初始Hibernate框架

首先我们需要先创建一个案例

     构建一个Student 的实体类

           

private String name;
   private Integer age;
   private Integer id;

       在SRC根目录下构建一个大配置

            名称是：Hibernate.cfg.xml

         

<?xml version='1.0' encoding='utf-8'?>
<!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="connection.driver_class">oracle.jdbc.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
        <property name="connection.username">sb</property>
        <property name="connection.password">sb</property>
        
        <!-- 输出所有 SQL 语句到控制台。 -->
        <property name="hibernate.show_sql">true</property>
        
        <!-- 在 log 和 console 中打印出更漂亮的 SQL。 -->
        <property name="hibernate.format_sql">true</property>
        <!-- 方言 -->
        <property name="hibernate.dialect">    org.hibernate.dialect.Oracle10gDialect</property>
    
       <!-- 关联小配置 -->
       
   </session-factory>

</hibernate-configuration>
    

       继而在组建一个名为：Student.hbm.xml 的小配置

   

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
 
 <hibernate-mapping package="cn.happy.entity">
     <class name="Student" table="Student">
         <id name="id" type="int" column="id">
         </id>
         <property name="name" type="string" column="name"/>
         <property name="age" type="int" column="age"/>
     </class>    
 </hibernate-mapping>

      编写一个测试类：

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.After;
import org.junit.Before;

import cn.happy.entity.Student;
import cn.happy.until.Hibernate_until;

public class Test {

    public static void main(String[] args) {
        //addAll();
        //delete();
        find();
    }
    
    
    public static void addAll()
    {
        Student stu=new Student();
        stu.setSid(1);
        stu.setAge(18);
        stu.setName("我是狗");
        
        //获取session对象
        Session session =  Hibernate_until.getSession();
        //开启事务
        Transaction tran = session.beginTransaction();
        //hibernate保存
        session.save(stu);
        System.out.println("成功保存！");
        tran.commit();
        Hibernate_until.closeSession();
    }
    public static void delete()
    {
        //打开session
        Session session =  Hibernate_until.getSession();
        //开始一个事务
        Transaction tx=session.beginTransaction();
        //获取部门的对象
        Student stu=(Student)session.get(Student.class, new Integer(1));
        //删除对象（持久化操作）
        if(stu!=null)
        {
          session.delete(stu);
        }
        try {
             //提交事务
            tx.commit();    
            System.out.println("删除成功");
        } catch (Exception e) {
             //回滚事务
            tx.rollback();
            System.out.println("删除回滚");
        }
        Hibernate_until.closeSession();
    }
    public static void update()
    {
        Session session =  Hibernate_until.getSession();
        //开始一个事务
        Transaction tx=session.beginTransaction();
        //获取部门的对象
        Student stu=(Student)session.get(Student.class, new Integer(1));
        //删除对象（持久化操作）
        if(stu!=null)
        {
          stu.setName("武松");
          session.update(stu);
        }
        try {
             //提交事务
            tx.commit();    
            System.out.println("删除成功");
        } catch (Exception e) {
             //回滚事务
            tx.rollback();
            System.out.println("删除回滚");
        }
        Hibernate_until.closeSession();
    }
    public static void find()
    {
            Session session =  Hibernate_until.getSession();
            //获取部门的对象
            Student stu=(Student)session.get(Student.class, new Integer(2));
            System.out.println(stu);
    }
    
    
    

}

上述就是在Hibernate 框架中，第一次实例的书写