Generate file by reading a database field

Question

I’m having trouble generating files (both text and binary). The text files are not coming out with the correct encoding, and the binaries are corrupted. I’m using java 5 and struts.

The code to generate the files is

        final byte[] array = (byte[]) hashMap.get("BINARY_FILE");
    if (array != null && array.length > 0) {
        bis = new BufferedInputStream(new ByteArrayInputStream(array));
    }

    file = new File(tempDir.getAbsolutePath() + "\\" + path + fileName);
    final FileOutputStream fos = new FileOutputStream(file);

    if (!file.exists()) {
        file.createNewFile();
    }

    baos = new ByteArrayOutputStream();

    int c;
    if (size >= SIZE_LIMIT) {
        final BufferedOutputStream bos = new BufferedOutputStream(fos);
        for (int i = 0; i < size; i++) {
        bos.write(i);
        }
        bos.flush();
        bos.close();
    } else {
        while ((c = bis.read()) != -1) {
        fos.write(array);
        }
    }

    fos.flush();
    fos.close();

Answer 1

A cool idea is to save your object serializado.

public static void saveObject(Object object, String caminho, String nameOfArchive) throws FileNotFoundException, IOException
{
    FileOutputStream fileOutputStream = new FileOutputStream(caminho.concat(File.separator).concat(nameOfArchive));
    ObjectOutputStream of = new ObjectOutputStream(fileOutputStream);

    of.writeObject(object);

    of.close();
    fileOutputStream.close();
}

That way, if you’re going to reuse it on your system, you can do the following:

public static Object getObject(String arquivo) throws FileNotFoundException, IOException, ClassNotFoundException
{
    FileInputStream fi = new FileInputStream(arquivo);
    ObjectInputStream objInput = new ObjectInputStream(fi);
    Object _retorno = (Object) objInput.readObject();
    objInput.close();

    return _retorno;
}