计算文件大小

最新推荐文章于 2021-04-06 17:21:09 发布

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最新推荐文章于 2021-04-06 17:21:09 发布

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分类专栏： java

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FileUtils.fileSizeTransfer(FileUtils.getSize(filePath)));

public static long getSize(String filePathName) {
        if (isNullString(filePathName))
            return 0;
        File file = new File(filePathName);
        if (file.isFile())
            return file.length();
        return 0;
    }

public static String fileSizeTransfer(long fileSize) {
        String mFileSize;
        DecimalFormat df = new DecimalFormat("######0.00");
        double size = (double) fileSize;
        if (size > 1024 * 1024 * 1024) {
            size = size / (1024 * 1024 * 1024);
            mFileSize = df.format(size) + " G";
        } else if (size > 1024 * 1024) {
            size = size / (1024 * 1024);
            mFileSize = df.format(size) + " MB";
        } else if (size > 1024) {
            size = size / 1024;
            mFileSize = df.format(size) + " KB";
        } else {
            mFileSize = df.format(size) + " B";
        }

        return mFileSize;
    }