使用的JSON字符串：

'{"Sensors":[{\"name\":\"BLRB50CM_A\",\"cameraId\":\"Cam10\",\"id\":1,\"resolution\":\"1280 x 720\",\"officeLocation\":\"Offshore Development Center\",\"tags\":\"Entrance Camera, Parking Lot\",\"isActive\":\"true\",\"hls\":\"https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8\",\"rtsp\":\"rtsp://10.66.102.66:32278/mystream/parking_lot\",\"type\":\"sensor\",\"inputs\":[],\"outputs\":[2]}]}'

Java pojo类：

public class ServiceFlowData {

    public ArrayList<Sensor> sensors;

    public ArrayList<Sensor> getSensors() {
        return sensors;
    }

    public void setSensors(ArrayList<Sensor> sensors) {
        this.sensors = sensors;
    }
}

用于转换为java对象的代码

Gson gson = new Gson();
ServiceFlowData serviceFlowData = gson.fromJson(jsonString,ServiceFlowData.class);
System.out.println("serviceFlowData"+serviceFlowData.getSensors());

我正在获取传感器为空。
我在这里缺少什么？