hibernate框架环境搭建与使用

一时失言乱红尘 2022-05-12 10:08 229阅读 0赞

文章出处：[https://www.cnblogs.com/hq233/p/6497985.html][https_www.cnblogs.com_hq233_p_6497985.html]

搭建环境

### 一、新建一个项目 ， 导包   一个是hibernate的jar包，一个是jdbc的jar包 ###

hibernate的jar包

![1064320-20170303171216016-1000095069.png][]

这些jar包全部导入

### 二、配置Hibernate。 ###

1.建立hibernate.cfg.xml文件， 包所在的文件夹的project里去搜索cfg.xml复制并修改![1064320-20170303173634516-941331870.png][]

![1064320-20170303173109345-1405364819.png][]

2.配置hibernate.cfg.xml文件

![复制代码][copycode.gif]

<!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>
            <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> 
            <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
            <property name="hibernate.connection.username">root</property>
            <property name="hibernate.connection.password"></property>
            <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/myzy?characterEncoding=GBK</property> 
            <property name="show_sql">true</property> 
                
            <mapping resource="com/itnba/maya/model/Fruit.hbm.xml"/>
            
        </session-factory>
    </hibernate-configuration>

![复制代码][copycode.gif]

3.每个配置项的值可以从project/etc/hibernate.properties中搜索

![1064320-20170303172849173-1682912713.png][]

### 三、准备数据库 ###

### ![1064320-20170303174103188-895731715.png][] ###

### 四、准备实体(建议使用：引用类型。建议类名属性名与列名一致) ###

![复制代码][copycode.gif]

package com.itnba.maya.model;
    
    public class Fruit {
        public String getIds() {
            return ids;
        }
        public void setIds(String ids) {
            this.ids = ids;
        }
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public Double getPrice() {
            return price;
        }
        public void setPrice(Double price) {
            this.price = price;
        }
        public String getSource() {
            return source;
        }
        public void setSource(String source) {
            this.source = source;
        }
        public Integer getNumbers() {
            return numbers;
        }
        public void setNumbers(Integer numbers) {
            this.numbers = numbers;
        }
        public String getImage() {
            return image;
        }
        public void setImage(String image) {
            this.image = image;
        }
        private String ids;
        private String name;
        private Double price;
        private String source;
        private Integer numbers;
        private String image;
    
    }

![复制代码][copycode.gif]

### 五、准备映射文件 实体类名.hbm.xml 例:Fruit.hbm.xml ###

1.建立：实体类名.hbm.xml文件。包所在的文件夹的project里去搜索hbm.xml复制并修改

要跟实体类放一个包里

![1064320-20170303175409516-1200238723.png][]

2.配置实体类名.hbm.xml文件

![复制代码][copycode.gif]

<?xml version="1.0"?>
    <!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
    <hibernate-mapping default-lazy="false" package="com.itnba.maya.model">    
    
        <class name="Fruit" table="Fruit"> 
            <id name="ids">                            
                <generator class="assigned"/>
            </id>
            
            <property name="name"/>
            <property name="price"/>
            <property name="source"/> 
            <property name="numbers"/>
            <property name="image"/>
        
        </class>   
    </hibernate-mapping>

![复制代码][copycode.gif]

###  六、写代码 ###

说明：这里的session不是web中的session。  
web中的session代表的是客户端与web服务器之间的会话。  
这里的session指的是程序与数据库之前的会话，它是由hibernate进行管理的。

添加

![复制代码][copycode.gif]

package com.itnba.maya.test;
    import java.util.List;
    
    import org.hibernate.*;
    import org.hibernate.cfg.*;
    
    import com.itnba.maya.model.Fruit;
    
    public class AA {
    
        public static void main(String[] args) {
            //读取hibernate.cfg.xml的配置，加载Hiberna的类库
            Configuration config=new Configuration().configure();
            //根据配置，生成session工厂
            SessionFactory factory= config.buildSessionFactory();
            //用工厂生成session
            Session session =factory.openSession();
            //添加
            //1.造对象
                    Fruit data = new Fruit();
                    data.setIds("s002");
                    data.setName("芒果");
                    data.setSource("博山");
                    data.setPrice(10.0);
                    data.setNumbers(200);
                    data.setImage("无");
    
            //2.用session.save()保存到数据库了
                    try{
                        session.beginTransaction();
                        session.save(data);
                        session.getTransaction().commit();
                    }
                    catch(Exception ex){
                        session.getTransaction().rollback();
                    }
                    
            session.close();
        }
    
    }

![复制代码][copycode.gif]

![1064320-20170303180404751-514471915.png][]

查询

![复制代码][copycode.gif]

package com.itnba.maya.test;
    import java.util.List;
    
    import org.hibernate.*;
    import org.hibernate.cfg.*;
    
    import com.itnba.maya.model.Fruit;
    
    public class AA {
    
        public static void main(String[] args) {
            //读取hibernate.cfg.xml的配置，加载Hiberna的类库
            Configuration config=new Configuration().configure();
            //根据配置，生成session工厂
            SessionFactory factory= config.buildSessionFactory();
            //用工厂生成session
            Session session =factory.openSession();         
            //查询
                    //查单条数据
                    Fruit data=session.get(Fruit.class, "k001");
                    System.out.println(data.getName()+data.getPrice()+data.getNumbers());
                    
                    //查询所有数据
                    List<Fruit> list = session.createQuery("from Fruit").getResultList();
                    for(Fruit a:list){
                        System.out.println(a.getName()+a.getPrice()+a.getNumbers());
                    }
            session.close();
        }
    
    }

![复制代码][copycode.gif]

控制台显示

![1064320-20170303181236782-272723290.png][]

删除

![复制代码][copycode.gif]

package com.itnba.maya.test;
    import java.util.List;
    
    import org.hibernate.*;
    import org.hibernate.cfg.*;
    
    import com.itnba.maya.model.Fruit;
    
    public class AA {
    
        public static void main(String[] args) {
            //读取hibernate.cfg.xml的配置，加载Hiberna的类库
            Configuration config=new Configuration().configure();
            //根据配置，生成session工厂
            SessionFactory factory= config.buildSessionFactory();
            //用工厂生成session
            Session session =factory.openSession();                
            //删除
                    //先查出
                    Fruit data = session.load(Fruit.class,"k002");//get和load都可以查
                    if(data!=null){
                        session.beginTransaction();
                        //删除提交数据库
                        session.delete(data);
                        session.getTransaction().commit();
                    }
            session.close();
        }
    
    }

![复制代码][copycode.gif]

![1064320-20170303181645985-204060865.png][]

修改

![复制代码][copycode.gif]

package com.itnba.maya.test;
    import java.util.List;
    
    import org.hibernate.*;
    import org.hibernate.cfg.*;
    
    import com.itnba.maya.model.Fruit;
    
    public class AA {
    
        public static void main(String[] args) {
            //读取hibernate.cfg.xml的配置，加载Hiberna的类库
            Configuration config=new Configuration().configure();
            //根据配置，生成session工厂
            SessionFactory factory= config.buildSessionFactory();
            //用工厂生成session
            Session session =factory.openSession();
            //修改
                    //1.查
                    Fruit data = session.load(Fruit.class,"s002");
                    
                    if(data != null){
                        session.beginTransaction();
                        //2.改
                        data.setName("哈密瓜");
                        data.setPrice(11.1);
                        data.setNumbers(99);
                        //3.提交
                        session.update(data);
                        session.getTransaction().commit();
                    }
                    
            session.close();
        }
    
    }

![复制代码][copycode.gif]

![1064320-20170303181824813-815408323.png][]

[https_www.cnblogs.com_hq233_p_6497985.html]: https://www.cnblogs.com/hq233/p/6497985.html
[1064320-20170303171216016-1000095069.png]: /images/20220512/8fd8a160f48c434fa6f571e91d634077.png
[1064320-20170303173634516-941331870.png]: /images/20220512/38c03145ff1f432ebdb8e4121a289be8.png
[1064320-20170303173109345-1405364819.png]: /images/20220512/99c08f0a406249ab84bcc072868a04d0.png
[copycode.gif]: /images/20220512/d10a415985b64c14bbb7c75532adbb36.png
[1064320-20170303172849173-1682912713.png]: /images/20220512/ad56cbd2e95942549f36bc6abeef3d6c.png
[1064320-20170303174103188-895731715.png]: /images/20220512/6ccbd9d8fb6c4744afcf00c41002fee5.png
[1064320-20170303175409516-1200238723.png]: /images/20220512/ac17b4c1db664d6c89db8507d6a8d992.png
[1064320-20170303180404751-514471915.png]: /images/20220512/52883c12063d425caec41d555cb6ecf3.png
[1064320-20170303181236782-272723290.png]: /images/20220512/408c02cee1a94b3cbcce967494e22978.png
[1064320-20170303181645985-204060865.png]: /images/20220512/fd3f583473024023ba3759f55179324e.png
[1064320-20170303181824813-815408323.png]: /images/20220512/b756b8273b35469d8d5dcd4b8a011839.png