Question

我为SessionFactory创建了一个单独的实用程序类，下面是我的代码：

        package com.Hibernate.Util;

        import org.hibernate.SessionFactory;
        import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
        import org.hibernate.cfg.Configuration;
        import org.hibernate.service.ServiceRegistry;

        public class HibernateUtil {
            private static SessionFactory sessionFactory;
            private static SessionFactory buildSessionFactory() {
                try {
                    Configuration configuration = new Configuration();
                    configuration.configure("hibernate.cfg.xml");
                    System.out.println("Hibernate configuration loading......");
                    ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                            .applySettings(configuration.getProperties()).build();
                    System.out.println("Hibernate serviceRegistry created.....");
                    SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
                    return sessionFactory;
                } catch (Throwable ex) {
                    System.out.println("SessionFactory creation failure.....");
                    ex.printStackTrace();
                    throw new ExceptionInInitializerError(ex);
                }
            }
            public static SessionFactory getSessionFactory1() {
                if (sessionFactory == null)
                    sessionFactory = buildSessionFactory();
                return sessionFactory;
            }
        }

Hibernate配置文件 hibernate.cfg.xml文件：

    <?xml version="1.0" encoding="utf-8"?>
     <!DOCTYPE hibernate-configuration SYSTEM "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> 
     <hibernate-configuration>
      <session-factory> 
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>    
            <property name="hibernate.connection.username">root</property>    
            <property name="hibernate.connection.password">root.123</property>    
            <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/Hibernate</property>    
            <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>  
            <property name="hibernate.current_session_context_class">thread</property>
            <property name="hibernate.hbm2ddl.auto">create</property>   
            <property name="hibernate.show_sql">true</property>    
            <mapping class="com.Hibernate.Model.Employee"></mapping>
            <mapping class="com.Hibernate.Model.Address"></mapping>
       </session-factory> 
     </hibernate-configuration>

下面的类调用SessionFactory方法buildSessionFactory 的 HQLExample.java ：

package com.Hibernate.Main;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

import com.Hibernate.Model.Employee;
import com.Hibernate.Util.HibernateUtil;

public class HQLExample {

    public static void main(String[] args) {
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory1();
        System.out.println(sessionFactory);
        Session session = sessionFactory.getCurrentSession();
    }
}

代码正在执行但未创建表。有人可以告诉我代码会出现什么问题???

Answer 1

请使用HQLExample.java中的以下代码库更新主要方法：

public static void main(String[] args) {
        SessionFactory sessionFactory = HibernateUtil.getSessionFactory1();
        System.out.println(sessionFactory);
        Session session = sessionFactory.getCurrentSession();
   try {
            Transaction transaction = session.beginTransaction();
            transaction.commit();
            System.out.println("Database tables created successfully");

        } catch (Exception e) {
            System.out.println("Error to creating database tables for hibernate file : "+ e.getMessage());
        }finally {
           sessionFactory.close();
           session.close();
        }
    }

数据库表没有创建

1 个答案: