Hibernate框架搭建

最新推荐文章于 2020-08-29 22:15:55 发布

ClarkKentYang

最新推荐文章于 2020-08-29 22:15:55 发布

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分类专栏： Hibernate

本文链接：https://blog.csdn.net/ClarkKentYang/article/details/72453783

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本文详细介绍如何使用Hibernate框架进行数据库操作，包括导入jar包、配置hibernate.cfg.xml文件、编写实体类及其XML映射文件，并通过示例展示了如何保存数据。

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1.导入相关jar包

2.编写Hibernate的配置文件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>
	
		<!-- 
		#hibernate.dialect org.hibernate.dialect.MySQLDialect
		#hibernate.dialect org.hibernate.dialect.MySQLInnoDBDialect
		#hibernate.dialect org.hibernate.dialect.MySQLMyISAMDialect
		#hibernate.connection.driver_class com.mysql.jdbc.Driver
		#hibernate.connection.url jdbc:mysql:///test
		#hibernate.connection.username gavin
		#hibernate.connection.password
		 -->
		 <!-- 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:///changejob</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.
			sql99标准: DDL 定义语言  库表的增删改查
					  DCL 控制语言  事务 权限
					  DML 操纵语言  增删改查
			注意: MYSQL在选择方言时,请选择最短的方言.
		 -->
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		
		
		<!-- #hibernate.show_sql true 
			 #hibernate.format_sql true
		-->
		<!-- 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>
		<!-- 引入orm元数据
			路径书写: 填写src下的路径
		 -->
		<mapping resource="com/milan/hibernate/domain/Customer.hbm.xml" />
		
	</session-factory>
</hibernate-configuration>

3.编写实体类

package com.milan.hibernate.domain;

public class Customer {
	
	/*
	 * CREATE TABLE `cst_customer` (
	  `cust_id` BIGINT(32) NOT NULL AUTO_INCREMENT COMMENT '客户编号(主键)',
	  `cust_name` VARCHAR(32) NOT NULL COMMENT '客户名称(公司名称)',
	  `cust_source` VARCHAR(32) DEFAULT NULL COMMENT '客户信息来源',
	  `cust_industry` VARCHAR(32) DEFAULT NULL COMMENT '客户所属行业',
	  `cust_level` VARCHAR(32) DEFAULT NULL COMMENT '客户级别',
	  `cust_linkman` VARCHAR(64) DEFAULT NULL COMMENT '联系人',
	  `cust_phone` VARCHAR(64) DEFAULT NULL COMMENT '固定电话',
	  `cust_mobile` VARCHAR(16) DEFAULT NULL COMMENT '移动电话',
	  PRIMARY KEY (`cust_id`)
	) ENGINE=INNODB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
	 */
	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;
	}
	@Override
	public String toString() {
		return "Customer [cust_id=" + cust_id + ", cust_name=" + cust_name + "]";
	}
}

4.编写实体类对应的xml文件

<?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.在元素内部凡是需要书写完整类名的属性,可以直接写简答类名了. -->
<hibernate-mapping package="com.milan.hibernate.domain" >
	<!-- 
		class元素: 配置实体与表的对应关系的
			name: 完整类名
			table:数据库表名
	 -->
	<class name="Customer" table="cst_customer" >
		<!-- id元素:配置主键映射的属性
				name: 填写主键对应属性名
				column(可选): 填写表中的主键列名.默认值:列名会默认使用属性名
				type(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(可选):配置该属性(列)是否不能为空. 默认值:false
				length(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
		 -->
		<id name="cust_id"  >
			<!-- generator:主键生成策略 -->
			<generator class="native"></generator>
		</id>
		<!-- property元素:除id之外的普通属性映射
				name: 填写属性名
				column(可选): 填写列名
				type(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(可选):配置该属性(列)是否不能为空. 默认值:false
				length(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>

5.测试

package com.milan.hibernate.test;

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

import com.milan.hibernate.domain.Customer;

public class Demo {
	
	@Test
	public void function1() {
		Configuration configuration = new Configuration().configure();
		SessionFactory sessionFactory = configuration.buildSessionFactory();
		Session session = sessionFactory.openSession();
		Transaction transaction = session.beginTransaction();
		
		Customer customer = new Customer();
		customer.setCust_name("helloworld");
		session.save(customer);
		
		transaction.commit();
		session.close();
		sessionFactory.close();
	}
}

6.控制台输出如下：

五月 17, 2017 10:25:54 下午 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.0.7.Final}
五月 17, 2017 10:25:54 下午 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
五月 17, 2017 10:25:54 下午 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
五月 17, 2017 10:25:54 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
五月 17, 2017 10:25:55 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
五月 17, 2017 10:25:55 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql:///changejob]
五月 17, 2017 10:25:55 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {user=root, password=****}
五月 17, 2017 10:25:55 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
五月 17, 2017 10:25:55 下午 org.hibernate.engine.jdbc.connections.internal.PooledConnections <init>
INFO: HHH000115: Hibernate connection pool size: 20 (min=1)
五月 17, 2017 10:25:55 下午 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQLDialect
五月 17, 2017 10:25:55 下午 org.hibernate.engine.jdbc.env.internal.LobCreatorBuilderImpl useContextualLobCreation
INFO: HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4
五月 17, 2017 10:25:56 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute
INFO: HHH000228: Running hbm2ddl schema update
Hibernate:
insert
into
cst_customer
(cust_name, cust_source, cust_industry, cust_level, cust_linkman, cust_phone, cust_mobile)
values
(?, ?, ?, ?, ?, ?, ?)
五月 17, 2017 10:25:56 下午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop
INFO: HHH10001008: Cleaning up connection pool [jdbc:mysql:///changejob]

查看数据库已生成数据