Hibernate基于配置文件（一）快速开始-优快云博客

本文链接：https://blog.youkuaiyun.com/schy_hqh/article/details/84506585

本文详细介绍Hibernate配置及使用流程，包括配置数据库连接、定义实体类及其映射文件，并通过具体示例演示如何实现数据的增删改查操作。

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Hibernate配置文件

<!DOCTYPE hibernate-configuration PUBLIC
	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
	<session-factory>

		<property name="hibernate.connection.url">jdbc:mysql://localhost/hibernate</property>
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">root</property>
		

		<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
		
	
		<property name="show_sql">true</property>
		
		
		<property name="hibernate.hbm2ddl.auto">update</property>
		
		
		<mapping resource="org/leadfar/hibernate/model/User.hbm.xml"></mapping>
		
	</session-factory>
</hibernate-configuration>

实体类

package org.leadfar.hibernate.model;
import java.util.Date;


public class User {
	private int id;
	private String name;
	private int age;
	private boolean sex;
	private Date birthday;
	private double money;
	/**
	 * 无参构造方法
	 * getters
	 * setters
	 */

	User() {}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public boolean isSex() {
		return sex;
	}

	public void setSex(boolean sex) {
		this.sex = sex;
	}

	public Date getBirthday() {
		return birthday;
	}

	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}

	public double getMoney() {
		return money;
	}

	public void setMoney(double money) {
		this.money = money;
	}
	
	
}

实体类的映射文件

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping 
	package="org.hibernate.auction">

	<class name="org.leadfar.hibernate.model.User" table="t_user" >
		<!-- id为数据库标识，作为主键 -->
		<id name="id">
			<generator class="native"/>
		</id>
		
		<property name="name"/>
		<property name="age"/>
		<property name="sex"/>
		<property name="birthday"/>
		<property name="money"/>
		
		
	</class>
	
</hibernate-mapping>

测试

package org.leadfar.hibernate.model;

import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import junit.framework.TestCase;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class UserTest extends TestCase {
	Random r = new Random();
	///////////////////////增///////////////////
	public void testUser_01() throws Exception {
		//默认读取类路径根目录下的hibernate.cfg.xml配置文件
		Configuration cfg = new Configuration().configure();
		
		//创建SessionFactory
		SessionFactory sfactory = cfg.buildSessionFactory();
		
		//创建Hibernate Session
		Session session = sfactory.openSession();
		
		try {
			//开启事务
			session.beginTransaction();
			
			//创建实体对象
			User user = new User();
			user.setName("张三");
			user.setAge(20);
			user.setSex(false);
			user.setBirthday(new Date());
			user.setMoney(99999.99);
			
			//保存对象
			session.save(user);
			
			//提交事务
			session.getTransaction().commit();
			
		} catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		} finally {
			session.close();
		}
	}
	///////////////////////增///////////////////
	public void testUser_add() throws Exception {
		//默认读取类路径根目录下的hibernate.cfg.xml配置文件
		Configuration cfg = new Configuration().configure();
		
		//创建SessionFactory
		SessionFactory sfactory = cfg.buildSessionFactory();
		
		//创建Hibernate Session
		Session session = sfactory.openSession();
		
		try {
			//开启事务
			session.beginTransaction();
			
			for(int i=-0; i<100;i++) {
				//创建实体对象
				User user = new User();
				user.setName("用户"+i);
				user.setAge(r.nextInt(99));
				user.setSex(Math.random() > 0.5 ? true : false);
				user.setBirthday(new Date());
				user.setMoney(99999.99);
		
				//保存对象
				session.save(user);
			}
			//提交事务
			session.getTransaction().commit();
			
		} catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		} finally {
			session.close();
		}
	}
	///////////////////////查///////////////////
	public void testUser_findById() throws Exception {
		//默认读取类路径根目录下的hibernate.cfg.xml配置文件
		Configuration cfg = new Configuration().configure();
		
		//创建SessionFactory
		SessionFactory sfactory = cfg.buildSessionFactory();
		
		//创建Hibernate Session
		Session session = sfactory.openSession();
		
		try {
			//开启事务
			session.beginTransaction();
			
			User user = (User)session.get(User.class, 15);
			
			System.out.println(user.getId()+","+user.getName());
			//提交事务
			session.getTransaction().commit();
			
		} catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		} finally {
			session.close();
		}
	}
	///////////////////////查///////////////////
	public void testUser_findAll() throws Exception {
		//默认读取类路径根目录下的hibernate.cfg.xml配置文件
		Configuration cfg = new Configuration().configure();
		
		//创建SessionFactory
		SessionFactory sfactory = cfg.buildSessionFactory();
		
		//创建Hibernate Session
		Session session = sfactory.openSession();
		
		try {
			//开启事务
			session.beginTransaction();
			
			//HQL Hibernate Query Language
			List<User> list = session.createQuery("from User").list();
			for (Iterator iterator = list.iterator(); iterator.hasNext();) {
				User user = (User) iterator.next();
				System.out.println(user.getId()+","+user.getName()+","+user.getBirthday()+","+user.isSex()+","+user.getMoney());
			}
			
			//提交事务
			session.getTransaction().commit();
			
		} catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		} finally {
			session.close();
		}
	}
	///////////////////////改///////////////////
	public void testUser_update() throws Exception {
		//默认读取类路径根目录下的hibernate.cfg.xml配置文件
		Configuration cfg = new Configuration().configure();
		
		//创建SessionFactory
		SessionFactory sfactory = cfg.buildSessionFactory();
		
		//创建Hibernate Session
		Session session = sfactory.openSession();
		
		try {
			//开启事务
			session.beginTransaction();
			
			User user = (User)session.get(User.class, 101);
			user.setBirthday(null);
			user.setName("阿凡达");
			
			session.update(user);
			
			//提交事务
			session.getTransaction().commit();
			
		} catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		} finally {
			session.close();
		}
	}
	///////////////////////删///////////////////
	public void testUser_delete() throws Exception {
		//默认读取类路径根目录下的hibernate.cfg.xml配置文件
		Configuration cfg = new Configuration().configure();
		
		//创建SessionFactory
		SessionFactory sfactory = cfg.buildSessionFactory();
		
		//创建Hibernate Session
		Session session = sfactory.openSession();
		
		try {
			//开启事务
			session.beginTransaction();
			
			User user = (User)session.get(User.class, 101);
			session.delete(user);
			
			//提交事务
			session.getTransaction().commit();
			
		} catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		} finally {
			session.close();
		}
	}
}