Question

我有一个子类，它覆盖了超类的getter（因为它添加了不同的行为）。我正在使用@AttributeOverride，但它会抛出错误 org.hibernate.MappingException：com.hbmap.domain.Product 中找到的名称的重复属性映射。

我不确定我是否做错了。

产品：

@Entity
@Table(name = "product")
@Access(AccessType.PROPERTY)
@AttributeOverride(name = "name", column = @Column(name = "name") )
public class Product extends Properties {

  private Long id;

  @Id
  @Column(name = "id")
  @GeneratedValue(strategy = GenerationType.AUTO)
  public Long getId() {
    return id;
  }

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

  @Override
  public String getName() {
    // Do something different than superclass
    return super.getName();
  }
}

属性（超类）：

@MappedSuperclass
@Access(AccessType.PROPERTY)
public class Properties {
  private String name;

  @Column(name="name")
  public String getName() {
    return name;
  }

  public void setName(String name) {
    this.name = name;
  }
}

已编辑1

完整的堆栈跟踪：

org.hibernate.MappingException：在com.hbmap.domain.Product中找到的名称的重复属性映射在org.hibernate.mapping.PersistentClass.checkPropertyDuplication（PersistentClass.java:515）在org.hibernate.mapping.PersistentClass.validate（PersistentClass.java:505）在org.hibernate.mapping.RootClass.validate（RootClass.java:270）在org.hibernate.cfg.Configuration.validate（Configuration.java:1360）在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1851）在org.hibernate.cfg.Configuration.buildSessionFactory（Configuration.java:1930）在org.springframework.orm.hibernate4.LocalSessionFactoryBuilder.buildSessionFactory（LocalSessionFactoryBuilder.java:372）在org.springframework.orm.hibernate4.LocalSessionFactoryBean.buildSessionFactory（LocalSessionFactoryBean.java:454）在org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet（LocalSessionFactoryBean.java:439）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1633）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1570）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:539）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:476） at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:303）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:299）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:194）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference（BeanDefinitionValueResolver.java:351）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary（BeanDefinitionValueResolver.java:108）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues（AbstractAutowireCapableBeanFactory.java:1477）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1222）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:537）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:476） at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:303）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:299）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:194）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference（BeanDefinitionValueResolver.java:351）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary（BeanDefinitionValueResolver.java:108）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues（AbstractAutowireCapableBeanFactory.java:1477）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1222）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:537）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:476） at org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:303）在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:230）在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:299）在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:194） at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:755）在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:757）在org.springframework.context.support.AbstractApplicationContext.refresh（AbstractApplicationContext.java:480）在org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext（FrameworkServlet.java:663）在org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext（FrameworkServlet.java:629）在org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext（FrameworkServlet.java:677）在org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext（FrameworkServlet.java:548）在org.springframework.web.servlet.FrameworkServlet.initServletBean（FrameworkServlet.java:489）在org.springframework.web.servlet.HttpServletBean.init（HttpServletBean.java:136）在javax.servlet.GenericServlet.init（GenericServlet.java:158）在org.apache.catalina.core.StandardWrapper.initServlet（StandardWrapper.java:1231）在org.apache.catalina.core.StandardWrapper.loadServlet（StandardWrapper.java:1144）在org.apache.catalina.core.StandardWrapper.load（StandardWrapper.java:1031） at org.apache.catalina.core.StandardContext.loadOnStartup（StandardContext.java:4914）在org.apache.catalina.core.StandardContext.startInternal（StandardContext.java:5201）在org.apache.catalina.util.LifecycleBase.start（LifecycleBase.java:150）在org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1409）在org.apache.catalina.core.ContainerBase $ StartChild.call（ContainerBase.java:1399） at java.util.concurrent.FutureTask.run（Unknown Source） at java.util.concurrent.ThreadPoolExecutor.runWorker（Unknown Source） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（Unknown Source）在java.lang.Thread.run（未知来源）

Answer 1

我找到了一个解决方案，我不知道它是否是最好的，但它确实有效...... 将 @Transient 添加到子类中的getter。

<强>产品：

@Entity
@Table(name = "product")
@Access(AccessType.PROPERTY)
@AttributeOverride(name = "name", column = @Column(name = "name") )
public class Product extends Properties {

  private Long id;

  @Id
  @Column(name = "id")
  @GeneratedValue(strategy = GenerationType.AUTO)
  public Long getId() {
    return id;
  }

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

  @Override
  @Transient
  public String getName() {
    // Do something different than superclass
    return super.getName();
  }
}

Answer 2

此处的问题是，您在getName()类中覆盖Product方法，该方法将重复使用@Column注释两次，并尝试为{{1}创建两个列}。

这就是你获得例外的原因：

org.hibernate.MappingException：在com.hbmap.domain.Product中找到的名称的重复属性映射

所以只需从name类中删除Overriden方法，因为它会自动从超级类中获取名称，因为Product会为你做这个，删除它：

Inheritance

修改

如果您需要覆盖它，使用带有覆盖方法的@Override public String getName() { return super.getName(); }将在映射中跳过此新列。

Hibernate AttributeOverride不起作用

2 个答案: