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();
}
}
原文地址：https://www.cnblogs.com/qichunlin/p/9744278.html
时间： 2024-10-11 00:02:28