hibernate框架学习笔记1：搭建与测试

Posted 2020-10-24 xuyiqing

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：

 

lib文件夹下的required文件夹内的jar包为必须包：

 

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：

 

 

导入包完成：

 

导入约束：

 

复制这里的dtd文件以及文件中的这一行：

 

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 + "]";
    }
}

View Code

 

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：

 

查看数据库，成功添加一条新数据

 

搭建测试完毕