dart JSON字符串转换为列表字符串 [英] dart JSON String convert to List String

问题描述

我有一个API，该API会按如下方式调用json字符串数组：

I have an API that calls the json String array as follows:

[
  "006.01.01",
  "006.01.01 1090",
  "006.01.01 1090 1090.950",
  "006.01.01 1090 1090.950 052",
  "006.01.01 1090 1090.950 052 A",
  "006.01.01 1090 1090.950 052 A 521219",
  "006.01.01 1090 1090.950 052 A 521219",
  "006.01.01 1090 1090.950 052 A 521219",
  "006.01.01 1090 1090.950 052 A 521219",
  "006.01.01 1090 1090.950 052 A 521219",
  "006.01.01 1090 1090.950 052 B",
  "006.01.01 1090 1090.950 052 B 521211",
  "006.01.01 1090 1090.950 052 B 521211",
  "006.01.01 1090 1090.994",
  "006.01.01 1090 1090.994 001",
  "006.01.01 1090 1090.994 001 A",
  "006.01.01 1090 1090.994 001 A 511111",
  "006.01.01 1090 1090.994 001 A 511111",
  "006.01.01 1090 1090.994 001 A 511111",
  "006.01.01 1090 1090.994 001 A 511111"
]

<我打算将json转换为List i飞镖。我尝试了以下脚本：

I intend to convert the json to the List in the dart. I tried the script below :

json.decode(response.body).cast<List<String>();

但没有用，脚本应该如何正确？

but it didn't work, how should the script be correct?

推荐答案

解析JSON列表的结果是 List< dynamic> 。 jsonDecode 的返回类型只是动态。

The result of parsing a JSON list is a List<dynamic>. The return type of jsonDecode is just dynamic.

您可以将这样的列表转换为 List< String> 作为

You can cast such a list to a List<String> as

List<String> stringList = (jsonDecode(input) as List<dynamic>).cast<String>();

您也可以将其用作 List< dynamic> ，然后将每个值分配给 String ：

You can also just use it as a List<dynamic> and then assign each value to String:

List<dynamic> rellyAStringList = jsonDecode(input);
for (String string in reallyAStringList) { ... }

效果大约是相同-从列表中取出每个元素时，将检查每个元素是否为字符串。

The effect is approximately the same - each element is checked for being a string when it is taken out of the list.

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