java io

java io.java

 private static void doCopyFile(File srcFile, File destFile, boolean preserveFileDate) throws IOException {
        if (destFile.exists() && destFile.isDirectory()) {
            throw new IOException("Destination '" + destFile + "' exists but is a directory");
        }

        FileInputStream fis = null;
        FileOutputStream fos = null;
        FileChannel input = null;
        FileChannel output = null;
        try {
            fis = new FileInputStream(srcFile);
            fos = new FileOutputStream(destFile);
            input  = fis.getChannel();
            output = fos.getChannel();
            long size = input.size();
            long pos = 0;
            long count = 0;
            while (pos < size) {
                count = (size - pos) > FIFTY_MB ? FIFTY_MB : (size - pos);
                pos += output.transferFrom(input, pos, count);
            }
        } finally {
            IOUtils.closeQuietly(output);
            IOUtils.closeQuietly(fos);
            IOUtils.closeQuietly(input);
            IOUtils.closeQuietly(fis);
        }

        if (srcFile.length() != destFile.length()) {
            throw new IOException("Failed to copy full contents from '" +
                    srcFile + "' to '" + destFile + "'");
        }
        if (preserveFileDate) {
            destFile.setLastModified(srcFile.lastModified());
        }
    }


    public static byte[] getFileByteData() {
        try{ 
            BufferedInputStream in = new BufferedInputStream(new FileInputStream(file));
            ByteArrayOutputStream out = new ByteArrayOutputStream(1024);               
            byte[] temp = new byte[1024];        
            int size = 0;        
            while ((size = in.read(temp)) != -1) {        
                out.write(temp, 0, size);        
            }        
            in.close();        
            byte[] fileContentByte = out.toByteArray();//  new String(content);
            return fileContentByte;
        }catch(Exception e){
            return null;
        }
    }

public static String getRawString() throws IOException{
    return new String(getFileByteData(),"ISO-8859-1");
}