I have a web system made in java, in which it is merged with strut, so that each page goes through strut and redirects without recharging its main menu, unlike the typical web pages that reload a new page every time.
Now I need to transfer that system to Bootstrap and I have a template purchased for it, but I do not know how to integrate this, since bootstrap reloads each new page, and each page contains the same repeated menu. That's why I'm seeing how to generate a single page with the menu or elements in common and call them in the JSP through includes, but the big problem is that I do not know how to fit them on the page (the menu is on the left and do not overlap the main screen), so when entering a screen from the menu, this menu loads the JSP, but this JSP has the same menu included through the well-organized includes.
Who could give me an idea of that? Or maybe a better alternative? Thank you very much!