An HTML element is an individual component of an HTML (Hypertext Markup Language) document or web page.[ vague] HTML is composed of a tree of HTML nodes, such as text nodes. In this example, we are going to learn about uploading and downloading of a file through JSP. File Input output are very important operations. Here we are going to read and write a file using JSP. Ruby on Rails - File Uploading - You may have a requirement in which you want your site visitors to upload a file on your server. Rails makes it very easy to handle this requirement. When uploading a main web site for each directory remember to name it index.html. Advanced users may utilize PHP files, shtml files, etc. If your web site is not based in html, then make sure your main files are renamed index.extension… If you have already uploaded a file and you are uploading an updated version, you must check “Overwrite Existing File” or it will not update the file.