我不是 hibernate 的常客。我正在尝试创建多对一映射，但出现错误 (subj)。我一直在寻找类声明中的错误，还有 getter(最后一个错误)，但一切似乎都是正确的。有人在我的代码中看到任何错误吗？因为我无法弄清楚。

Adres.java

package beans; 
 
public class Adres { 
 
  int id; 
  String adresas; 
  String adname; 
 
  public Adres() { 
  } 
 
  public int getId() { 
      return id; 
  } 
 
  public void setId(int id) { 
      this.id = id; 
  } 
 
  public String getAdresas() { 
      return adresas; 
  } 
 
  public void setAdresas(String adresas) { 
      this.adresas = adresas; 
  } 
 
  public String getAdname() { 
      return adname; 
  } 
 
  public void setAdname(String adname) { 
      this.adname = adname; 
  } 
} 

Men.java

package beans; 
 
public class Men { 
 
  int id; 
  String name; 
 
  Adres adres; 
 
  public Men() { 
  } 
 
  public int getId() { 
      return id; 
  } 
 
  public void setId(int id) { 
      this.id = id; 
  } 
 
  public String getName() { 
      return name; 
  } 
 
  public void setName(String name) { 
      this.name = name; 
  } 
 
  public Adres getAdd() { 
      return adres; 
  } 
 
  public void setAdd(Adres adres) { 
      this.adres = adres; 
  } 
} 

hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
  <session-factory> 
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> 
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> 
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/db2</property> 
    <property name="hibernate.connection.username">user</property> 
    <property name="hibernate.connection.password">pass</property> 
    <property name="hibernate.show_sql">true</property> 
    <mapping resource="hbm/Men.hbm.xml"/> 
    <mapping resource="hbm/Adres.hbm.xml"/> 
  </session-factory> 
</hibernate-configuration> 

Men.hbm.xml

<hibernate-mapping> 
  <class name="beans.Men" table="MEN"> 
     <id column="id" name="id" type="int"> 
       <generator class="native"/> 
     </id> 
     <property column="name" name="name" type="string"/> 
     <many-to-one class="beans.Adres" column="adres" name="adres" not-null="true"/> 
   </class> 
 </hibernate-mapping> 

Adres.bbm.xml

<hibernate-mapping> 
  <class name="beans.Adres" table="ADRES"> 
    <id name="id" type="int" column="id"> 
      <generator class="native"/> 
    </id> 
    <property name="adresas" column="adresas" type="string"/> 
    <property name="adname" column="adname" type="string"/> 
  </class> 
</hibernate-mapping> 

Main.java

private static SessionFactory factory; 
 
    public static void main(String[] args) { 
        try { 
            factory = new Configuration().configure().buildSessionFactory(); 
        } catch (Throwable ex) { 
            System.err.println("Failed to create sessionFactory object." + ex); 
            throw new ExceptionInInitializerError(ex); 
        } 
    } 

Error log

Initial SessionFactory creation failed.org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister 
Exception in thread "main" java.lang.ExceptionInInitializerError 
    at main.HibernateUtil.<clinit>(HibernateUtil.java:15) 
    at main.Main.main(Main.java:17) 
Caused by: org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister 
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:123) 
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:77) 
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:346) 
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:444) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708) 
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724) 
    at main.HibernateUtil.<clinit>(HibernateUtil.java:12) 
    ... 1 more 
Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] 
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:91) 
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:116) 
    at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:388) 
    at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:508) 
    at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:124) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422) 
    at org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:96) 
    ... 7 more 
Caused by: java.lang.reflect.InvocationTargetException 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422) 
    at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:88) 
    ... 16 more 
Caused by: org.hibernate.PropertyNotFoundException: Could not locate getter method for property [beans.Men#adres] 
    at org.hibernate.internal.util.ReflectHelper.findGetterMethod(ReflectHelper.java:400) 
    at org.hibernate.property.access.internal.PropertyAccessBasicImpl.<init>(PropertyAccessBasicImpl.java:41) 
    at org.hibernate.property.access.internal.PropertyAccessStrategyBasicImpl.buildPropertyAccess(PropertyAccessStrategyBasicImpl.java:27) 
    at org.hibernate.mapping.Property.getGetter(Property.java:299) 
    at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:270) 
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:145) 
    at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:63) 
    ... 21 more 

请您参考如下方法:

您应该更改 Men 类中 adres 属性的 getter 和 setter

public Adres getAdd() { 
    return adres; 
} 
 
public void setAdd(Adres adres) { 
    this.adres = adres; 
} 

到

public Adres getAdres() { 
    return adres; 
} 
 
public void setAdres(Adres adres) { 
    this.adres = adres; 
} 

我建议给一个有意义的变量名和相关的getters，setters!