Готова

src/main/java/com/example/demo/Controller/Controllers.java

@@ -0,0 +1,35 @@
+
+
+package com.example.demo.Controller;
+
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@CrossOrigin
+public class Controllers {
+    @GetMapping("/plus")
+    public @ResponseBody Integer Plus (@RequestParam (required = false, defaultValue = "0") int val1,
+                                       @RequestParam (required = false, defaultValue = "0") int val2){
+        return val1 + val2;
+    }
+
+    @GetMapping("/minus")
+    public @ResponseBody Integer Minus (@RequestParam (required = false, defaultValue = "0") int val1,
+                                        @RequestParam (required = false, defaultValue = "0") int val2){
+        return val1 - val2;
+    }
+
+    @GetMapping("/mult")
+    public @ResponseBody Integer Mult (@RequestParam (required = false, defaultValue = "0") int val1,
+                                       @RequestParam (required = false, defaultValue = "0") int val2){
+        return val1 * val2;
+    }
+
+    @GetMapping("/div")
+    public @ResponseBody Integer Div (@RequestParam (required = false, defaultValue = "0") int val1,
+                                      @RequestParam (required = false, defaultValue = "1") int val2){
+        return val1 / val2;
+    }
+
+
+}

src/main/java/com/example/demo/Controller/Main.java

@@ -1,17 +0,0 @@
-package com.example.demo.Controller;
-
-
-import org.springframework.stereotype.Controller;
-import org.springframework.ui.Model;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestParam;
-
-@Controller
-public class Main {
-
-    @GetMapping
-    public String helloWorld(@RequestParam(name = "name", required = false, defaultValue = "World") String name, Model model){
-        model.addAttribute( "name", name);
-        return "hello-world!";
-    }
-}