src/main/java/com/campus/water/service/DeviceStatusServiceImpl.java

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+package com.campus.water.service;
+
+import com.campus.water.entity.Device;
+import com.campus.water.entity.dto.request.DeviceStatusUpdateRequest;
+import com.campus.water.mapper.DeviceRepository;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Map;
+
+// 核心：添加@Service注解，让Spring注册这个实现类为Bean
+@Service
+@RequiredArgsConstructor // 注入Repository等依赖
+@Slf4j
+public class DeviceStatusServiceImpl implements DeviceStatusService {
+
+    // 注入设备仓库（根据你的业务逻辑补充依赖）
+    private final DeviceRepository deviceRepository;
+
+    // 实现接口的所有方法（以下是示例实现，你需根据业务逻辑完善）
+    @Override
+    public boolean updateDeviceStatus(DeviceStatusUpdateRequest request) {
+        // 示例逻辑：根据request更新设备状态
+        Device device = deviceRepository.findById(request.getDeviceId()).orElse(null);
+        if (device == null) {
+            log.warn("设备不存在 | 设备ID：{}", request.getDeviceId());
+            return false;
+        }
+        device.setStatus(request.getStatus());
+        device.setRemark(request.getRemark());
+        deviceRepository.save(device);
+        return true;
+    }
+
+    @Override
+    public boolean markDeviceOnline(String deviceId) {
+        // 实现标记设备在线的逻辑
+        Device device = deviceRepository.findById(deviceId).orElse(null);
+        if (device == null) return false;
+        device.setStatus(Device.DeviceStatus.valueOf("online")); // 对应你的Device枚举/字符串
+        deviceRepository.save(device);
+        return true;
+    }
+
+    @Override
+    public boolean markDeviceOffline(String deviceId, String reason) {
+        // 实现标记设备离线的逻辑
+        Device device = deviceRepository.findById(deviceId).orElse(null);
+        if (device == null) return false;
+        device.setStatus(Device.DeviceStatus.valueOf("offline"));
+        device.setRemark(reason);
+        deviceRepository.save(device);
+        return true;
+    }
+
+    @Override
+    public boolean markDeviceFault(String deviceId, String faultType, String description) {
+        // 实现标记设备故障的逻辑
+        Device device = deviceRepository.findById(deviceId).orElse(null);
+        if (device == null) return false;
+        device.setStatus(Device.DeviceStatus.valueOf("fault"));
+        device.setRemark("故障类型：" + faultType + "，描述：" + description);
+        deviceRepository.save(device);
+        return true;
+    }
+
+    @Override
+    public boolean batchUpdateDeviceStatus(List<String> deviceIds, String status, String remark) {
+        // 实现批量更新设备状态的逻辑
+        List<Device> devices = deviceRepository.findAllById(deviceIds);
+        devices.forEach(device -> {
+            device.setStatus(Device.DeviceStatus.valueOf(status));
+            device.setRemark(remark);
+        });
+        deviceRepository.saveAll(devices);
+        return true;
+    }
+
+    @Override
+    public List<Device> getDevicesByStatus(String status, String areaId, String deviceType) {
+        // 实现按状态/区域/设备类型查询设备的逻辑
+        // 可调用DeviceRepository的自定义查询方法
+        return deviceRepository.findByStatusAndAreaIdAndDeviceType(status, areaId, deviceType);
+    }
+
+    @Override
+    public Map<String, Object> getDeviceStatusCount(String areaId, String deviceType) {
+        // 实现统计各状态设备数量的逻辑
+        // 示例：返回online/offline/fault的数量
+        return Map.of(
+                "online", deviceRepository.countByStatusAndAreaIdAndDeviceType("online", areaId, deviceType),
+                "offline", deviceRepository.countByStatusAndAreaIdAndDeviceType("offline", areaId, deviceType),
+                "fault", deviceRepository.countByStatusAndAreaIdAndDeviceType("fault", areaId, deviceType)
+        );
+    }
+
+    @Override
+    public List<Device> getOfflineDevicesExceedThreshold(Integer thresholdMinutes, String areaId) {
+        // 实现获取超过阈值的离线设备的逻辑
+        // 需结合设备最后心跳时间判断
+        return List.of(); // 临时返回空，需完善
+    }
+
+    @Override
+    public void autoDetectOfflineDevices(Integer thresholdMinutes) {
+        // 实现自动检测离线设备的逻辑
+        // 定时任务/扫描逻辑，需完善
+    }
+}