Hibernate入门

如何搭建Hibernat

1.下载jar包

2.部署jar文件

3.创建配置文件

4.创建持久化类和映射文件

resource.xml

hibernate.cfg.xml属性

头文件

<?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">





连接的四大属性
connection.url:表示数据库url
connection.usrname:用户名 (oracle)
connection.password:oracle密码

<?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">
<!--根节点-->
<hibernate-configuration>
    <session-factory>
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
        <property name="connection.username">happy1</property>
        <property name="connection.password">happy1</property>
        <!-- SQL dialect SQL方言 -->
        <property name="dialect">  org.hibernate.dialect.Oracle10gDialect</property>
        <!-- Enable Hibernate's automatic session context management session和当前线程绑定-->
  <!--        <property name="current_session_context_class">thread</property>-->
        <!--打印sql 控制台-->
        <property name="show_sql">true</property>
        <!--自动构建表结构   create 先delete表结构 再创建，update直接更新表结构-->
        <property name="hbm2ddl.auto">update</property>
<!--关联entity--><!--找小配置-->
        <mapping resource="cn/happy/entity/Dog.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

写完了，就单测一把看看能不能在oracle数据库里家个Dog表

package cn.text.java.cn.happy.test;

import cn.happy.entity.Dog;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.jcp.xml.dsig.internal.dom.DOMBase64Transform;
import org.junit.Test;

/**
 * Created by Happy on 2017-09-18.
 * 勿忘国耻  为中华之崛起而读书
 */
public class Test20170918 {


    @Test
    public void test02(){
        //Configuration
        Configuration cfg=new Configuration().configure();//1[计算机] 配置 
        //session对象
        SessionFactory factory=cfg.buildSessionFactory(); //2 创建session对象
        Session session = factory.openSession(); //3

        Dog dog=session.get(Dog.class,1);
        System.out.println(dog.getDogname());
        session.close();
        /*
        * 所有增删改操作
        * */
    }

    @Test
    public void test01(){
        //Configuration
        Configuration cfg=new Configuration().configure();//1
        //session对象
        SessionFactory factory=cfg.buildSessionFactory(); //2
        Session session = factory.openSession(); //3
        Transaction tx = session.beginTransaction();//4
        /*
        * 所有增删改操作
        * */
        Dog dog=new Dog();
        dog.setDogname("贝贝");
        dog.setDogage(20);
        session.save(dog);
        tx.commit();//5
        System.out.println("add ok!");
        session.close(); //☆⌒(＞。≪)6
    }
}