diff --git a/src/main/java/com/example/springdemo/service/MerchantsService.java b/src/main/java/com/example/springdemo/service/MerchantsService.java
index 9c98c6f..ef3b502 100644
--- a/src/main/java/com/example/springdemo/service/MerchantsService.java
+++ b/src/main/java/com/example/springdemo/service/MerchantsService.java
@@ -1,9 +1,20 @@
 package com.example.springdemo.service;
 
-import com.example.springdemo.dao.MerchantsRepository;
-import org.springframework.stereotype.Service;
+import com.example.springdemo.entities.Merchants;
 
-@Service
-public interface MerchantsService extends MerchantsRepository {
+import java.util.List;
+import java.util.Optional;
 
+public interface MerchantsService {
+    Merchants insetMerchants(Merchants merchant);
+
+    void deleteMerchantsById(Long id);
+
+    Merchants updateMerchants(Merchants merchant);
+
+    List<Merchants> findAllMerchants();
+
+    Optional<Merchants> findById(Long id);
+
+    Merchants findByName(String name);
 }
diff --git a/src/main/java/com/example/springdemo/service/MerchantsServiceImpl.java b/src/main/java/com/example/springdemo/service/MerchantsServiceImpl.java
new file mode 100644
index 0000000..da5d3de
--- /dev/null
+++ b/src/main/java/com/example/springdemo/service/MerchantsServiceImpl.java
@@ -0,0 +1,45 @@
+package com.example.springdemo.service;
+
+import com.example.springdemo.dao.MerchantsRepository;
+import com.example.springdemo.entities.Merchants;
+import jakarta.annotation.Resource;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class MerchantsServiceImpl implements MerchantsService {
+    @Resource
+    private MerchantsRepository merchantsRepository;
+
+    @Override
+    public Merchants insetMerchants(Merchants merchant) {
+        return merchantsRepository.save(merchant);
+    }
+
+    @Override
+    public void deleteMerchantsById(Long id) {
+        merchantsRepository.deleteById(id);
+    }
+
+    @Override
+    public Merchants updateMerchants(Merchants merchant) {
+        return merchantsRepository.save(merchant);
+    }
+
+    @Override
+    public List<Merchants> findAllMerchants() {
+        return merchantsRepository.findAll();
+    }
+
+    @Override
+    public Optional<Merchants> findById(Long id) {
+        return merchantsRepository.findById(id);
+    }
+
+    @Override
+    public Merchants findByName(String name) {
+        return merchantsRepository.findByName(name);
+    }
+}