Home > Article > Database > hibernate对大数据资源的处理操作

hibernate对大数据资源的处理操作

WBOYOriginal: 2016-06-07 15:23:191067browse

bean文件 package tk.blank_hibernate.bean;import java.io.Serializable;import java.sql.Blob;public class Image implements Serializable{/** * */private static final long serialVersionUID = 1L;private Integer id;private Blob image;public Image

bean文件

package tk.blank_hibernate.bean;

import java.io.Serializable;
import java.sql.Blob;

public class Image implements Serializable{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private Integer id;
	private Blob image;
	public Image() {
		super();
		// TODO Auto-generated constructor stub
	}
	public Image(Integer id, Blob image) {
		super();
		this.id = id;
		this.image = image;
	}
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public Blob getImage() {
		return image;
	}
	public void setImage(Blob image) {
		this.image = image;
	}
	@Override
	public String toString() {
		return "Image [id=" + id + ", image=" + image + "]";
	}
	

}

映射文件的书写

<?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">
<hibernate-mapping package="tk.blank_hibernate.bean">
	<class name="Image" table="image" catalog="hiber_jd">
		<!-- 映射符主键 -->
		<id name="id" column="id">
			<generator class="native"/>
		</id>
		<property name="image" column="image" type="blob" />
	</class>
</hibernate-mapping>

处理所有共同操作的基础dao接口

package tk.blank_hibernate.dao;

import java.io.Serializable;
import java.util.List;
import java.util.Set;

public interface BaseDao {
	/**
	 * 增加数据
	 * 
	 * @param entity
	 * @return
	 */
	void saveObject(Object entity);

	/**
	 * 删除数据
	 * 
	 * @param entity
	 */
	void deleteObject(Object entity);

	/**
	 * 根据ID删除数据
	 * 
	 * @param clazz
	 * @param id
	 */
	void deleteObject(Class clazz, Serializable id);

	/**
	 * 更改数据
	 * 
	 * @param entity
	 */
	void updateObject(Object entity);

	/**
	 * 根据ID查询数据
	 * 
	 * @param clazz
	 * @param id
	 * @return
	 */
	Object getObject(Class clazz, Serializable id);

	/**
	 * 根据ID查询数据
	 * 
	 * @param clazz
	 * @param id
	 * @return
	 */
	Object loadObject(Class clazz, Serializable id);

	/**
	 * 查询数据表的所有数据
	 * @param clazz
	 * @return
	 */
	List getObjectAll(Class clazz);
	

}

处理图片的接口

package tk.blank_hibernate.dao;

public interface ImageDao extends BaseDao {

}

实现处理方法的类

package tk.blank_hibernate.dao.impl;

import java.io.Serializable;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.hibernate.Session;
import org.hibernate.Transaction;

import tk.blank_hibernate.bean.Goods;
import tk.blank_hibernate.dao.BaseDao;
import tk.blank_hibernate.util.BaseHibernateDaoImpl;

public class BaseDaoImpl extends BaseHibernateDaoImpl implements BaseDao {

	@Override
	public void saveObject(Object entity) {
		System.out
				.println("开始执行BaseDaoImpl中的方法=======================saveObject");
		Session session = getSessionObject();
		Transaction transaction = session.beginTransaction();
		session.save(entity);
		transaction.commit();
	}

	@Override
	public void deleteObject(Object entity) {
		System.out
				.println("开始执行BaseDaoImpl中的方法=======================deleteObject");
		Session session = getSessionObject();
		Transaction transaction = session.beginTransaction();
		session.delete(entity);
		transaction.commit();
	}

	@Override
	public void deleteObject(Class clazz, Serializable id) {
		System.out
				.println("开始执行BaseDaoImpl中的方法=======================deleteObject");
		Session session = getSessionObject();
		Transaction transaction = session.beginTransaction();
		session.delete(getObject(clazz, id));
		transaction.commit();
	}

	@Override
	public void updateObject(Object entity) {
		System.out
				.println("开始执行BaseDaoImpl中的方法=======================updateObject");
		Session session = getSessionObject();
		Transaction transaction = session.beginTransaction();
		session.update(entity);
		transaction.commit();
	}

	@Override
	public Object getObject(Class clazz, Serializable id) {
		System.out
				.println("开始执行BaseDaoImpl中的方法=======================getObject");
		Session session = getSessionObject();
		Transaction transaction = session.beginTransaction();
		Object object= session.get(clazz, id);
		return object;
	}

	@Override
	public Object loadObject(Class clazz, Serializable id) {
		System.out
				.println("开始执行BaseDaoImpl中的方法=======================loadObject");
		return null;
	}

	@Override
	public List getObjectAll(Class clazz) {
		System.out
				.println("开始执行BaseDaoImpl中的方法=======================getObjectAll");
		Transaction transaction = getSessionObject().beginTransaction();

		List list = getSessionObject().createQuery("from "+clazz.getName()).list();
		transaction.commit();
		return list;
	}



}

处理图片的类实现

package tk.blank_hibernate.dao.impl;

import tk.blank_hibernate.dao.ImageDao;

public class ImageDaoImpl extends BaseDaoImpl implements ImageDao {

}

处理所有共同操作的service的接口

package tk.blank_hibernate.service;

import java.io.Serializable;
import java.util.List;

public interface BaseService {
	/**
	 * 增加数据
	 * 
	 * @param entity
	 * @return
	 */
	void saveObject(Object entity);

	/**
	 * 删除数据
	 * 
	 * @param entity
	 */
	void deleteObject(Object entity);

	/**
	 * 根据ID删除数据
	 * 
	 * @param clazz
	 * @param id
	 */
	void deleteObject(Class clazz, Serializable id);

	/**
	 * 更改数据
	 * 
	 * @param entity
	 */
	void updateObject(Object entity);

	/**
	 * 根据ID查询数据
	 * 
	 * @param clazz
	 * @param id
	 * @return
	 */
	Object getObject(Class clazz, Serializable id);

	/**
	 * 根据ID查询数据
	 * 
	 * @param clazz
	 * @param id
	 * @return
	 */
	Object loadObject(Class clazz, Serializable id);

	/**
	 * 查询数据表的所有数据
	 * 
	 * @param clazz
	 * @return
	 */
	List getObjectAll(Class clazz);
}

处理图片的service的接口

package tk.blank_hibernate.service;

public interface ImageService extends BaseService {

}处理所有共同方法的service的实现

package tk.blank_hibernate.service.impl;

import java.io.Serializable;
import java.util.List;

import tk.blank_hibernate.dao.BaseDao;
import tk.blank_hibernate.dao.impl.BaseDaoImpl;
import tk.blank_hibernate.service.BaseService;

public class BaseServiceImpl  implements BaseService {

	BaseDao baseDao =new BaseDaoImpl();

	@Override
	public void saveObject(Object entity) {
		System.out.println("开始执行BaseServiceImpl中的方法==============saveObject");
		baseDao.saveObject(entity);
	}

	@Override
	public void deleteObject(Object entity) {
		System.out.println("开始执行BaseServiceImpl中的方法==============deleteObject");
		baseDao.deleteObject(entity);
	}

	@Override
	public void deleteObject(Class clazz, Serializable id) {
		System.out.println("开始执行BaseServiceImpl中的方法==============deleteObject");
		baseDao.deleteObject(clazz, id);
	}

	@Override
	public void updateObject(Object entity) {
		System.out.println("开始执行BaseServiceImpl中的方法==============updateObject");
		baseDao.updateObject(entity);
	}

	@Override
	public Object getObject(Class clazz, Serializable id) {
		System.out.println("开始执行BaseServiceImpl中的方法==============getObject");
		return baseDao.getObject(clazz, id);
	}

	@Override
	public Object loadObject(Class clazz, Serializable id) {
		System.out.println("开始执行BaseServiceImpl中的方法==============loadObject");
		return baseDao.loadObject(clazz, id);
	}

	@Override
	public List getObjectAll(Class clazz) {
		System.out.println("开始执行BaseServiceImpl中的方法==============getObjectAll");
		return baseDao.getObjectAll(clazz);
	}

}

处理图片的service的实现

package tk.blank_hibernate.service.impl;

import tk.blank_hibernate.service.ImageService;

public class ImageServiceImpl extends BaseServiceImpl implements ImageService {

}

单独产生session的接口

package tk.blank_hibernate.util;

import org.hibernate.Session;

public interface IHibernateConnection {
public Session getSessionObject();
}

单独产生session的实现类

package tk.blank_hibernate.util;

import org.hibernate.Session;

public class BaseHibernateDaoImpl implements IHibernateConnection {

@Override
public Session getSessionObject() {
return HiberUtil.openSession();
}

}

产生session的实质方法

package tk.blank_hibernate.util;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;

public class HiberUtil {
	static Configuration cfg;
	static ServiceRegistry serviceRegistry;
	static SessionFactory sessionFactory;
	
	static{
		cfg=new Configuration().configure();
		serviceRegistry=new StandardServiceRegistryBuilder().applySettings(cfg.getProperties()).build();
		sessionFactory =cfg.buildSessionFactory(serviceRegistry);
	}
	
	
	public static Session openSession(){
		//返回当前的session的连接对象
		return sessionFactory.getCurrentSession();
	}
}

配置hibernate与数据库连接的入口文件hibernate.cfg.xml

<?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>
	<property name="connection.driver_class">
		com.mysql.jdbc.Driver
	</property>
	<property name="connection.url">
		jdbc:mysql://localhost:3306/hiber_jd
	</property>
	<property name="connection.username">root</property>
	<property name="connection.password">admin</property>
	<!-- 数据库的方言 -->
	<property name="hibernate.dialect">
		org.hibernate.dialect.MySQLDialect
	</property>
	<!-- Enable Hibernate&#39;s automatic session context management -->
	<property name="current_session_context_class">thread</property>

	<!-- 显示操作的sql语句 -->
	<property name="hibernate.show_sql">true</property>
	<!-- 格式sql语句 -->
	<property name="hibernate.format_sql">false</property>
	<!-- 自动创建和更新表结构 -->
	<property name="hibernate.hbm2ddl.auto">update</property>
	<mapping resource="tk/blank_hibernate/bean/Image.hbm.xml" />
</session-factory>
</hibernate-configuration>

测试代码

package tk.blank_hibernate.junit;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Blob;
import java.sql.SQLException;

import org.hibernate.Hibernate;
import org.junit.Test;

import tk.blank_hibernate.bean.Image;
import tk.blank_hibernate.service.ImageService;
import tk.blank_hibernate.service.impl.ImageServiceImpl;
import tk.blank_hibernate.util.HiberUtil;

public class ImageTest {

	// 创建ImageService处理对象
	ImageService imageService = new ImageServiceImpl();

	@Test
	public void save() {
		// 创建img对象
		Image image = new Image();
		// 读取文件
		File file = new File("F:\\webprogect\\hibernate_jd\\src\\ni.jpg");
		try {
			// 创建文件的输入流,将文件加载到流中
			FileInputStream fis = new FileInputStream(file);
			// 创建blob大数据对象|||||在4之后要用这样的方式获取
			Blob blob = Hibernate.getLobCreator(HiberUtil.openSession())
					.createBlob(fis, file.length());

			//将大数据存储到 
			image.setImage(blob);
			imageService.saveObject(image);

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	@Test
	public void getImage() throws SQLException {
		Image image = (Image) imageService.getObject(Image.class, 1);

		// 判断得到得数据是否为空
		if (image != null) {
			InputStream is = image.getImage().getBinaryStream();
			File file = new File("D:\\a.jpg");
			try {
				FileOutputStream fos = new FileOutputStream(file);
				byte buffer[] = new byte[1024];

				int len = 0;
				while ((len = is.read(buffer)) != -1) {
					fos.write(buffer, 0, len);
				}
				fos.close();
				is.close();

			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

		}

	}

}

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：POSTGRESQL与MYSQL实现分割字符串的方法对比Next article：12款免费与开源的NoSQL数据库介绍

See more

hibernate对大数据资源的处理操作

Related articles