Java文件字节转B、KB、MB、GB、TB

    /**
     * 文件字节转B KB MB GB TB
     * @param size
     * @return
     */
    public static String readableFileSize(long size) {
        if (size <= 0) return "";
        final String[] units = new String[]{"B", "KB", "MB", "GB", "TB"};
        int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
        return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + units[digitGroups];
    }