Store file streams into dicom object in oracle 11g (BLOB construct)

Question

The datastream is transfered from network and stored into oracle DB as a blob , then I use the Dicom construct to build the dicom object . The problem is , before I have the blob in the DB , I have to create an empty Blob object ,I use this this empty blob and do the datastream store .
Does somebody have the idea ,how to directly store the datastream into the DB BLOB ,or can I put this BLOB as the variable in JAVA .
my program like this :
stmt.executeUpdate("insert into blob_tbl(id,my_blob) values('" + in + "',empty_blob())");
     ResultSet rs = stmt.executeQuery("select my_blob from blob_tbl where id='" + in + "' for update" );
     if(rs.next())
     Blob blob = rs.getBlob(1);
     OutputStream out = ((oracle.sql.BLOB)blob).getBinaryOutputStream();
     byte[] b = new byte[((oracle.sql.BLOB)blob).getBufferSize()];
     InputStream fin = inStream;
     int len = 0;
     while( (len = fin.read(b)) != -1)
     out.write(b,0,len);
     fin.close();
     out.close();
     conn.commit();

Answer 1

The datastream is transfered from network and stored into oracle DB as a blob , then I use the Dicom construct to build the dicom object . The problem is , before I have the blob in the DB , I have to create an empty Blob object ,I use this this empty blob and do the datastream store .
Does somebody have the idea ,how to directly store the datastream into the DB BLOB ,or can I put this BLOB as the variable in JAVA .
my program like this :
stmt.executeUpdate("insert into blob_tbl(id,my_blob) values('" + in + "',empty_blob())");
     ResultSet rs = stmt.executeQuery("select my_blob from blob_tbl where id='" + in + "' for update" );
     if(rs.next())
     Blob blob = rs.getBlob(1);
     OutputStream out = ((oracle.sql.BLOB)blob).getBinaryOutputStream();
     byte[] b = new byte[((oracle.sql.BLOB)blob).getBufferSize()];
     InputStream fin = inStream;
     int len = 0;
     while( (len = fin.read(b)) != -1)
     out.write(b,0,len);
     fin.close();
     out.close();
     conn.commit();