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並前往https://www.fluttercampus.com/guide/306/convert-map-array-list-to-json-string/

How to Convert Map/Array List to JSON String in Flutter

var ages = {"John":26, "Krishna": 34, "Rahul":67, "Maichel": 33}; String jsonstringmap = json.encode(ages); print(jsonstringmap); //output: {"John":26 ...

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