私の春にHibernateプロジェクト

Question

Here is the table of data

上にInvocationTargetExceptionを取得する私はMySQLでデータベースを使用するCRUDとシンプルな休止/春を作成しました。すべてが機能しますが、編集機能はあります。それはこのエラーと言う。

root cause 

org.springframework.beans.InvalidPropertyException: Invalid property 'id' of bean class [org.jjm.test.model.Phone_$$_jvst33c_0]: Getter for property 'id' threw exception; nested exception is java.lang.reflect.InvocationTargetException 
    org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:704) 
    org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:610) 
    org.springframework.validation.AbstractPropertyBindingResult.getActualFieldValue(AbstractPropertyBindingResult.java:99) 
    org.springframework.validation.AbstractBindingResult.getFieldValue(AbstractBindingResult.java:229) 
    org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:120) 
    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.HiddenInputTag.writeTagContent(HiddenInputTag.java:79) 
    org.springframework.web.servlet.tags.form.AbstractFormTag.doStartTagInternal(AbstractFormTag.java:84) 
    org.springframework.web.servlet.tags.RequestContextAwareTag.doStartTag(RequestContextAwareTag.java:80) 
    org.apache.jsp.WEB_002dINF.views.phoneDetails_jsp._jspx_meth_form_005fhidden_005f0(phoneDetails_jsp.java:322) 
    org.apache.jsp.WEB_002dINF.views.phoneDetails_jsp._jspx_meth_form_005fform_005f0(phoneDetails_jsp.java:231) 
    org.apache.jsp.WEB_002dINF.views.phoneDetails_jsp._jspService(phoneDetails_jsp.java:175) 
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438) 
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396) 
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:168) 
    org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:303) 
    org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244) 
    org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027) 
    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971) 
    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) 
    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 
    org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:622) 
    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) 
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 

私のIDでエラーが発生しますが、私のコードではエラーが表示されません。私は

@Id 
@Column(name="id") 
@GeneratedValue(strategy=GenerationType.IDENTITY) 
Integer id; 

それがなぜに変更し、データ

<table> 
     <tr> 
      <th colspan="2">Add Phone</th> 
     </tr> 
     <tr> 
     <form:hidden path="id" /> 
      <td><form:label path="phoneName">Phone Name:</form:label></td> 
      <td><form:input path="phoneName" size="30" maxlength="30"></form:input></td> 
     </tr> 
     <tr> 
       <td><form:label path="make">Make:</form:label></td> 
      <td><form:input path="make" size="30" maxlength="30"></form:input></td> 
     </tr> 
     <tr> 
       <td><form:label path="price">Price:</form:label></td> 
      <td><form:input path="price" size="30" maxlength="30"></form:input></td> 
     </tr> 
     <tr> 
       <td><form:label path="storage">Storage:</form:label></td> 
      <td><form:input path="storage" size="30" maxlength="30"></form:input></td> 
     </tr> 
     <tr> 
       <td><form:label path="camera">Camera:</form:label></td> 
      <td><form:input path="camera" size="30" maxlength="30"></form:input></td> 
     </tr>  
     <tr> 
      <td colspan="2"><input type="submit" 
       class="blue-button" /></td> 
     </tr> 
    </table> 

Answer 1

entitysのIDがNULL可能である必要がありますを表示していますどこ

package org.jjm.test.model; 

import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.Table; 
/* 
* This is the model class and it corresponds to Phone table in the database 
*/ 
@Entity 
@Table(name="PHONE") 
public class Phone { 

    @Id 
    @Column(name="id") 
    @GeneratedValue(strategy=GenerationType.IDENTITY) 
    int id; 

    @Column(name="phoneName") 
    String phoneName; 

    @Column(name="make") 
    String make; 

    @Column(name="price") 
    double price; 

    @Column(name="storage") 
    String storage; 

    @Column(name="camera") 
    String camera; 


    public Phone() { 
     super(); 
    } 


    public Phone(int i, String phoneName, String make, double price, String storage, String camera) { 
     super(); 
     this.id = i; 
     this.phoneName = phoneName; 
     this.make = make; 
     this.price = price; 
     this.storage = storage; 
     this.camera = camera; 
    } 

    public int getId() { 
     return id; 
    } 


    public void setId(int id) { 
     this.id = id; 
    } 


    public String getPhoneName() { 
     return phoneName; 
    } 


    public void setPhoneName(String phoneName) { 
     this.phoneName = phoneName; 
    } 


    public String getMake() { 
     return make; 
    } 


    public void setMake(String make) { 
     this.make = make; 
    } 


    public double getPrice() { 
     return price; 
    } 


    public void setPrice(double price) { 
     this.price = price; 
    } 


    public String getStorage() { 
     return storage; 
    } 


    public void setStorage(String storage) { 
     this.storage = storage; 
    } 


    public String getCamera() { 
     return camera; 
    } 


    public void setCamera(String camera) { 
     this.camera = camera; 
    } 

} 

はこれがありますか？新しいエンティティを挿入する途中でIDはnullでなければなりません。 0とか、あるいは162と言っても、すでにデータベースで使われているかもしれません。