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 实例

1.项目结构

2.pom.xml

       	
      
       4.0.0
      		
      
       org.hibernate
      	
      
       Hibernate-Image
      	
      
       war
      	
      
       0.0.1-SNAPSHOT
      	
      
       Hibernate-Image Maven Webapp
      	
      
       http://maven.apache.org
      		
      		
       
        UTF-8
       		
       
        5.1.6.Final
       	
      		
      		
       		
       			
        
         junit
        			
        
         junit
        			
        
         4.12
        			
        
         test
        		
       		
       		
       		    
        
         org.hibernate
        		    
        
         hibernate-core
        		    
        
         ${hibernate.version}
        		
       		
       		
       		    
        
         mysql
        		    
        
         mysql-connector-java
        		    
        
         5.1.42
        		
       	
        
          
       
        Hibernate-Image
         
      
     

3.Student.java

package org.hibernate.model;import java.sql.Blob;import java.util.Date;public class Student {	private long sid;// 学号	private String sname;// 姓名	private String gender;// 性别	private Date birthday;// 生日	private String address;// 性别	private Blob image;// 头像	public Student() {	}	public Student(String sname, String gender, Date birthday, String address, Blob image) {		this.sname = sname;		this.gender = gender;		this.birthday = birthday;		this.address = address;		this.image = image;	}	public long getSid() {		return sid;	}	public void setSid(long sid) {		this.sid = sid;	}	public String getSname() {		return sname;	}	public void setSname(String sname) {		this.sname = sname;	}	public String getGender() {		return gender;	}	public void setGender(String gender) {		this.gender = gender;	}	public Date getBirthday() {		return birthday;	}	public void setBirthday(Date birthday) {		this.birthday = birthday;	}	public String getAddress() {		return address;	}	public void setAddress(String address) {		this.address = address;	}	public Blob getImage() {		return image;	}	public void setImage(Blob image) {		this.image = image;	}}

4.Student.hbm.xml

5.hibernate.cfg.xml

     
     	
      	
      		
       		
       
        root
       		
       
        ***
       		
       
        com.mysql.jdbc.Driver
       		
       
        			jdbc:mysql:///hibernate?useSSL=true&characterEncoding=UTF-8		
       				
       		
       
        update
       		
       
        true
       		
       
        true
       		
       
        org.hibernate.dialect.MySQL5InnoDBDialect
       				
       		
       	
      
     

6.ImageTest.java

package org.hibernate.test;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.sql.Blob;import java.util.Date;import org.hibernate.Hibernate;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.hibernate.model.Student;import org.junit.After;import org.junit.Before;import org.junit.Test;public class ImageTest {	private SessionFactory sessionFactory;	private Session session;	private Transaction transaction;		@Before	public void before() {				Configuration config = new Configuration().configure();// 创建配置对象		sessionFactory = config.buildSessionFactory();// 创建SessionFactory对象		session = sessionFactory.openSession();// 创建session对象		transaction = session.beginTransaction(); // 开启事务			}		@After	public void after() {				transaction.commit();// 提交事务		session.close();// 关闭session		sessionFactory.close();// 关闭SessionFactory			}		@Test	public void saveStudentWithImage() throws Exception {				// 获取图片文件		File file = new File("C:/Users/chen/Pictures/demo.jpg");		// 获取图片文件的输入流		InputStream is = new FileInputStream(file);		// 创建一个Blob对象		Blob image = Hibernate.getLobCreator(session).createBlob(is, is.available());		// 创建Student对象		Student s = new Student("张三", "男", new Date(), "北京市", image);		// 保存对象		session.save(s);			}		@Test	public void readImage() throws Exception {				Student s = session.get(Student.class, 1L);		// 获取图片的Blob对象		Blob image = s.getImage();		// 获取照片的输入流		InputStream is = image.getBinaryStream();		// 创建输出文件		File file = new File("C:/Users/chen/Pictures/test.jpg");		// 获取输出流		OutputStream os = new FileOutputStream(file);		// 创建缓存区		byte[] buff = new byte[is.available()];		// 将输入流读入到缓存中		is.read(buff);		// 将缓存区数据写到输出流中		os.write(buff);		// 关闭输入流		is.close();		// 关闭输出流		os.close();			}	}

7.效果预览

　　7.1 执行saveStudentWithImage()方法

　　7.2 执行readImage()方法

参考：