hibernate框架学习笔记1:搭建与测试

2018-02-13 10:07:24来源:cnblogs.com作者:一清人点击

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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 + "]";    }}

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

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