherwise>
		</c:choose>
 <form:form commandName="category" method="post" action='<%=response.encodeUrl("/category/categorylist")%>'>
 
		<fieldset>
			<table>
				<tr>
					<td> Category:</td>
					 <td> 
	                       <form:select path="name">
						        <c:forEach var="category" items="${categoryList}">   									        
					            	<form:option value="${category.id}">${category.name}</form:option>      
					            </c:forEach>
		            	  </form:select>
		            </td>
 
				</tr>
 
				<tr>
				  <td><input type="submit"  value="<c:choose><c:when test="${category.id==null}">Add </c:when><c:otherwise>Edit Category</c:otherwise></c:choose>"/></td>
 
				</tr>
			</table>
		</fieldset>
		<a href="<c:url value='/'/>">home page</a><br/>
 
</form:form>
</body>
</html>

voici le contrôleur

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package com.bbstore.controller;
 
import java.util.List;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
 
import com.bbstore.model.Category;
import com.bbstore.repository.CategoryRepository;
 
@Controller
public class CategoryListController {
    @Autowired
    CategoryRepository categoryRepository;
 
    @RequestMapping("/categorylist")
    public ModelAndView categoryList() {
        ModelAndView mv = new ModelAndView("categorylist");
        List<Category> list = categoryRepository.findAll();
        mv.addObject("categoryList", list);
        return mv;
 
    }
 
}

voici la classe category

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package com.bbstore.model;
 
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
 
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;
import javax.persistence.OrderBy;
 
@Entity
public class Category implements Serializable {
 
    /**
       */
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long Id;
    private String name;
    private String description;
 
 
    @OneToMany(mappedBy = "category",fetch = FetchType.LAZY)
    private List<Product> product = new ArrayList<Product>();
 
    public Category() {
        super();
    }
 
    public Category(String name, String description, List<Product> product) {
        super();
        this.name = name;
        this.description = description;
        this.product = product;
    }
 
    public Long getId() {
        return Id;
    }
 
    public void setId(Long id) {
        Id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public String getDescription() {
        return description;
    }
 
    public void setDescription(String description) {
        this.description = description;
    }
 
    public List<Product> getProduct() {
        return product;
    }
 
    public void setProduct(List<Product> product) {
        this.product = product;
    }
 
}