大家好,我的 JPA 项目有问题。Fichier.java 结束 Application.java 实现了一个接口“FileSystemElement.java”那些是我的类 Application.java
package com.bfi.webtop.model;
import java.io.Serializable;
import java.util.*;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.IdClass;
import javax.persistence.Table;
/** @pdOid d477195f-149e-4336-8586-19d6a09ee2d4 */
@Entity
@Table(name="application_")
public abstract class Application implements FileSystemElement, Serializable {
// public Application() {
// super();
// }
public Application(int id_app, String url) {
super();
this.id_app = id_app;
this.url = url;
}
public Application() {
super();
// TODO Auto-generated constructor stub
}
private int id_app;
private java.lang.String url;
/**
* @return the url
*/
public java.lang.String getUrl() {
return url;
}
/**
* @param url the url to set
*/
public void setUrl(java.lang.String url) {
this.url = url;
}
/**
* @return the id_app
*/
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public int getId_app() {
return id_app;
}
/**
* @param id_app the id_app to set
*/
public void setId_app(int id_app) {
this.id_app = id_app;
}
}
Fichier.java
package com.bfi.webtop.model;
/***********************************************************************
* Module: Fichier.java
* Author: Marwa
* Purpose: Defines the Class Fichier
***********************************************************************/
import java.util.*;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public abstract class Fichier implements FileSystemElement {
private int id_fichier;
private java.lang.String extension;
private java.lang.Boolean supprim;
/**
* @return the extension
*/
public java.lang.String getExtension() {
return extension;
}
/**
* @param extension the extension to set
*/
public void setExtension(java.lang.String extension) {
this.extension = extension;
}
/**
* @return the supprim
*/
public java.lang.Boolean getSupprim() {
return supprim;
}
/**
* @param supprim the supprim to set
*/
public void setSupprim(java.lang.Boolean supprim) {
this.supprim = supprim;
}
/**
* @return the id_fichier
*/
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public int getId_fichier() {
return id_fichier;
}
/**
* @param id_fichier the id_fichier to set
*/
public void setId_fichier(int id_fichier) {
this.id_fichier = id_fichier;
}
public Fichier() {
super();
}
}
文件系统元素.java
package com.bfi.webtop.model;
import javax.annotation.Generated;
import javax.persistence.metamodel.StaticMetamodel;
@Generated(value="Dali", date="2013-01-28T10:33:26.416+0100")
@StaticMetamodel(FileSystemElement.class)
public class FileSystemElement_ {
}
其他类具有相同的结构当我尝试这样做时:jpa tooles> 从实体生成表我有以下错误
线程“主”javax.persistence.PersistenceException 中的异常:异常> [EclipseLink-28019](Eclipse Persistence Services - 2.4.0.v20120608-r11652):org.eclipse.persistence.exceptions.EntityManagerSetupException 异常描述:部署 PersistenceUnit [webtop ] 失败的。关闭此 PersistenceUnit 的所有工厂。内部异常:异常 [EclipseLink-0] (Eclipse Persistence Services - 2.4.0.v20120608-r11652):org.eclipse.persistence.exceptions.IntegrityException
描述符例外:
异常 [EclipseLink-34] (Eclipse Persistence Services - 2.4.0.v20120608-r11652):org.eclipse.persistence.exceptions.DescriptorException 异常描述:此类未定义公共默认构造函数,或构造函数引发异常。内部异常:java.lang.InstantiationException 描述符:RelationalDescriptor(com.bfi.webtop.model.Application --> [DatabaseTable(application_)])
异常 [EclipseLink-34] (Eclipse Persistence Services - 2.4.0.v20120608-r11652):org.eclipse.persistence.exceptions.DescriptorException 异常描述:此类未定义公共默认构造函数,或构造函数引发异常。内部异常:java.lang.InstantiationException 描述符:RelationalDescriptor(com.bfi.webtop.model.Fichier --> [DatabaseTable(FICHIER)])
异常 [EclipseLink-34] (Eclipse Persistence Services - 2.4.0.v20120608-r11652):org.eclipse.persistence.exceptions.DescriptorException 异常描述:此类未定义公共默认构造函数,或构造函数引发异常。内部异常:java.lang.InstantiationException 描述符:RelationalDescriptor(com.bfi.webtop.model.Raccourci --> [DatabaseTable(RACCOURCI)])
运行时异常:
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.createDeployFailedPersistenceException(EntityManagerSetupImpl.java:616)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:596)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:186)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:278)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:304)
at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:282)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:85)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:76)
at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:63)
Caused by: Exception [EclipseLink-28019] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.EntityManagerSetupException
异常描述:PersistenceUnit [webtop] 的部署失败。关闭此 PersistenceUnit 的所有工厂。内部异常:异常 [EclipseLink-0] (Eclipse Persistence Services - 2.4.0.v20120608-r11652):org.eclipse.persistence.exceptions.IntegrityException
我正在使用 Eclipse Juno 有什么帮助吗?
}