用递归方法删除不为空的目录

If the directory is not empty, it is necessary to first recursivelydelete all files and subdirectories in the directory. Here is amethod that will delete a non-empty directory.

    // Deletes all files and subdirectories under dir.
    // Returns true if all deletions were successful.
    // If a deletion fails, the method stops attempting to delete and returns false.
    public static boolean deleteDir(File dir) {
        if (dir.isDirectory()) {
            String[] children = dir.list();
            for (int i=0; i<children.length; i++) {
                boolean success = deleteDir(new File(dir, children[i]));
                if (!success) {
                    return false;
                }
            }
        }
    
        // The directory is now empty so delete it
        return dir.delete();
    }