Learn how to use the open source FreeMarker template engine as a more flexible alternative to JavaServer Pages in your MVC Web applications.

About How we can preform Servlet / JSP File Upload/Download with Maven Repository ...

A JSP’s include directive includes the content of a specified file in that JSP. Use the include mechanism for situations when text, such as ASCII or HTML, needs to be included in multiple JSPs.

I've written this blog to get the detail about Login module. To override a JSP you have to create a 'Liferay Workspace Project' and a module to override JSP. Follow this blog to create a module ...

Open a text editor and load an existing JSP file or create a new one from a barebones HTML template. A JSP file has the same structure as an HTML file, with extra embedded commands between "" tags.

Right-click the JSP file you want to edit and select "Open With." Click the JSP editor you want to use to edit your code. Add the imported namespace at the top of your code.