我刚开始学习Hibernate，我的简单配置让我尝试保存唯一的类时出现了错误：“关系‘userdetails’不存在”。
我的hibernate.gfg.xml文件：
<!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>
<property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
<property name="hibernate.connection.username">postgres</property>
<property name="hibernate.connection.password">XXXX</property>
<property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/hibernatedb</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">
org.hibernate.dialect.PostgreSQLDialect
</property>
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<property name="show_sql">true</property>
<property name="hdm2ddl.auto">create</property>
<mapping class="hibernate.project.UserDetails"/>
</session-factory>
</hibernate-configuration>
我唯一的模型类:
@Entity
public class UserDetails {
@Id
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;
}
我的主要程序：
public static void main(String[] args) {
UserDetails user = new UserDetails();
user.setUserId(1);
user.setUserName("First User");
Configuration config = new Configuration().configure();
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(config.getProperties()).build();
SessionFactory sessionFactory = config.buildSessionFactory(serviceRegistry);
Session session=sessionFactory.openSession();
session.beginTransaction();
session.save(user);
session.getTransaction().commit();
}
有什么想法吗？我找到了类似的问题，但没有帮助。谢谢！