我是休眠的新手。当我尝试运行它时，我收到此异常“当未设置 hibernate.dialect 时连接不能为空”。我已经正确设置了方言。
这是 hibernate.cfg.xml 文件
<hibernate-configuration>
<session-factory>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mysql</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">admin</property>
<property name="hibernate.connection.pool_size">10</property>
<property name="show_sql">true</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">create</property>
<mapping class="org.siva.model.UserDetails"/>
</session-factory>
</hibernate-configuration>
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;
}
}
主要班
public class HibernateTest {
public static void main(String[] args) {
UserDetails user=new UserDetails();
user.setUserID(1);
user.setUserName("firstUser");
Configuration configuration=new Configuration();
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
Session session=sessionFactory.openSession();
session.beginTransaction();
session.save(user);
session.getTransaction().commit();
}
}