JsonNode jsonNode={"device": {}, "customer_code": "a573aecc-03c6-472a-b2b9-4704ec9f3a92", "connector_list": "dz-connector-datadog", "configuration_id": "8cf91f32-7ce2-4111-9737-543d3ec787ae", "dz_app": "true", "video": {}}jsonNode.get("device")返回{}。我需要检查设备是否有值
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