增加上传和获取定位接口

src/main/java/com/onekeycall/videotablet/service/DeviceLocationService.java

@@ -0,0 +1,29 @@
+package com.onekeycall.videotablet.service;
+
+import com.onekeycall.videotablet.entity.DeviceLocation;
+import com.onekeycall.videotablet.repository.DeviceLocationRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class DeviceLocationService {
+    private final DeviceLocationRepository deviceSnRepository;
+
+    @Autowired
+    public DeviceLocationService(DeviceLocationRepository deviceSnRepository) {
+        this.deviceSnRepository = deviceSnRepository;
+    }
+
+    public DeviceLocation getDeviceLocation(String sn) {
+       return deviceSnRepository.findBySn(sn);
+    }
+
+    public boolean isExist(String sn) {
+        return deviceSnRepository.existsBySn(sn);
+    }
+
+    public void save(DeviceLocation deviceLocation) {
+        deviceSnRepository.save(deviceLocation);
+    }
+
+}