Hibernate初认识以及HelloWorld

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory >
<!-- 配置数据库连接基本信息 -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.username">root</property>
<property name="connection.password">root123</property>
<property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>
<!-- 配置Hibernate基本信息 -->
<!-- 配置MySQL数据库方言 -->
<property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
<!-- 控制台是否打印SQL -->
<property name="show_sql">true</property>
<!-- 是否对SQL格式化 -->
<property name="format_sql">true</property>
<!-- 指定自动生成表的策略 -->
<property name="hbm2ddl.auto">update</property>
<!-- 指定关联的hbm.xml文件 -->
<mapping resource="com/elgin/hibernate/model/UserModel.hbm.xml"/>
</session-factory>
</hibernate-configuration>

package com.elgin.hibernate.model;
public class UserModel {
private int id;
private String username;
private String password;
private String phone;
private String email;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public UserModel() {
}
public UserModel(String username, String password, String phone, String email) {
super();
this.username = username;
this.password = password;
this.phone = phone;
this.email = email;
}
@Override
public String toString() {
return "UserModel [id=" + id + ", username=" + username + ", password=" + password + ", phone=" + phone
+ ", email=" + email + "]";
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 2015-7-15 23:28:28 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.elgin.hibernate.model.UserModel" table="USERMODEL">
<id name="id" type="int">
<column name="ID" />
<!-- 主键生成方式，native：使用数据库本地方式 -->
<generator class="native" />
</id>
<property name="username" type="java.lang.String">
<column name="USERNAME" />
</property>
<property name="password" type="java.lang.String">
<column name="PASSWORD" />
</property>
<property name="phone" type="java.lang.String">
<column name="PHONE" />
</property>
<property name="email" type="java.lang.String">
<column name="EMAIL" />
</property>
</class>
</hibernate-mapping>

package com.elgin.hibernate.test;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.junit.Test;

import com.elgin.hibernate.model.UserModel;

public class HibernateTest {

@Test
public void test(){

//1.创建sessionFactory对象
SessionFactory sessionFactory=null;

//a> 创建Configuraton对象：关联hibernate配置文件和对象映射信息
Configuration configuration=new Configuration().configure();
// 4.0之前这么创建
//sessionFactory=configuration.buildSessionFactory();
//b> 创建一个serviceRegistry对象：hibernate 4.x新添加对象
//   hibernate的任何配置和服务必须要在此对象中注册才能使用
ServiceRegistry serviceRegistry=
new ServiceRegistryBuilder().applySettings(configuration.getProperties())
.buildServiceRegistry();

sessionFactory=configuration.buildSessionFactory(serviceRegistry);
//2.创建一个session对象
Session session=sessionFactory.openSession();
//3.开启事务
Transaction transaction=session.beginTransaction();
//4.执行保存操作
UserModel user=new UserModel("Java", "123qwe", "13626345190", "ddddd@126.com");
session.save(user);
//5.提交事务
transaction.commit();
//6.关闭session
session.close();
//7.关闭sessionFactory
sessionFactory.close();

}
}

Hibernate:
insert
into
USERMODEL
(USERNAME, PASSWORD, PHONE, EMAIL)
values
(?, ?, ?, ?)