Hibernate-基础入门案例，增删改查

Posted 2020-10-03 Archibald Witwicky

项目结构：

 

数据库：

/*
SQLyog Ultimate v12.09 (64 bit)
mysql - 5.5.53 : Database - hibernate01
*********************************************************************
*/


/*!40101 SET NAMES utf8 */;

/*!40101 SET SQL_MODE=\'\'*/;

/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE=\'NO_AUTO_VALUE_ON_ZERO\' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
CREATE DATABASE /*!32312 IF NOT EXISTS*/`hibernate01` /*!40100 DEFAULT CHARACTER SET utf8 */;

USE `hibernate01`;

/*Table structure for table `customer` */

DROP TABLE IF EXISTS `customer`;

CREATE TABLE `customer` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(25) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;

/*Data for the table `customer` */

insert  into `customer`(`id`,`name`,`age`) values (1,\'张三\',20),(2,\'王五\',22),(3,\'赵六\',29);

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

 

所使用的jar包：

1、导入hibernate核心必须包（\\lib\\required）

2、导入mysql驱动包

3、导入log4j日志包

 

项目代码：

com.gordon.domain:

--Customer.java

package com.gordon.domain;

public class Customer {

	private Integer id;
	private String name;
	private Integer age;

	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;
	}

	@Override
	public String toString() {
		return "Customer [id=" + id + ", name=" + name + ", age=" + age + ", getId()=" + getId() + ", getName()="
				+ getName() + ", getAge()=" + getAge() + ", getClass()=" + getClass() + ", hashCode()=" + hashCode()
				+ ", toString()=" + super.toString() + "]";
	}
}

 

--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="com.gordon.domain.Customer" table="customer">
		<id name="id" column="id">
			<generator class="native"></generator>
		</id>
		<property name="name" column="name" />
		<property name="age" column="age" />
	</class>
</hibernate-mapping>

 

 

*Hibernate的删除/更新，要先根据id或者相应字段查询出数据，才能通过update/delete方法更新或者移除数据，自己构造对象进项操作则会报错。

com.gordon.test:*测试时需导入jUnit4测试包，然后可以在方法上双击选中方法名，右键 runas 运行在junit。

--Testhibernate.java

package com.gordon.test;

import java.util.List;

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

import com.gordon.domain.Customer;
import com.gordon.utils.HibernateUtil;

public class TestHibernate {

	/**
	 * 存储一条数据
	 */
	@Test
	public void testSave() {
		Configuration configuration = new Configuration().configure();
		SessionFactory sessionFactory = configuration.buildSessionFactory();
		Session session = sessionFactory.openSession();
		Transaction tr = session.beginTransaction();

		Customer customer = new Customer();
		customer.setName("测试");
		customer.setAge(22);

		try {
			session.save(customer);
			tr.commit();
		} catch (Exception e) {
			tr.rollback();
			e.printStackTrace();
		}

		session.close();
	}

	/**
	 * 删除一条数据
	 */
	@Test
	public void testDelete() {
		Configuration configuration = new Configuration().configure();
		SessionFactory sessionFactory = configuration.buildSessionFactory();
		Session session = sessionFactory.openSession();
		Transaction tr = session.beginTransaction();

		Customer customer = null;

		try {

			customer = session.get(Customer.class, 4);

			session.delete(customer);

			tr.commit();
		} catch (Exception e) {
			tr.rollback();
			e.printStackTrace();
		}

		session.close();
	}

	/**
	 * 修改一条数据
	 */
	@Test
	public void testUpdate() {
		Configuration configuration = new Configuration().configure();
		SessionFactory sessionFactory = configuration.buildSessionFactory();
		Session session = sessionFactory.openSession();
		Transaction tr = session.beginTransaction();

		Customer customer = null;

		try {

			customer = session.get(Customer.class, 1);
			customer.setName("jack");

			session.update(customer);

			tr.commit();
		} catch (Exception e) {
			tr.rollback();
			e.printStackTrace();
		}

		session.close();
	}

	/**
	 * 获取多条数据，查询可以不使用事务
	 */
	@SuppressWarnings("unchecked")
	@Test
	public void testGetAll() {
		Session session = HibernateUtil.getSession();

		List<Customer> customers = null;

		try {

			Query query = session.createQuery("from Customer");
			customers = query.list();

		} catch (Exception e) {
			e.printStackTrace();
		}

		session.close();

		for (Customer customer : customers) {
			System.out.println(customer);
		}
	}

	/**
	 * 获取一条数据，查询可以不使用事务
	 */
	@Test
	public void testGet() {
		Session session = HibernateUtil.getSession();

		Customer customer = null;

		try {

			customer = session.get(Customer.class, 1);

		} catch (Exception e) {
			e.printStackTrace();
		}

		session.close();

		System.out.println(customer);
	}
}

 

 

com.gordon.utils:

--Hibernate.Util.java

package com.gordon.utils;

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

public class HibernateUtil {
	private static final Configuration CONFIGURATION;
	private static final SessionFactory SESSIONFACTORY;

	static {
		CONFIGURATION = new Configuration().configure();
		SESSIONFACTORY = CONFIGURATION.buildSessionFactory();
	};

	public static Session getSession() {
		return SESSIONFACTORY.openSession();
	}
}

 

 

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>
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate01</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">root</property>
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		
		<mapping resource="com/gordon/domain/Customer.hbm.xml"/>
	</session-factory>
</hibernate-configuration>