Hibernate下在@MappedSuperclass注释的类下使用@ManyToMany的问题

Question

@MappedSuperclass
public class SuperClass
{
  
  @ManyToOne(fetch=FetchType.EAGER,cascade=CascadeType.ALL)
  @JoinColumn(name="OtherId",referencedColumnName="CurrId")
  private OtherClass other=null;*/}@Entity
public class SubClass extends SuperClass
{
 
}
@Entity
public class OtherClass
{
 
  @Id
  @Column(name="CurrId")
  private long CurrId;
  
  @OneToMany(fetch=FetchType.EAGER,cascade=CascadeType.ALL,mappedBy="addedBy")
  private Set<SuperClass> classes=null;
    
}
但是在运行时报了如下错误：请问各位高手是什么原因啊？？
org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class:com.ee.work.OtherClass.classes[com.ee.work.SuperClass]
at org.hibernate.cfg.annotations.CollectionBinder.bindManyToManySecondPass(CollectionBinder.java:1033)
at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:576)
at org.hibernate.cfg.annotations.CollectionBinder$1.secondPass(CollectionBinder.java:517)
at org.hibernate.cfg.CollectionSecondPass.doSecondPass(CollectionSecondPass.java:43)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1130)
at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:316)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1286)
at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:915)
at com.rsco.workflow.jdbc.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:40)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:61)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:877)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:839)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:221)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:593)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

Answer 1

哦 这写的不对，但是不管是manytomany 还是manytoone 都是报这个错误。。有高手知道怎么解决吗？

Answer 2

这两个你都没指定targetEntity 能对么?...话说回来@MappedSuperclass用的很多么?..

Answer 3

使用“@MappedSuperclass”，就说明使用了“一个子类一张表”的模式，这种模式说是不具有多态性的，所以你可以尝试把“private Set<SuperClass> classes=null;”改成“private Set<SubClass> classes;”。
更明显的错误是：以下A段和B段并没有做到对应；应该将“private OtherClass other=null;”改成“private OtherClass addedBy;”，其中“addedBy”的命名必须与“mappedBy="addedBy"”的指定一致！A：@ManyToOne(fetch=FetchType.EAGER,cascade=CascadeType.ALL)
  @JoinColumn(name="OtherId",referencedColumnName="CurrId")
  private OtherClass other=null;
---------------------------------
B：@OneToMany(fetch=FetchType.EAGER,cascade=CascadeType.ALL,mappedBy="addedBy")
  private Set<SuperClass> classes=null;