Question

hibernate.cf.xml文件

<hibernate-configuration>        
<session-factory>  

 <property name="hbm2ddl.auto">create</property>  
 <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>  
 <property name="connection.url">jdbc:oracle:thin:@localhost:1521:xe</property>  
 <property name="connection.username">system</property>
 <property name="connection.password">Password</property>  
 <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>  

 <mapping class="com.mypackage.UserDetails"/>
 <!-- <mapping class="com.mypackage.Address1"/> -->

 </session-factory>        
</hibernate-configuration>

UserDetails实体

package com.mypackage;

@Entity
@Table(name="UserDetailsTable")
public class UserDetails {
    @Id
    //@GeneratedValue//(strategy = GenerationType.AUTO)
    private int userId;

    private String userName;
    @Embedded
    private Address1 address;

    private String phoneNo;
    private Date date;
}

可嵌入实体

package com.mypackage;

@Embeddable
public class Address1 {
    private String street;
    private String city;
    private String state;
    private String pincode;     
}

主要类

public class Test {     
    public static void main(String[] args) {        
        Session session=new AnnotationConfiguration().
                configure().buildSessionFactory().openSession();

        Transaction t=session.beginTransaction();
        Address1 addrobj1=new Address1();
        addrobj1.setStreet("karunechi");
        addrobj1.setCity("Edakkara");
        addrobj1.setState("Malappuram");
        addrobj1.setPincode("679331");

        UserDetails obj1=new UserDetails();
        obj1.setUserId(1);
        obj1.setUserName("kannan s nair");
        obj1.setAddress(addrobj1);
        obj1.setPhoneNo("9633835509");

        session.saveOrUpdate(addrobj1);         
        t.commit();
        session.close();
        System.out.println("saved successfully");
    }    
}

错误上eclipse juno是：

log4j：WARN找不到记录器的appender （org.hibernate.cfg.annotations.Version）。 log4j：WARN请初始化 log4j系统正常。线程“main”中的异常 org.hibernate.MappingException：未知实体：com.mypackage.Address1 在 org.hibernate.impl.SessionFactoryImpl.getEntityPersister（SessionFactoryImpl.java:548）在 org.hibernate.impl.SessionImpl.getEntityPersister（SessionImpl.java:1338）在org.hibernate.engine.ForeignKeys.isTransient（ForeignKeys.java:180）在 org.hibernate.event.def.AbstractSaveEventListener.getEntityState（AbstractSaveEventListener.java:487）在 org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate（DefaultSaveOrUpdateEventListener.java:84）在 org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate（DefaultSaveOrUpdateEventListener.java:70）在 org.hibernate.impl.SessionImpl.fireSaveOrUpdate（SessionImpl.java:507）在org.hibernate.impl.SessionImpl.saveOrUpdate（SessionImpl.java:499）在org.hibernate.impl.SessionImpl.saveOrUpdate（SessionImpl.java:495）在com.mypackage.Test.main（Test.java:33）

无法解决错误。
有人请帮帮忙吗？

Answer 1

您已对地图类别进行了评论，因此无法找到它

Answer 2

请将Address1 bean的映射标记添加到您的hibernate配置文件中，如果您创建了Address1 bean的映射文件，则创建它。

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC 
 "-//Hibernate/Hibernate Mapping DTD//EN"
 "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> 

<hibernate-mapping>
<class name="Address1" table="ADDRESS1">
      <meta attribute="class-description">
         This class contains the address detail. 
      </meta>
      <id name="id" type="int" column="id">
         <generator class="native"/>
      </id>
      <property name="street" column="street_name" type="string"/>
      <property name="city" column="city_name" type="string"/>
      <property name="state" column="state_name" type="string"/>
      <property name="zipcode" column="zipcode" type="string"/>
   </class>
</hibernate-mapping>

您还可以使用以下标记在配置文件中添加实体映射

  <mapping resource>com/mypackage/Address1.hbm.xml</mapping resource>

或者您必须使用

将类显式添加到配置中

configuration.addClass(com.mypackage.Address1.class)
// Read mappings as a application resourceName
 // addResource is for add hbml.xml files in case of declarative approach
configuration.addResource("com.mypackage.Address1.xml")

线程“main”中的异常org.hibernate.MappingException：未知实体：com.mypackage.Address1

2 个答案: