通过对话框的两个按钮：Txt文件按钮和转换为Dat文件按钮，可选择需要转换的Txt文件，点击转换按钮便可实现文件的转换，点击退出可退出程序。-Through two buttons in the dialog: Txt file button and converted to Dat file button, can choose to convert Txt file, click the convert button can achieve file conversion, click ex