Hibernate（基础1）

悠悠 2022-06-12 07:37 215阅读 0赞

**一.hibernate框架职责**  
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**二.hibernate是orm框架**  
对象关系映射（英语：(Object Relational Mapping，简称ORM，或O/RM，或O/R mapping）  
![这里写图片描述][SouthEast 1]  
orm分为4级：  
hibernate属于4级:完全面向对象操作数据库  
mybatis属于2级  
dbutils属于1级  
三.hibernate框架搭建  
1.导包  
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驱动包  
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2.创建数据库,准备表,实体  
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3.书写orm元数据(对象与表的映射配置文件)  
实体

public class Customer {
        private Long cust_id;
        private String cust_name;
        private Long cust_user_id;
        private Long cust_create_id;
        private String cust_source;
        private String cust_industry;
        private String cust_level;
        private String cust_linkman;
        private String cust_phone;
        private String cust_mobile;
    }

并生成get和set方法

导入约束  
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orm元数据Customer.hbm.xml文件书写

<?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>
        <class name="hibernate.domain.Customer" table="cst_customer">
            <id name="" column=""></id>
            <property name="cust_id" column="cust_id"></property>
            <property name="cust_name" column="cust_name"></property>
            <property name="cust_user_id" column="cust_user_id"></property>
            <property name="cust_create_id" column="cust_create_id"></property>
            <property name="cust_source" column="cust_source"></property>
            <property name="cust_industry" column="cust_industry"></property>
            <property name="cust_level" column="cust_level"></property>
            <property name="cust_linkman" column="cust_linkman"></property>
            <property name="cust_phone" column="cust_phone"></property>
            <property name="cust_mobile" column="cust_mobile"></property>
        </class>
    </hibernate-mapping>

4.书写主配置文件  
约束同上导入，约束文件为hibernate-configuration-3.0.dtd

5.书写代码测试

[SouthEast]: /images/20220612/7c926b4a0c5f4285b14270d998c676a3.png
[SouthEast 1]: /images/20220612/08602e953d3e46e9b3881278af0a82bd.png
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[SouthEast 5]: /images/20220612/f4182d6f1a294dc2b9fe0cabd89c57a4.png
[SouthEast 6]: /images/20220612/2062c55e4e504c7e98198a909ff403e6.png