02hibernate第一个工程

迷南。 2022-07-13 01:17 224阅读 0赞

### 上篇博文：[初始hibernate][hibernate]，我们介绍了Hibernate的基本概念、Hibernate的核心以及Hibernate的执行原理，可以很好帮助我们认识Hibernate。这篇博文，我们从实践角度，动手搭建第一个Hibernate实例。 ###

# 下载文件 #

## 1、Hibernate包下载地址:（这里我使用的是hibernate-release-4.3.11.Final） ##

[https://sourceforge.net/projects/hibernate/files/][https_sourceforge.net_projects_hibernate_files]

## 2、根据数据库选择合适的jdbc驱动包。Hibernate支持常用的数据库，比如 MySQL, Oracle,MS-SQL Server等。这些数据库都有JDBC Driver ##

> MySQL JDBC Driver下载地址：  
> [http://dev.mysql.com/downloads/connector/j/3.0.html][http_dev.mysql.com_downloads_connector_j_3.0.html]  
> Oracle JDBC Driver下载地址(下载前必须同意Oracle协议书)  
> [http://otn.oracle.com/software/htdocs/distlic.html?/software/tech/java/sqlj\_jdbc/htdocs/jdbc9201.html][http_otn.oracle.com_software_htdocs_distlic.html_software_tech_java_sqlj_jdbc_htdocs_jdbc9201.html]  
> MS-SQL Server JDBC Driver下载地址：  
> [http://www.microsoft.com/downloads/details.aspx?FamilyID=9f1874b6-f8e1-4bd6-947c-0fc5bf05bf71&displaylang=en][http_www.microsoft.com_downloads_details.aspx_FamilyID_9f1874b6-f8e1-4bd6-947c-0fc5bf05bf71_displaylang_en]

# 创建第一个hibernate项目 #

## 1、新建java项目 ##

## 2、导入相关jar包 ##

> antlr-2.7.7.jar  
> dom4j-1.6.1.jar  
> hibernate-commons-annotations-4.0.5.Final.jar  
> hibernate-core-4.3.10.Final.jar  
> hibernate-jpa-2.1-api-1.0.0.Final.jar  
> jandex-1.1.0.Final.jar  
> javassist-3.18.1-GA.jar  
> jboss-logging-3.1.3.GA.jar  
> jboss-logging-annotations-1.2.0.Beta1.jar  
> jboss-transaction-api\_1.2\_spec-1.0.0.Final.jar  
> mysql-connector-java-5.1.20-bin.jar

## 3、编写配置文件hibernate.cfg.xml文件，**放在src目录下** ##

<!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="connection.driver_class">
            com.mysql.jdbc.Driver
        </property>
        <property name="connection.url">
            jdbc:mysql://localhost:3306/test
        </property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>
        
        <property name="dialect">
            org.hibernate.dialect.MySQL5Dialect
        </property>
         
        <mapping resource="com/tracy/pojo/User.hbm.xml" />
    </session-factory>
    </hibernate-configuration>

## 4、编写实体类User.java ##

package com.tracy.pojo;
    
    public class User {
    
        private int id;
        private String name;
        private String pwd;
    
        public int getId() {
            return id;
        }
        public void setId(int id) {
            this.id = id;
        }
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public String getPwd() {
            return pwd;
        }
        public void setPwd(String pwd) {
            this.pwd = pwd;
        }
    
    }

## 5、编辑\*.hbm.xml文件，放在实体类所在的包下 ##

*  文件名一般为实体类的名称，如User.hbm.xml

<?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>
        <class name="com.tracy.pojo.User" table="user">
            <id name="id">
                
                <generator class="native"></generator>
            </id>
            
            <property name="name"/> 
            <property name="pwd"/>  
        </class>
    </hibernate-mapping>

## 6、创建数据库表 ##

![数据表结构][SouthEast]

## 7、编写测试类Test.java ##

package com.csu.test;
    
    import org.hibernate.Session;
    import org.hibernate.SessionFactory;
    import org.hibernate.Transaction;
    import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
    import org.hibernate.cfg.Configuration;
    import org.hibernate.service.ServiceRegistry;
    
    import com.csu.pojo.User;
    
    public class Test {
    
        public static void main(String[] args) {
            //1、新建Configuration对象
            Configuration cfg = new Configuration().configure();
            //2、通过Configuration创建SessionFactory对象
            ServiceRegistry service = new StandardServiceRegistryBuilder()
                    .applySettings(cfg.getProperties())
                    .build();//hibernate4.3
            SessionFactory factory = cfg.buildSessionFactory(service);
            //3、通过SessionFactory得到Session
            Session session = factory.openSession();
            //4、通过Session对象得到Transaction对象
            Transaction transaction = session.beginTransaction();//开启事务
            //5、保存数据
            User user = new User();
            user.setName("mark");
            user.setPwd("111");
            session.save(user);
            //6、提交事务
            transaction.commit();
            //7、关闭Session
            session.close();
        }
    
    }

# 结语 #

## 就这样一个简单的hibernate项目就创建完毕了。 ##

[hibernate]: http://blog.csdn.net/tracydragonlxy/article/details/53728474
[https_sourceforge.net_projects_hibernate_files]: https://sourceforge.net/projects/hibernate/files/
[http_dev.mysql.com_downloads_connector_j_3.0.html]: http://dev.mysql.com/downloads/connector/j/3.0.html
[http_otn.oracle.com_software_htdocs_distlic.html_software_tech_java_sqlj_jdbc_htdocs_jdbc9201.html]: http://otn.oracle.com/software/htdocs/distlic.html?/software/tech/java/sqlj_jdbc/htdocs/jdbc9201.html
[http_www.microsoft.com_downloads_details.aspx_FamilyID_9f1874b6-f8e1-4bd6-947c-0fc5bf05bf71_displaylang_en]: http://www.microsoft.com/downloads/details.aspx?FamilyID=9f1874b6-f8e1-4bd6-947c-0fc5bf05bf71&displaylang=en
[SouthEast]: /images/20220713/b056c4b805e14b28af34a68f62e36ddd.png