import json

data={
    "LED全彩显示屏": [],
    "控制盒及电源": [],
    "大屏播控系统": [],
    "配电柜(含PLC)": [],
    "交换机":["111","1111"],
    "钢结构底座及铝型材支架": [],
    "电缆及信号线缆": []
}
filtered_dict = {key: value for key, value in data.items() if value}
print(json.dumps(filtered_dict,ensure_ascii=False,indent=4))