Service层实现

src/main/java/com/example/springdemo/service/MerchantsService.java

@@ -0,0 +1,9 @@
+package com.example.springdemo.service;
+
+import com.example.springdemo.dao.MerchantsRepository;
+import org.springframework.stereotype.Service;
+
+@Service
+public interface MerchantsService extends MerchantsRepository {
+
+}