MatrixVariableController.java

@RestController
@RequestMapping("/coffees")
public class CoffeeController {

    @GetMapping("/{criteria}/details/{details}/reviews")
    public String getCoffeeDetailsAndReviews(@MatrixVariable(pathVar = "criteria") Map<String, String> criteriaMatrixVars,
                                             @MatrixVariable(pathVar = "details") Map<String, String> detailsMatrixVars) {
        String roast = criteriaMatrixVars.get("roast");
        String origin = criteriaMatrixVars.get("origin");
        String flavor = criteriaMatrixVars.get("flavor");
        String brand = detailsMatrixVars.get("brand");

        return "Fetching details and reviews for " + roast + " roast coffee from " + origin + " with " + flavor + " flavor, brand: " + brand + ".";
    }
}