我正在尝试使用hibernate来使用sqlite。然而,我在配置sqlite数据库路径时遇到了困难。目前,我的hibernate.cfg.xml
是这样的:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.url">jdbc:sqlite:test.db</property>
<property name="connection.driver_class">org.sqlite.JDBC</property>
<property name="hibernate.dialect">org.hibernate.dialect.SQLiteDialect</property>
<property name="current_session_context_class">thread</property>
<mapping class="com.test.entity.Category"/>
<!-- DB schema will be updated if needed -->
<!-- <property name="hbm2ddl.auto">update</property> -->
</session-factory>
</hibernate-configuration>
我正在使用IntelliJ。我在resources&在工件中,我可以在classes包中看到它。然而,每次我得到这个错误:
org.hibernate.hql.internal.ast.QuerySyntaxException: Category is not mapped [select id from Category]
类别.java
@Entity
@Table(name = "category", schema = "", catalog = "")
public class Category {
private String id;
private String name;
private String imageUrl;
@Id
@Column(name = "id")
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
@Basic
@Column(name = "name")
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Basic
@Column(name = "imageUrl")
public String getImageUrl() {
return imageUrl;
}
}
Hibernate Util.java
public class HibernateUtil {
private static SessionFactory sessionFactory;
private static SessionFactory buildSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(
configuration.getProperties()).build();
return configuration.buildSessionFactory(serviceRegistry);
} catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
if(sessionFactory == null){
sessionFactory = buildSessionFactory();
}
return sessionFactory;
}
public static void shutdown() {
getSessionFactory().close();
}
}
我使用的是Hibernate 5.1.0版
我已经检查了sessionFactory.getAllClassMetadata()
——它显示没有映射类。如有任何帮助,我们将不胜感激。
您使用了不正确的Hibernate 5配置方式。
Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(
configuration.getProperties()).build();
return configuration.buildSessionFactory(serviceRegistry);
在Hibernate 5中,当您执行configuration.configure("hibernate.cfg.xml")
时,一切都配置正确。但当您执行configuration.buildSessionFactory(serviceRegistry)
时,所有配置都将丢失。
只做
return new Configuration().configure().buildSessionFactory();
参考
Hibernate 5:-org.Hibernate.MappingException:未知实体