Flutter JSON字符串和Map类型的转换

一、Flutter Map转换成Json

 import 'dart:convert'
  Map userInfo={
    "username":"张三",
    "age":20
  };
  print(json.encode(userInfo));

二、36.1.2、Flutter Json转换成Map

String str='{"username":"张三","age":20}';
print(json.decode(str));

Map info=json.decode(str);
print(info["username"]);