Hibernate1:hibernate配置文件
1.数据库设计
2.创建项目,并导入相应的jar包
3.配置全局配置文件hibernate.cfg.xml(要导入dtd)
<?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>
<!-- 数据库驱动 -->
<property name="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</property>
<!-- 数据库url -->
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/ssh?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC</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">root</property>
<!-- 数据库方言(不同的数据库中,sql语法略有区别. 指定方言可以让hibernate框架在生成sql语句时.针对数据库的方言生成) -->
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- 将hibernate生成的sql语句打印到控制台 -->
<property name="hibernate.show_sql">true</property>
<!-- 将hibernate生成的sql语句格式化(语法缩进) -->
<property name="hibernate.format_sql">true</property>
<!--
## auto schema export 自动导出表结构. 自动建表
#hibernate.hbm2ddl.auto create 自动建表.每次框架运行都会创建新的表.以前表将会被覆盖,表数据会丢失.(开发环境中测试使用)
#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 update(推荐使用) 自动生成表.如果已经存在不会再生成.如果表有变动.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>
<mapping resource="com/pojo/Customer.hbm.xml"/>
</session-factory>
</hibernate-configuration>
4.创建实体类Customer.java
package com.pojo;
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;
}
}
5.创建配置文件Customer.hbm.xml
<?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">
<!-- 配置表与实体对象的关系 -->
<!-- package属性:填写一个包名,但凡元素内部属性要求填完整类路径时可以简写。如com.pojo.Customer可以简写成Customer -->
<hibernate-mapping package="com.pojo">
<!--
class标签:配置实体与表的对应关系
name属性:完整类名(com.pojo.Customer),简写成了Customer
table属性:数据库表名
-->
<class name="Customer" table="cst_customer">
<!--
id标签:配置主键映射的标签
name属性:主键对应实体类属性名
column属性(可选):列名,默认使用属性名
type属性(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
length(可选):配置数据库列的长度,默认为数据库类型列名的最大长度
not-null(可选):配置该属性(列)是否不能为空. 默认值:false
-->
<id name="cust_id" column="cust_id">
<!-- generator:主键生成策略 -->
<generator class="native"></generator>
</id>
<!--
property标签:除id之外的普通属性映射标签
name属性: 填写属性名
column属性(可选): 填写列名
type属性(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属性(可选):配置该属性(列)是否不能为空. 默认值:false
length属性(可选):配置数据库中列的长度. 默认值:使用数据库类型的最大长度
-->
<property name="cust_name" column="cust_name">
<!-- <column name="cust_name" sql-type="varchar"></column> -->
</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>
6.测试类
package com.test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import com.pojo.Customer;
public class Demo {
public static void main(String[] args) {
Configuration conf = new Configuration().configure();
SessionFactory sessionFactory = conf.buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction transaction = session.beginTransaction();
Customer customer = new Customer();
customer.setCust_name("百度公司");
session.save(customer);
transaction.commit();
session.close();
sessionFactory.close();
}
}