Java 如何从blob在磁盘上写入映像？

我正在尝试从磁盘上的数据库创建一个映像文件。我编写了以下代码：

{
    oracle.sql.BLOB blob1 = (BLOB) rs.getBlob(1);

    //fillFilePath is file path 
    File blobFile   = new File(fillFilePath);
    String checkExe[]=fillFilePath.split("\\.");

    FileOutputStream  outStream  = new FileOutputStream(blobFile); 
    InputStream inStream   = blob1.getBinaryStream(); 

    int length  = -1; 
    int size    = blob1.getBufferSize(); 
    byte[]  buffer  = new byte[size]; 

    BufferedImage image = ImageIO.read( inStream );
    System.out.println("Inside image upload");

    System.out.println("Inside image jpg");
    ImageIO.write(image, "JPG", outStream);

但它不起作用

请给我一些建议？

试试：

        BLOB image = ((OracleResultSet) rs).getBLOB("image");            
        blobLength = image.length();
        chunkSize = image.getChunkSize();
        binaryBuffer = new byte[chunkSize];

        for (position = 1; position <= blobLength; position += chunkSize) 
        {                               
            bytesRead = image.getBytes(position, chunkSize, binaryBuffer);               
            outputFileOutputStream.write(binaryBuffer, 0, bytesRead);                
            totbytesRead += bytesRead;
            totbytesWritten += bytesRead;
        }

BLOB image=（（OracleResultSet）rs.getBLOB（“image”）；
blobLength=image.length（）；
chunkSize=image.getChunkSize（）；
binaryBuffer=新字节[chunkSize]；
对于（position=1；position blob中是什么？如果是jpeg，则根本不需要使用ImageIO，只需将字节写入磁盘。我尝试将上述代码数据写入图像文件，但它不允许该图像。
BufferedImage bi= ImageIO.read(obj.getPhoto().getBinaryStream());//photo  is Blob.
             File outputfile = new File("folderInYourProject\\"+nameVar+".jpg");
             ImageIO.write(bi, "jpg", outputfile);