org.hibernate.MappingException：未知实体： [英] org.hibernate.MappingException: Unknown entity:

问题描述

我有一个独立的应用程序，它使用spring和Hibernate作为JPA，我试图运行测试使用一个主要类

我的主类

  package edu .acct.tsegay.common; 
 
导入edu.acct.tsegay.model.User; 
 import edu.acct.tsegay.business.IUserBusinessObject; 
 
 import org.springframework.context.ApplicationContext; 
 import org.springframework.context.support.ClassPathXmlApplicationContext; 
 
 public class App {
 public static void main（String [] args）{
 try {
 ApplicationContext context = new ClassPathXmlApplicationContext（
Spring3AndHibernate- servlet.xml文件）; 
 IUserBusinessObject userBusinessObject =（IUserBusinessObject）上下文
 .getBean（userBusiness）; 
 
 User user =（User）context.getBean（user1）; 
 user.setPassword（pass）; 
 user.setUsername（tsegay）; 
 System.out.println（user.getPassword（））; 
 
 userBusinessObject.delete（user）; 
 
 User user2 = new User（）; 
 user2.setUsername（habest）; 
 user2.setPassword（pass1）; 
 System.out.println（user2.getPassword（））; 
 / * 
 * userBusinessObject.save（user2）; 
 * 
 * User user3 = userBusinessObject.searchUserbyId（tsegay）; 
 * System.out.println（Search Result：+ user3.getUsername（））; 
 * / 
 System.out.println（Success）; 
} catch（Exception e）{
 e.printStackTrace（）; 
} 
 
} 
 
} 
  

我的应用程序上下文是：

 < beans xmlns =http://www.springframework.org/schema/beans 
 
 xmlns：xsi =http://www.w3.org/2001/XMLSchema-instance
 
 xsi：schemaLocation =http：//www.springframework .org / schema / beans 
 
 http://www.springframework.org/schema/beans/spring-beans-2.5.xsd\"> 
 
<！ - 数据源 - > 
< bean id =dataSource
 class =org.springframework.jdbc.datasource.DriverManagerDataSource> 
< property name =driverClassNamevalue =com.mysql.jdbc.Driver/> 
< property name =urlvalue =jdbc：mysql：// localhost：3306 / test/> 
< property name =usernamevalue =test/> 
< property name =passwordvalue =password/> 
< / bean> 
 
 <！ - 会话工厂 - > 
< bean id =sessionFactory
 class =org.springframework.orm.hibernate3.LocalSessionFactoryBean> 
 
< property name =dataSource> 
< ref bean =dataSource/> 
 
< / property> 
 
< property name =hibernateProperties> 
 
<道具> 
< prop key =hibernate.dialect> org.hibernate.dialect.MySQLDialect< / prop> 
< prop key =hibernate.show_sql> true< / prop> 
< /道具> 
< / property> 
 
 
 
< / bean> 
 
 <！ -   - 公开对象业务对象 - > 
< bean id =userBusinessclass =edu.acct.tsegay.business.UserBusinessObject> 
< property name =userDaoref =userDao/> 
 
< / bean> 
< bean id =user1class =edu.acct.tsegay.model.User> 
< property name =usernamevalue =tse/> 
< property name =passwordvalue =pass/> 
< / bean> 
 
 
<！ - 数据访问对象 - > 
< bean id =userDaoclass =edu.acct.tsegay.dao.UserDao> 
< property name =sessionFactoryref =sessionFactory/> 
< / bean> 
 
 
< / beans> 
  

我的用户模型是：

  package edu.acct.tsegay.model; 
 
 import java.io.Serializable; 
 
 import javax.persistence.Entity; 
 import javax.persistence.Id; 
 import javax.persistence.Version; 
 
 import org.hibernate.annotations.NaturalId; 
 
 @Entity 
 public class User实现Serializable {
 / ** 
 * 
 * / 
 private static final long serialVersionUID = 1L; 
私人字符串用户名; 
私人字符串密码; 
私人整数版本; 
 
 @版本
 public Integer getVERSION（）{
 return VERSION; 
} 
 
 public void setVERSION（Integer vERSION）{
 VERSION = vERSION; 
} 
 @NaturalId 
 public String getUsername（）{
 return username; 
} 
 
 
 public void setUsername（String username）{
 this.username = username; 
} 
 
 public String getPassword（）{
 return password; 
} 
 
 public void setPassword（String password）{
 this.password = password; 
} 
 
} 
  

我的DAO是：

  package edu.acct.tsegay.dao; 
 
导入edu.acct.tsegay.model.User; 
 
 import org.hibernate.SessionFactory; 
 import org.springframework.beans.factory.annotation.Autowired; 
 import org.springframework.orm.hibernate3.HibernateTemplate; 
 
 import org.springframework.stereotype.Repository; 
 
 @Repository 
 public class UserDao实现IUserDao {
 private SessionFactory sessionFactory; 
 
私有HibernateTemplate hibernateTemplate; 
 
 public SessionFactory getSessionFactory（）{
 return sessionFactory; 
} 
 @Autowired 
 public void setSessionFactory（SessionFactory sessionFactory）{
 this.sessionFactory = sessionFactory; 
 this.hibernateTemplate = new HibernateTemplate（sessionFactory）; 
 
 $ b $ public void save（User user）{
 // TODO自动生成的方法存根
 // getHibernateTemplate（）。save（user）; 
 this.hibernateTemplate.save（user）; 
} 
 
 public void delete（用户用户）{
 // TODO自动生成的方法存根
 this.hibernateTemplate.delete（user）; 
 
 $ b $ public User UserUserbyId（String username）{
 // TODO自动生成的方法存根
返回this.hibernateTemplate.get（User.class，username） ; 
} 
 
} 
  

这是我的stacktrace错误，当我运行程序：

  pass 
 org.springframework.orm.hibernate3.HibernateSystemException：Unknown entity：edu.acct。 tsegay.model.User;嵌套异常是org.hibernate.MappingException：未知实体：edu.acct.tsegay.model.User 
 at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException（SessionFactoryUtils.java:679）
 at org .springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException（HibernateAccessor.java:412）
 at org.springframework.orm.hibernate3.HibernateTemplate.doExecute（HibernateTemplate.java:411）
 at org.springframework.orm .hibernate3.HibernateTemplate.executeWithNativeSession（HibernateTemplate.java:374）
 at org.springframework.orm.hibernate3.HibernateTemplate.delete（HibernateTemplate.java:837）
 at org.springframework.orm.hibernate3.HibernateTemplate .delete（HibernateTemplate.java:833）
 at edu.acct.tsegay.dao.UserDao.delete（UserDao.java:34）
 at edu.acct.tsegay.business.UserBusinessObject.delete（UserBusinessObject .java：30）
 at edu.acct.tsegay.common.App.main（App.java:23）
引起：或g.hibernate.MappingException：未知实体：edu.acct.tsegay.model.User 
位于org.hibernate.impl.SessionFactoryImpl.getEntityPersister（SessionFactoryImpl.java:580）
位于org.hibernate.impl。 SessionImpl.getEntityPersister（SessionImpl.java:1365）
 at org.hibernate.event.def.DefaultDeleteEventListener.onDelete（DefaultDeleteEventListener.java:100）
 at org.hibernate.event.def.DefaultDeleteEventListener.onDelete（ 
 at org.hibernate.impl.SessionImpl.fireDelete（SessionImpl.java:793）
 at org.hibernate.impl.SessionImpl.delete（SessionImpl.java:771）$ b（org.hibernate.impl.SessionImpl.delete） $ b at org.springframework.orm.hibernate3.HibernateTemplate $ 25.doInHibernate（HibernateTemplate.java:843）
 at org.springframework.orm.hibernate3.HibernateTemplate.doExecute（HibernateTemplate.java:406）
。 .. 6 more 
  

解决方案

你的会话工厂配置。如果您使用的是 EntityManager ，您可以自动发现您的实体。

为了在hibernate中使用注释和Spring必须使用 AnnotationSessionFactoryBean ：

 < bean id = sessionFactory
 class =org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean> 
< property name =annotatedClasses> 
< list> 
< value> edu.acct.tsegay.model.User< / value> 
< / list> 
< / property> 
 .... 
< / bean> 
  

另外，你的 User 实体是一个春天的豆子。你不需要那个。 Hibernate实体应该使用 new 运算符创建。

I really want to understand what is going on with my code.

I have a standalone application which uses spring and Hibernate as JPA and I am trying to run the test using a single main Class

My main class

package edu.acct.tsegay.common;

import edu.acct.tsegay.model.User;
import edu.acct.tsegay.business.IUserBusinessObject;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {
    public static void main(String[] args) {
        try {
            ApplicationContext context = new ClassPathXmlApplicationContext(
                    "Spring3AndHibernate-servlet.xml");
            IUserBusinessObject userBusinessObject = (IUserBusinessObject) context
                    .getBean("userBusiness");

            User user = (User) context.getBean("user1");
            user.setPassword("pass");
            user.setUsername("tsegay");
            System.out.println(user.getPassword());

            userBusinessObject.delete(user);

            User user2 = new User();
            user2.setUsername("habest");
            user2.setPassword("pass1");
            System.out.println(user2.getPassword());
            /*
             * userBusinessObject.save(user2);
             * 
             * User user3 = userBusinessObject.searchUserbyId("tsegay");
             * System.out.println("Search Result: " + user3.getUsername());
             */
            System.out.println("Success");
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}

my application context is:

<beans xmlns="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <!-- data source -->
    <bean id="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/test" />
        <property name="username" value="test" />
        <property name="password" value="password" />
    </bean>

    <!-- session factory -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

        <property name="dataSource">
            <ref bean="dataSource" />

        </property>

        <property name="hibernateProperties">

            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>



    </bean>

    <!-- exposed person business object -->
    <bean id="userBusiness" class="edu.acct.tsegay.business.UserBusinessObject">
        <property name="userDao" ref="userDao" />

    </bean>
    <bean id="user1" class="edu.acct.tsegay.model.User">
        <property name="username" value="tse" />
        <property name="password" value="pass" />
    </bean>


    <!-- Data Access Object -->
    <bean id="userDao" class="edu.acct.tsegay.dao.UserDao">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>


</beans>

My User Model is:

package edu.acct.tsegay.model;

import java.io.Serializable;

import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Version;

import org.hibernate.annotations.NaturalId;

@Entity
public class User implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private String username;
    private String password;
    private Integer VERSION;

    @Version
    public Integer getVERSION() {
        return VERSION;
    }

    public void setVERSION(Integer vERSION) {
        VERSION = vERSION;
    }
    @NaturalId
    public String getUsername() {
        return username;
    }


    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

}

My DAO is:

package edu.acct.tsegay.dao;

import edu.acct.tsegay.model.User;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.HibernateTemplate;

import org.springframework.stereotype.Repository;

@Repository
public class UserDao implements IUserDao {
    private SessionFactory sessionFactory;

    private HibernateTemplate hibernateTemplate;

    public SessionFactory getSessionFactory() {
        return sessionFactory;
    }
    @Autowired
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
        this.hibernateTemplate = new HibernateTemplate(sessionFactory);
    }

    public void save(User user) {
        // TODO Auto-generated method stub
        // getHibernateTemplate().save(user);
        this.hibernateTemplate.save(user);
    }

    public void delete(User user) {
        // TODO Auto-generated method stub
        this.hibernateTemplate.delete(user);
    }

    public User searchUserbyId(String username) {
        // TODO Auto-generated method stub
        return this.hibernateTemplate.get(User.class, username);
    }

}

And this my stacktrace error when i run the program:

pass
org.springframework.orm.hibernate3.HibernateSystemException: Unknown entity: edu.acct.tsegay.model.User; nested exception is org.hibernate.MappingException: Unknown entity: edu.acct.tsegay.model.User
    at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:679)
    at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
    at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411)
    at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
    at org.springframework.orm.hibernate3.HibernateTemplate.delete(HibernateTemplate.java:837)
    at org.springframework.orm.hibernate3.HibernateTemplate.delete(HibernateTemplate.java:833)
    at edu.acct.tsegay.dao.UserDao.delete(UserDao.java:34)
    at edu.acct.tsegay.business.UserBusinessObject.delete(UserBusinessObject.java:30)
    at edu.acct.tsegay.common.App.main(App.java:23)
Caused by: org.hibernate.MappingException: Unknown entity: edu.acct.tsegay.model.User
    at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:580)
    at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1365)
    at org.hibernate.event.def.DefaultDeleteEventListener.onDelete(DefaultDeleteEventListener.java:100)
    at org.hibernate.event.def.DefaultDeleteEventListener.onDelete(DefaultDeleteEventListener.java:74)
    at org.hibernate.impl.SessionImpl.fireDelete(SessionImpl.java:793)
    at org.hibernate.impl.SessionImpl.delete(SessionImpl.java:771)
    at org.springframework.orm.hibernate3.HibernateTemplate$25.doInHibernate(HibernateTemplate.java:843)
    at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:406)
    ... 6 more

解决方案

You have to list your classes in your session factory configuration. You can have your entities auto-discovered if you are using EntityManager.

In order to use annotations with hibernate and spring, you have to use AnnotationSessionFactoryBean:

 <bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="annotatedClasses">
        <list>
            <value>edu.acct.tsegay.model.User</value>
        </list>
    </property>
    ....
 </bean>

Also, it is rather strange that your User entity is a spring bean. You don't need that. Hibernate entities are supposed to be created with the new operator.

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