多文件无刷新上传源代码 利用Ajax实现多文件无刷新上传，可以无限制增加上传文件的数量，并可以在线控制是否显示图片等 上传图片按日期进行分类存储-Multi-file upload without refresh the source code to use Ajax without refreshing the realization of multi-file upload, you can upload unlimited increase in the quantity,