1.在外存创建多目录文件夹时,需要一级一级创建,否则创建无效.
</pre><pre name="code" class="java">/**
     * Create folder
     * @param path  folder path
     */
    public static void createDir(String path){
        File filePath = new File(path);
        if (!filePath.exists()) {
            filePath.mkdir();
        }
    }</pre><pre name="code" class="java">createDir(parentPath); createDir(childPath);