• hibernate框架学习笔记1:搭建与测试


    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

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  • 原文地址:https://www.cnblogs.com/xuyiqing/p/8445760.html
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