PinkGuy / Hibernate搭建步骤

Created 2019-11-29 Modifyd 2019-11-29

1.导入相关的jar包

![jar]()

2.配置hibernate主配置

• 创建名字默认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>
      <!-- 1.配置数据库信息 -->
      <!--必须有的 -->
      <property name="connection.url">
          jdbc:oracle:thin:@192.168.206.1:1521:orcl
      </property>
      <property name="connection.driver_class">
          oracle.jdbc.driver.OracleDriver
      </property>
          
      <property name="connection.username">scott</property><!-- 用户 -->
      <property name="connection.password">333</property><!-- 密码 -->
  
      <property name="dialect">
          org.hibernate.dialect.ProgressDialect
      </property>
          
      <!-- 辅助文件 -->
      <property name="show_sql">true</property>   <!-- 输出底层sql语句 -->
  		<property name="format_sql">true</property> <!-- 输出底层sql语句格式 -->
          
  		<!-- 添加映射文件 -->
      <mapping resource="dept.hbm.xml"/>
  </session-factory>
  </hibernate-configuration>
  

3.测试配置是否正常

• 工具类

  public class Hibernate {
  static SessionFactory factory;
  static Session session = null;
  static {
      Configuration cfg = new Configuration().configure();
      factory = cfg.buildSessionFactory();
  }
  
  public  static  Session getSession(){
      if (session == null) session =factory.openSession();
      return  session;
  }
  }
  

• 测试类

  public class TestHb {
  public static void main(String[] args) {
      Session session  = Hibernate.getSession();
      System.out.println(session);
  }
  }
  

4.创建实体类映射文件

• 配置实体类与数据库表的一一对应关系,映射关系
• 建议命名 .hbm.xml;

• 建议column里用大写

  <?xml version="1.0" encoding="UTF-8"?>
  <!DOCTYPE hibernate-mapping PUBLIC
      "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
      "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
  <hibernate-mapping>
  <class name="com.hb.entity.Dept" >  <!-- 实体类的全类名 -->
      <id name="deptno" column="DEPTNO">  <!-- 设置主键 -->
          <generator class="assigned"></generator> <!-- 手动增长 -->
      </id>
      <property name="dname" column="DNAME"/>
      <property name="loc" column="LOC"/>
  </class>
  </hibernate-mapping>
  

5.获取session使用hibernate

 Transaction tx = session.beginTransaction(); //获取提交事务对象
 Session session = Hibernate.getSession();
        Dept dept = new Dept(50,"阿里","杭州");
   session.save(dept);
  tx.commit();
  System.out.println("数据添加成功");