扩展开发功能列表：
1.双击文件列表中的文件名，打开文件。
2.右击文件列表中的文件名，弹出消息框显示文件信息（完整文件名路径，文件大小，文件的创建时间）
3.提供第五个选项：是否遍历文件夹的子文件夹。如果遍历，则子文件夹中的文件也会被处理，否则不处理子文件夹的文件。
4.批量替换中，提供指定字符位置的单个字符的替换，比如3bd343.jpg，指定位置为0，替换后的字符为2015，替换后就是2015bd343，而后面的位置的3则不会被替换。(Extended development function list:
1. double click the file name in the file list and open the file.
2. right - click the file name in the file list, the pop-up message box displays the file information (the full file name path, the file size, the file creation time)
3. provides fifth options: whether or not to traverse the subfolder of the folder. If traversing, the file in the subfolder is also processed, otherwise the file of the subfolder will not be processed.
4., in batch replacement, the replacement of a single character with the specified character position, such as 3bd343.jpg, the specified location is 0, the replacement character is 2015, the replacement is 2015bd343, and the 3 of the latter position will not be replaced.)