1.hibernate3

public class BlobTest{   private byte[] portrait;    @Column(name = "PORTRAIT",  nullable = true, length = 0)    public byte[] getPortrait()    {        return portrait;    }}Object v = map.get(n);v:是 从map中获取，map为返回的键值集合。f:类中定义的属性，就是portrait ,if(f.getType().getName().equals(byteTypeName.getClass().getName())){ try {     byte[] imageData=null;   SerializableBlobProxy blob = (SerializableBlobProxy)Proxy.getInvocationHandler(v);   BufferedInputStream stream = new BufferedInputStream(blob.getWrappedBlob().getBinaryStream());     ByteArrayOutputStream out = new ByteArrayOutputStream();     byte[] buff = new byte[1024];     int i = 0;     while((i=stream.read(buff))!=-1){       imageData=ArrayUtils.addAll(imageData, buff);    }     BeanUtils.setProperty(obj, n, imageData);    }catch (SQLException e) {     e.printStackTrace();    } catch (IOException e) {     e.printStackTrace();    }

2.hibernate4

类：@Column(name = "PORTRAIT",  nullable = true, length = 0)    @Basic    @Lob    public byte[] getPortrait()    {        return portrait;    }    v = map.get(str);    if (v != null) {    byte[] byteTypeName={1};    if(f.getType().getName().equals(byteTypeName.getClass().getName())){    try {        byte[] imageData=null;      SerializableBlob blob = (SerializableBlob)v;        BufferedInputStream stream = new BufferedInputStream(blob.getWrappedBlob().getBinaryStream());          ByteArrayOutputStream out = new ByteArrayOutputStream();          byte[] buff = new byte[1024];          int i = 0;           while((i=stream.read(buff))!=-1){              mageData=ArrayUtils.addAll(imageData, buff);        }        BeanUtils.setProperty(obj, n, imageData);        }catch (SQLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }