Добавлен сервис и контроллер для QR кода

src/main/java/com/example/onomatopoeiaback/controller/QrCodeController.java

@@ -0,0 +1,23 @@
+package com.example.onomatopoeiaback.controller;
+
+import com.example.onomatopoeiaback.domain.qrcode.QrCode;
+import com.example.onomatopoeiaback.service.QrCodeService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/qr_code")
+public class QrCodeController {
+    final
+    QrCodeService qrCodeService;
+
+    public QrCodeController(QrCodeService qrCodeService) {
+        this.qrCodeService = qrCodeService;
+    }
+
+    public ResponseEntity<QrCode> createQrCode(@RequestParam String name) {
+        return ResponseEntity.ok(qrCodeService.createQrCode(name));
+    }
+}

src/main/java/com/example/onomatopoeiaback/service/QrCodeService.java

@@ -0,0 +1,13 @@
+package com.example.onomatopoeiaback.service;
+
+import com.example.onomatopoeiaback.domain.qrcode.QrCode;
+import org.springframework.stereotype.Service;
+
+@Service
+public class QrCodeService {
+    public QrCode createQrCode(String name) {
+        QrCode qrCode = new QrCode();
+        qrCode.setName(name);
+        return qrCode;
+    }
+}