JAVA读取文件夹大小的几种方法实例

import java.io.File;

public class TotalFileSizeSequential {

    public static String fileName = “C:\\Documents and Settings\\Administrator\\桌面\\monkeytalk”;

    // 递归方式 计算文件的大小
    private long getTotalSizeOfFilesInDir(final File file) {
        if (file.isFile())
            return file.length();
        final File[] children = file.listFiles();
        long total = 0;
        if (children != null)
            for (final File child : children)
                total += getTotalSizeOfFilesInDir(child);
        return total;
    }

    public static void main(final String[] args) {
        final long start = System.nanoTime();

        final long total = new TotalFileSizeSequential()
                .getTotalSizeOfFilesInDir(new File(fileName));
        final long end = System.nanoTime();
        System.out.println(“Total Size: ” + total);
  来源gaodaimacom搞#^代%!码&网      System.out.println(“Time taken: ” + (end – start) / 1.0e9);
    }
}