Every application has a chance of encountering an error, even if it is an extremely robust application. So, designing custom error pages is important for any enterprise application. Spring Boot applications provide a default error page. You can see one in the following screenshot:
But if you want to use a custom error page for a given status code, you can add a file to the /error folder. You can create a custom error page by using static HTML, FreeMarker, Velocity, Thymeleaf, JSP, and so on. The name of the file should be the exact status code or a series mask.
Let's see the following image to map 404 to ...
