Writing thumbnail to blob column

Question

hi i am taking bufferedinputstream as parameter and create thumbnail frm it and stored in blob column but when i retrive that blob column i get blank (black) image as thumbnail plz help me out i have given code here.
public int addThumbnailDtl(BufferedInputStream localbuf,InputStream inputlocal , String cvdplNo,String fileName,String folderName,String empCode,String prjName,String ext1)
throws Exception{
               System.out.println("addThumbnailDtl");
     ConnectionPool ovPool               = null;
          Connection ovCon               = null;     
          Statement ovStmt               = null;
          ResultSet ovResultSet          = null;
     ResultSet ovResultSet1          = null;
          String          sqlStr               = null;
          String          salQuery     = null;
          String          sqlStrUpdate     = null;
          int rowCount =0;
          int chunkSize;
byte[] binaryBuffer;
long position                    =1;
          long                    position1 = 1;
int bytesRead = 0;
          int                    bytesRead1                    = 0;
int bytesWritten = 0;
int totbytesRead = 0;
int totbytesWritten = 0;
          String                    tableName                    = null;
          String                    t_fileValue                    = null;
          String                    t_fileName                    = null;
          String                    vId=null;
          //String size=String.valueOf(fileSize);
          oracle.sql.BLOB image = null;
          BufferedImage thumb = null;
          BufferedOutputStream outputFileOutputStream = null; // newly added 1
          File ImgFile = null;                                        // newly added 3
          // BufferedImage buffimg = null;                              // newly added 4
          String thumbimg               = null;                         // newly added.
          BufferedInputStream inputLocalBuf1     =null;
          binaryBuffer =new byte[8192];
          t_fileValue = "V_FILE_CONTENTS";
               try{
               ovPool = new ConnectionPool();
                    ovCon = ovPool.createConnection();
                    ovCon.setAutoCommit(false);
                    ovStmt = ovCon.createStatement();
                    System.out.println("1");
                    salQuery="SELECT V_ID FROM FILEMANAGER_MST "+
                    "WHERE V_PRJ_NAME='"+prjName+"' AND V_CVDPLNO='"+cvdplNo+"'AND V_FILE_NAME='"+fileName+"'";
                    System.out.println("2 Query--"+salQuery);
                    ovResultSet= ovStmt.executeQuery(salQuery);
                    ovResultSet.next();
                    vId=ovResultSet.getString(1);
                    System.out.println("3 Vid --- "+vId);
               sqlStr = "INSERT INTO FILE_THUMBNAIL VALUES('"+vId+"','"+fileName+"','"+folderName+"','111',EMPTY_BLOB(),'"+ext1+"')";
               //sqlStr = "INSERT INTO FILEMANAGER_DATA VALUES('"+vId+"','"+fileName+"','"+folderName+"','111',EMPTY_BLOB(),'"+ext1+"')";
                    System.out.println(sqlStr);
                    ovStmt.executeUpdate(sqlStr);
                    System.out.println("Successfully Inserted Record...."+cvdplNo);
                    sqlStrUpdate = " SELECT "+t_fileValue+" FROM FILE_THUMBNAIL WHERE V_ID = '"+vId+"' FOR UPDATE";
                    System.out.println("sqlStrUpdate=> "+sqlStrUpdate);
                    ovResultSet1=ovStmt.executeQuery(sqlStrUpdate);
                    System.out.println("Successful Get Record for Update");
                    if(ovResultSet1 != null){
                         System.out.println("In If Satement");
                         while(ovResultSet1.next()) {
                              System.out.println("In While Loop");
                              image = (oracle.sql.BLOB) ovResultSet1.getBlob (t_fileValue);
                              //oracle.sql.BLOB image = ((OracleResultSet)ovResultSet).getBLOB(t_fileValue);
                              System.out.println("Transfer into BLOB data");
                              chunkSize = image.getChunkSize();
                              System.out.println("1");
                              binaryBuffer = new byte[chunkSize];
                              System.out.println("2");
                              position = 1;
                              System.out.println("3");
                              if(inputlocal==null)
                                   System.out.println("blank inputlocal");
                              BufferedInputStream bInp=new BufferedInputStream(localbuf);
                              BufferedImage im = ImageIO.read(localbuf);
                              System.out.println("11");
                              int tw = 100;//im.getWidth()/5;
                              System.out.println("12");
                              int th = 100;//im.getHeight()/5;
                              System.out.println("5 "+tw+" Height "+th);
                              thumb = new BufferedImage(tw,th,BufferedImage.TYPE_INT_RGB);
                              Graphics2D gScaledImg = thumb.createGraphics();
                              gScaledImg.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
                              BufferedImage img = ImageIO.read(localbuf); // taking inputlocalbuf
                              gScaledImg.drawImage(img, 0, 0, 100, 100, null);
                              ByteArrayOutputStream out = new ByteArrayOutputStream();
                              ImageIO.write(thumb,"jpeg",out);
                              byte[] buf = out.toByteArray();
                              ByteArrayInputStream inStream = new ByteArrayInputStream(buf);
                              while ((bytesRead = inStream.read(binaryBuffer)) != -1)
                                   System.out.println("OOOOOOOOOOOOOOOOOOOOOOOOOO");
                                   bytesWritten = image.putBytes(position, binaryBuffer, bytesRead);
                                   position += bytesRead;
                                   totbytesRead += bytesRead;
                                   totbytesWritten += bytesWritten;
                              System.out.println("7 "+position1);
               }catch(SQLException sqlEx){
                              //System.out.println("SQLException sqlstr=>"+sqlStr);
                              int errCode = sqlEx.getErrorCode();
                              String sqlMessage = sqlEx.getMessage();
                              String sqlState = sqlEx.getSQLState();
                              System.err.println("Message: " + sqlMessage);
                              System.err.println("SQL state: " + sqlState);
                              System.err.println("Error code: " + errCode);
                    }catch(Exception e){
                         System.out.println("Exception sqlstr "+e.getMessage());
                    }finally{
               try{
                    ovCon.setAutoCommit(true);
                    ovCon.commit();
                    if(ovResultSet != null)
ovResultSet.close();
ovResultSet = null;
               if(ovResultSet1 != null)
ovResultSet1.close();
ovResultSet1 = null;
                    if(ovStmt != null)
ovStmt.close();
                         ovStmt = null;
                    ovPool.close(ovCon);
                    ovCon = null;
                    ovPool = null;
               catch(Exception err){
                    System.out.println("Already Closing the connection / statement / resultset");
return 0;
}

Answer 1

First, what is a blob column, second, use the code tags