Hands-On Spring Security 5 for Reactive Applications

Step 8—Controller setup

Let's create a base controller (HomeController) for the secured JSP page (home.jsp). Please note that the return of the mapping method should be a string, and it should map to the actual name of the JSP file. In our case, it is home.jsp, a secured resource that the caller navigates when they log in:

@Controllerpublic class HomeController {   @GetMapping("/")   public String home(Model model, Principal principal) {       if(principal != null)           model.addAttribute("msg", "Welcome " + principal.getName());       return "home";   }}