Struts2的文件上传实例，里面有两种上传方式。自己看吧-Struts2 file upload instances, there are two kinds of uploads. See for yourself

自己写的实现文件上传功能，适合初学者学习,总之自己看代码吧，我把需要的jar包都放进去了-Write your own file upload function, suitable for beginners to learn, in short, look at the code it, I need to go into the jar packages

文件上传时将客服端文件上传到服务器，文件下载是将服务器文件下载到客服端。主要利用FileUpdate控件来实现。-When the customer service side file upload upload files to the server, the file download is download the file to the server, client service. The main advantage of FileUpdate controls to achieve