hibernate 经验谈2

Transaction ex = session.beginTransaction();
 session.save(user);
//强制保存这个blob
session.flush();
//通过刷新 user 来获得blob游标
session.refresh(user,LockMode.UPGRADE);

//写入真正的实际内容
oracle.sql.BLOB blob = (oracle.sql.BLOB)user.getImge();
OutputStream out = blob.getBinaryOutputStream();

FileInputStream img = new FileInputStream("c:\aaa.jpg");
byte[] buf = new byte[10240];
int len;
while((len = img.read(buf)) > 0)
...{
    out.write(buf,0,len);
}
img.close();
out.close();

tx.commit();