ORM既然是实体与关系数据库的映射，那就需要建立实体和关系数据库之间的基础数据，也可以称为元数据。简单的说就是表示类与表、列与属性（get、set方法）等等之间对应关系的数据。
Customer.hbm.xml
<?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"><!-- 配置表与实体对象之间的联系 --><!-- package属性：填写一个包名在元素内部凡是需要书写完整类名的属性，可以直接写类名 --><hibernate-mapping package="com.glut.domain"> ???<!-- ????????class元素：配置实体与表的对应关系 ???????????name：完整类名 ???????????column：数据库表明 ????--> ???<class name="Customer" table="cst_customer"> ???????<!-- id：配置主键映射的属性 ???????????????name：填写主键对应属性名 ???????????????column：填写表中的主键列名 ????????--> ???????<id name="cust_id" column="cust_id"> ???????????<!-- generator：主键生成策略 --> ???????????<generator class="native"></generator> ???????</id> ???????????????<!-- property元素：除id之外iadeputong属性映射 ???????????????name:填写属性名 ???????????????column：填写列名 ???????????????type(可选)：填写列(属性)的类型，hibernate会自动检测实体的属性类型 ???????????????每个类型有三种填法：java类型|hibernate类型|数据库类型 ???????????????not-null(可选)： 配置该属性是否不能为空，默认值：false ???????????????length(可选)：配置数据库中列的长度，默认值：当前数据库类型最大长度 ????????--> ???????<property name="cust_name" column="cust_name" ></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>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> ???????<!-- ????????????#hibernate.dialect org.hibernate.dialect.MySQLDialect ???????????#hibernate.dialect org.hibernate.dialect.MySQLInnoDBDialect ???????????#hibernate.dialect org.hibernate.dialect.MySQLMyISAMDialect ???????????#hibernate.connection.driver_class com.mysql.jdbc.Driver ???????????#hibernate.connection.url jdbc:mysql:///test ???????????#hibernate.connection.username gavin ???????????#hibernate.connection.password ????????--> ????????<!-- 数据库驱动 --> ???????<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> ???????????????<!-- 数据库url --> ???????<property name="hibernate.connection.url">jdbc:mysql:///crm</property> ???????????????<!-- 数据库连接用户名 --> ???????<property name="hibernate.connection.username">root</property> ???????????????<!-- 数据库连接密码 --> ???????<property name="hibernate.connection.password">123456</property> ???????????????<!-- 数据库方言 ???????????DDL: 定义语言 ???????????DML：操纵语言 ?增删改查 ???????????DCL：控制语言 ?事务 权限 ???????????????????????注意：MYSQL选择方言的时候选择最短的方言 ????????--> ???????<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> ???????????????<!-- ???????????d://hibernate-day01\resource\hibernate-release-5.0.7.Final\project\etc\PROPERTIES ???????????关键字：show ???????????#hibernate.show_sql true ????HBM生成sql并在控制台显示sql语句 ???????????#hibernate.format_sql true ??sql格式化显示 ????????--> ???????<property name="hibernate.show_sql">true</property> ???????<property name="hibernate.format_sql">true</property> ???????????????????????<!-- ????????????关键字：hbm2 ???????????## auto schema export ?自动导出表结构 ?自动建表 ???????????#hibernate.hbm2ddl.auto create-drop ?自动建表，每次框架运行结束都会将所有表删除.(开发环境中测试使用) ???????????#hibernate.hbm2ddl.auto create ?自动建表，每次框架运行都会创建新的表，一千表将会被覆盖，表数据会丢失(开发环境中测试使用) ???????????#hibernate.hbm2ddl.auto update(推荐使用) ?自动生成表，如果已经存在不会在生成。如果表有改动，自动更新表(不会删除任何数据) ???????????#hibernate.hbm2ddl.auto validate ????????校验,不自动生成表，每次启动会校验数据库中表是否正确。校验失败 ????????--> ???????<property name="hibernate.hbm2ddl.auto">update</property> ???????????????????????<!-- 引入orm元数据 ???????????路径书写：填写src下的路径 ????????--> ???????<mapping resource="com/glut/domain/Customer.hbm.xml"/> ???</session-factory></hibernate-configuration>实体对象
package com.glut.domain;/** * Customer表对象 * @author legend * */public class Customer { ???private Long cust_id; ???private String cust_name; ???private String cust_source; ???private String cust_industry; ???private String cust_level; ???private String cust_linkman; ???private String cust_phone; ???private String cust_mobile; ???public Long getCust_id() { ???????return cust_id; ???} ???public void setCust_id(Long cust_id) { ???????this.cust_id = cust_id; ???} ???public String getCust_name() { ???????return cust_name; ???} ???public void setCust_name(String cust_name) { ???????this.cust_name = cust_name; ???} ???public String getCust_source() { ???????return cust_source; ???} ???public void setCust_source(String cust_source) { ???????this.cust_source = cust_source; ???} ???public String getCust_industry() { ???????return cust_industry; ???} ???public void setCust_industry(String cust_industry) { ???????this.cust_industry = cust_industry; ???} ???public String getCust_level() { ???????return cust_level; ???} ???public void setCust_level(String cust_level) { ???????this.cust_level = cust_level; ???} ???public String getCust_linkman() { ???????return cust_linkman; ???} ???public void setCust_linkman(String cust_linkman) { ???????this.cust_linkman = cust_linkman; ???} ???public String getCust_phone() { ???????return cust_phone; ???} ???public void setCust_phone(String cust_phone) { ???????this.cust_phone = cust_phone; ???} ???public String getCust_mobile() { ???????return cust_mobile; ???} ???public void setCust_mobile(String cust_mobile) { ???????this.cust_mobile = cust_mobile; ???} ???@Override ???public String toString() { ???????return "Customer [cust_id=" + cust_id + ", cust_name=" + cust_name + ", cust_source=" + cust_source ???????????????+ ", cust_industry=" + cust_industry + ", cust_level=" + cust_level + ", cust_linkman=" + cust_linkman ???????????????+ ", cust_phone=" + cust_phone + ", cust_mobile=" + cust_mobile + "]"; ???} ???public Customer(Long cust_id, String cust_name, String cust_source, String cust_industry, String cust_level, ???????????String cust_linkman, String cust_phone, String cust_mobile) { ???????super(); ???????this.cust_id = cust_id; ???????this.cust_name = cust_name; ???????this.cust_source = cust_source; ???????this.cust_industry = cust_industry; ???????this.cust_level = cust_level; ???????this.cust_linkman = cust_linkman; ???????this.cust_phone = cust_phone; ???????this.cust_mobile = cust_mobile; ???} ???public Customer() { ???????super(); ???????// TODO Auto-generated constructor stub ???} ???}Hibernate测试
package com.glut.test;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.junit.jupiter.api.Test;import com.glut.domain.Customer;/** * 测试Hibernate框架 * @author legend * */public class hbmTest { ???@Test ???//保存客户 ???public void fun1() { ???????Configuration conf = new Configuration().configure(); ???????????????SessionFactory sessionFactory = conf.buildSessionFactory(); ???????????????Session session = sessionFactory.openSession(); ???????????????Transaction tx = session.beginTransaction(); ???????????????//-------------------------------- ???????????????//创建对象 ???????Customer c = new Customer(); ???????c.setCust_name("腾讯公司");//执行保存s ???????????????session.save(c); ???????????????//------------------------------- ???????????????tx.commit(); ???????session.close(); ???????sessionFactory.close(); ???}}2018.10.6 Hibernate配置文件详解-------ORM元数据配置 ?&&& hibernate主配置文件
原文地址：https://www.cnblogs.com/qichunlin/p/9744278.html