在一些论坛上看到有些朋友想学习研究下上传系统，尤其是批量上传系统并且写入数据库保存的功能。因此自己闲来写了一个供大家学习参考之用。-Seen on some forums and some friends want to upload system under study and research, especially in bulk upload into the system and save functions. So free yourself to write a referenc