hibernateのデモのための簡単なプログラムを書くだけです。しかし、私はマッピングの例外を持っています。Hibernateでのマッピングの例外 - 不明なエンティティ
hibernate.cfg.xmlのは、SRC/hibernateProject.com.himal.hibernatePractise.dtoの下にsrcディレクトリの下に
<?xml version='1.0' encoding='utf-8'?>
<!--
~ Hibernate, Relational Persistence for Idiomatic Java
~
~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
-->
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/hibernatedb</property>
<property name="connection.username">root</property>
<property name="connection.password">1234</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.internal.NoCachingRegionFactory</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>
<!-- Names the annotated entity class -->
<mapping class="hibernateProject.com.himal.hibernate.HibernateTest"/>
</session-factory>
</hibernate-configuration>
ですが、私はUserDetailsクラスを作成します。
package hibernateProject.com.himal.hibernatePractise.dto;
import javax.persistence.Entity;
import javax.persistence.Id;
/**
* Created by Himal Acharya on 2016-09-01.
*/
@Entity
public class UserDetails {
@Id
//for primary key
private int userId;
private String userName;
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
そして、私のテストクラスは
package hibernateProject.com.himal.hibernate;
import hibernateProject.com.himal.hibernatePractise.dto.UserDetails;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
/**
* Created by Himal Acharya on 2016-09-01.
*/
public class HibernateTest {
public static void main(String[] args) {
//Initiate object of userDetails
UserDetails user=new UserDetails();
//setting value
user.setUserId(1);
user.setUserName("Himal");
//get the configuration
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
Session session=sessionFactory.openSession();
session.beginTransaction();
session.save(user);
//Ending Transcation
session.getTransaction().commit();
}
}
あるしかし、私は次のエラーました:cosoleに述べたように
log4j:WARN No appenders could be found for logger (org.jboss.logging).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" org.hibernate.MappingException: Unknown entity: hibernateProject.com.himal.hibernatePractise.dto.UserDetails
エラーがhibernateProject.com.himal.hibernate.HibernateTest.mainであるがin line session.save(user);あなたが休止状態@org.hibernate.annotations.Entity
はとてもこの
import org.hibernate.*;
によって、あなたの休止状態-config.xmlにJPA
下にあるこの
import javax.persistence.Entity;
import javax.persistence.Id;
に代わるものではありませJPAエンティティを使用している
ことができます を に変更してみてください –
ええ.Chnaging this worked –