How I create an error handler (404, 500…) in Spring Boot/MVC

Question

For some hours I\'m trying to create a custom global error handler in Spring Boot/MVC. I\'ve read a lot of articles and nothing.

That is my error class:

Answer 1

Hope this will help: Create a class say: NoProductsFoundException that extends runtimexception.

    import org.springframework.http.HttpStatus;
    import org.springframework.web.bind.annotation.ResponseStatus;

    @ResponseStatus(value=HttpStatus.NOT_FOUND, reason="No products found under this category")
    public class NoProductsFoundException extends RuntimeException{

    private static final long serialVersionUID =3935230281455340039L;
    }

Then in your productcontroller:

    @RequestMapping("/{category}")
    public String getProductsByCategory(Model
    model,@PathVariable("category") String category) {

   List products = productService.getProductsByCategory(category);

   if (products == null || products.isEmpty()) {
   throw new NoProductsFoundException ();
   }
   model.addAttribute("products", products);
   return "products";
}