第一次作业 orm环境构建(hibernate)及基本的demo

一、数据库

1.创建数据库hibernate01-1514010311

　 　2.创建表 customer

CREATE TABLE customer(
	id int(11) not null auto_increment  PRIMARY KEY,
  name VARCHAR(20) DEFAULT NULL COMMENT '姓名',
	age int(11)  DEFAULT NULL COMMENT '年龄',
	sex VARCHAR(2)  DEFAULT null COMMENT '性别',
	city VARCHAR(20) DEFAULT NULL COMMENT '城市'
);

二、创建项目并导入jar包

　　1.使用eclipse创建web项目，并导入hibernate所需的jar包

       

   2.创建实体类

package domain;

public class Customer {
	private Integer id;
	private String name;
	private Integer age;
	private String sex;
	private String city;
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	@Override
	public String toString() {
		return "Customer [id=" + id + ", name=" + name + ", age=" + age + ", sex=" + sex + ", city=" + city + "]";
	}

}

　　3.编写映射文件

　　在domain包下创建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">
<hibernate-mapping>
	<class name="domain.Customer" table="customer">
		<id name="id" column="id">
			<generator class="native"></generator>
		</id>
		<property name="name" column="name" type="string"></property>
		<property name="age" column="age" type="integer"></property>
		<property name="sex" column="sex" type="string"></property>
		<property name="city" column="city" type="string"></property>
	</class>
</hibernate-mapping>

　　4.编写核心配置文件hibernate.cfg.xml

　　　在src目录下创建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>
			<!-- 指定方言 -->
			<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
			 <!-- 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:///hibernate01-1514010311</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">0x3137</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>
			<mapping resource="domain/Customer.hbm.xml" />
		</session-factory>

	</hibernate-configuration>

　　5.编写测试类

　　导入JUnit4运行环境(详情百度JUnit单元测试，小生不才)

　　　选中项目点击鼠标右键->选中Build Path->选中Configure Build Path->选中如图，选择Add Library->选择JUnit->next->finish->apply

　　在test包下创建CustomerTest类

package test;

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

import domain.Customer;

public class CustomerTest {
	@Test
	public void insertTest() {
		//1.加载核心配置文件
		Configuration config = new Configuration().configure();
		//2.获取SessionFactory
		SessionFactory sessionFactory = config.buildSessionFactory();
		//3.得到一个session
		Session session = sessionFactory.openSession();
		//4.开启事务
		Transaction transaction = session.beginTransaction();
		//5.操作
		Customer customer = new Customer();
		customer.setName("三哥无邪");
		customer.setAge(21);
		customer.setSex("男");
		customer.setCity("哈尔滨");
		//5.2将数据存储在表中
		session.save(customer);
		//6.提交事务
		transaction.commit();
		//7.关闭资源
		session.close();
		sessionFactory.close();
	}
}

　　选中@Test下方法名->右键->Run As->JUnit Test

　　测试添加方法insertTest()

就此一个简单的hibernate demo编写完成。