java比较文件和文件夹

用到了apache的commons-codec-1.7.jar包, 用于比较文件的md5值

代码如下

	public static boolean compareFolder(File file1, File file2) {

		if (file1 == null || file2 == null) {
			return false;
		}

		if (!file1.isDirectory() || !file2.isDirectory()) {
			return false;
		}

		File[] listFiles1 = file1.listFiles();
		File[] listFiles2 = file2.listFiles();

		int fileCount1 = listFiles1.length;
		int fileCount2 = listFiles2.length;

		if (fileCount1 != fileCount2) {
			return false;
		}

		for (int i = 0; i < fileCount1; i++) {
			if (listFiles1[i].isFile() && listFiles2[i].isDirectory()) {
				return false;
			} else if (listFiles1[i].isDirectory() && listFiles2[i].isFile()) {
				return false;
			} else if (listFiles1[i].isFile() && listFiles2[i].isFile()) {
				if (!compareFile(listFiles1[i], listFiles2[i])) {
					return false;
				}
			} else if (listFiles1[i].isDirectory()
					&& listFiles2[i].isDirectory()) {
				if (!compareFolder(listFiles1[i], listFiles2[i])) {
					return false;
				}
			}
		}

		return true;

	}

	public static boolean compareFile(File file1, File file2) {

		if (file1 == null || file2 == null) {
			return false;
		}

		if (!file1.isFile() || !file2.isFile()) {
			return false;
		}

		try {
			FileInputStream fis1 = new FileInputStream(file1);
			FileInputStream fis2 = new FileInputStream(file2);
			String md5Hex1 = DigestUtils.md5Hex(fis1);
			String md5Hex2 = DigestUtils.md5Hex(fis2);

			if (md5Hex1.equals(md5Hex2)) {
				return true;
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return false;
	}