hibernate框架学习笔记1:搭建与测试

时间:2022-10-01 07:25:56

hibernate框架属于dao层,类似dbutils的作用,是一款ORM(对象关系映射)操作

使用hibernate框架好处是:操作数据库不需要写SQL语句,使用面向对象的方式完成

这里使用eclipse工具搭建:

官网下载:https://sourceforge.net/projects/hibernate/files/hibernate-orm/5.0.7.Final/

下载.zip文件后解压:

hibernate框架学习笔记1:搭建与测试

lib文件夹下的required文件夹内的jar包为必须包:

hibernate框架学习笔记1:搭建与测试

另外还需要MySQL的驱动包:

mysql-connector-java-5.1.7-bin.jar

放入WEB-INFO的lib中:

hibernate框架学习笔记1:搭建与测试

导入包完成:

导入约束:

hibernate框架学习笔记1:搭建与测试

复制这里的dtd文件以及文件中的这一行:

hibernate框架学习笔记1:搭建与测试

上边是文件路径,下边粘贴复制的那一行

数据库创建一个表,做示例:

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;

src下新建一个domain实体包:

Customer类:

package domain;

public class Customer {

    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 + "]";
}
}

在domain包中,需要配置文件:Customer.hbm.xml

配置的具体参数含义后边再讲:

<?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 -->
<hibernate-mapping>
<class name="domain.Customer" table="cst_customer" >
<id name="cust_id" >
<!-- generator:主键生成策略 -->
<generator class="native"></generator>
</id>
<property name="cust_name" column="cust_name" ></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>

核心配置文件:src目录下:

hibernate.cfg.xml(注意名字不能改)

这里没有写注释的在后边详细介绍

<?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>
<!-- 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:///hibernate</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">xuyiqing</property> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</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> <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="domain/Customer.hbm.xml" /> </session-factory>
</hibernate-configuration>

好,到这里配置文件完成:

书写代码测试:

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; //测试Hibernate框架
public class Demo { @Test
//保存
public void function1(){
Configuration conf = new Configuration().configure();
SessionFactory sessionFactory = conf.buildSessionFactory();
Session session = sessionFactory.openSession();
Transaction tx = session.beginTransaction(); Customer customer = new Customer();
customer.setCust_name("腾讯");
session.save(customer); tx.commit();
session.close();
sessionFactory.close();
}
}

结果:

hibernate框架学习笔记1:搭建与测试

查看数据库,成功添加一条新数据

搭建测试完毕