Hibernate入门 链接Oracle数据库 简单增删改查

最近入门学习Hibernate框架,想分享总结一下踩过的坑和成功后的案例。java

所用软件:sql

eclipse数据库

Oracle数据库 (若是你使用的不是Oracle数据库能够修改hibernate.cfg.xml里面的配置)session

 

如今,咱们来看一下咱们的包结构和数据库表结构oracle

第一步:创建eclipse项目app

                       1.eclipse里面新建一个Dynamic Web Project项目框架

                       2.在src中建一个名叫hibernate.cfg.xml的xml文件和两个分别叫com.Sakura.maya.model和com.Sakura.maya.test的包。eclipse

                       3.在com.Sakura.maya.model包中建两个类Hibernate.java和Hibernate.hbm.xml的文件ide

                       4.在com.Sakura.maya.test包中创建一个叫HibernateAction的类学习

结构以下:

第二步:引入jar包

包名以下:

第三步:建立数据库

create table Table_wcc_text( 
  stu_id      number(10)   primary key, 
  stu_name    varchar2(20) not null, 
  stu_sex     varchar2(20)  default 'men' check(stu_sex in('men','women'))
)

结构以下:

 

第四步:加入代码

1.Hibernate.java

package com.Sakura.maya.model;

public class Hibernate {
	private int stu_id;
	private String stu_name;
	private String stu_sex;
	public int getStu_id() {
		return stu_id;
	}
	public void setStu_id(int stu_id) {
		this.stu_id = stu_id;
	}
	public String getStu_name() {
		return stu_name;
	}
	public void setStu_name(String stu_name) {
		this.stu_name = stu_name;
	}
	public String getStu_sex() {
		return stu_sex;
	}
	public void setStu_sex(String stu_sex) {
		this.stu_sex = stu_sex;
	}
	@Override
	public String toString() {
		return "HibernateAction [stu_id=" + stu_id + ", stu_name=" + stu_name
				+ ", stu_sex=" + stu_sex + "]";
	}
}

2.Hibernate.hbm.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
           "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
           "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory>
        <property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>
       <!--  若是不是Oracle数据库请修改-->
        <!-- <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> --> <!-- 数据库方言 若是不是Oracle数据库请修改-->
        <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property><!-- 引用jdbc包 若是不是Oracle数据库请修改-->
        <property name="hibernate.connection.username">用户名</property>
        <property name="hibernate.connection.password">密码</property>
        <property name="hibernate.connection.url">jdbc:oracle:数据库连接</property> <!-- 数据库连接 -->
        <property name="show_sql">true</property> <!-- true 执行完在控制台打印SQL语句 -->
            <!-- 表映射加载  -->
        <mapping resource="com/Sakura/maya/model/Hibernate.hbm.xml"/>
        
    </session-factory>
</hibernate-configuration>

3.hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?>
 <!DOCTYPE hibernate-mapping PUBLIC
           "-//Hibernate/hibernate-Mapping DTD 3.0//EN"
           "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping default-lazy="false" package="com.Sakura.maya.model">    <!-- 导入包 -->

    <class name="Hibernate" table="Table_wcc_text"> <!-- 表名 -->
        <id name="stu_id">    <!-- 主键 -->                        
            <generator class="assigned"/><!-- 若是主键是自增加改成class="native" -->
        </id>
        <!-- 对应的各个字段名 -->
        <property name="stu_name"/>
        <property name="stu_sex"/>
    
    </class>   
</hibernate-mapping>

4.HibernateAction.java

package com.Sakura.maya.test;

import java.util.List;

import javax.security.auth.kerberos.DelegationPermission;

import org.hibernate.*;
import org.hibernate.cfg.*;

import com.Sakura.maya.model.Hibernate;

public class HibernateAction {

	//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();


	public static void main(String[] args) {

		HibernateAction dl = new HibernateAction();
		dl.SelectAll();
	}

	public void Select(Integer stu_id) {

		// 查询
		Hibernate data = (Hibernate) session.get(Hibernate.class, stu_id);
		System.out.println(data.getStu_id() + data.getStu_name()
				+ data.getStu_sex());


	}

	public void SelectAll() {
		// 查询全部
		String hqlString = "from Hibernate";
		Query query = session.createQuery(hqlString);
		List<Hibernate> list = query.list();
		for (Hibernate ll : list) {
			System.out.print(ll);
		}
		session.close();
	}

	public void Insert() {
		//添加
        //1.造对象
		Hibernate data = new Hibernate();
		data.setStu_id('1');
		data.setStu_name("Sakura");
		data.setStu_sex("men");

        //2.用session.save()保存到数据库了
		try {
			session.beginTransaction();
			session.save(data);
			session.getTransaction().commit();
			System.out.print("添加成功");
		} catch (Exception ex) {
			session.getTransaction().rollback();
		}

		session.close();

	}

	//删除
    
	public void Delete(Integer stu_id) {
		//先查出
		Hibernate data = (Hibernate) session.get(Hibernate.class, stu_id);// get?�load?�能够查
		if (data != null) {
			session.beginTransaction();
			//删除提交数据库
			session.delete(data);
			System.out.print("删除成功");
			session.getTransaction().commit();
		}
		session.close();
		
	}

	public void update(Integer stu_id) {
		//修改
        //1.查
		Hibernate data = (Hibernate) session.load(Hibernate.class, stu_id);

		if (data != null) {
			session.beginTransaction();
			//2.改
			data.setStu_name("Sakura1");
			data.setStu_sex("women");
			//3.提交
			session.update(data);
			session.getTransaction().commit();
		}

		session.close();
		System.out.print("修改为功");
	}

}

OK!就搭建成功了!

 

在搭建之中碰见的小问题:

     1.显示链接不到数据库

       解决方法:多是你不是oracle数据库在hibernate.cfg.xml中修改链接方法。

     2.报错:javax/transaction/Synchronization

       解决方法:你须要下载一个jta.jar包

     3.报错:找不到hibernate.cfg.xml文件

       解决方法:缺乏jar包或者放的位置不对,放在src

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