{ "id": 1001, "type": "donut", "name": "Cake", "description": "https://www.jq22.com", "price": 2.55, "available": { store: 42, warehouse: 600 }, "topping": [ { "id": 5001, "type": "None" }, { "id": 5002, "type": "Glazed" }, { "id": 5005, "type": "Sugar" }, { "id": 5003, "type": "Chocolate" }, { "id": 5004, "type": "Maple" } ] } 收缩所有的节点 为Key添加双引号