Android Kotlin + Klaxon-解析JSON根数组 [英] Android Kotlin + Klaxon - Parsing a JSON root array

问题描述

我有一个带有根数组的JSON资产:

I have a JSON asset with a root array:

[
  {
    "word": "word",
    "label": "label"
  },
  {
    "word": "word2",
    "label": "label2"
  }
]

我正在尝试使用Klaxon对其进行解析.

I'm trying to parse it using Klaxon.

到目前为止，我已经尝试了几种方法:

So far I have tried several methods:

val wordDict = Klaxon().parse<List<DictWord>>( activity.assets.open("dict.json") )

val wordDict = Klaxon().parse<Array<DictWord>>( activity.assets.open("dict.json") )

val wordDict = Klaxon().parse<JsonArray<DictWord>>( activity.assets.open("dict.json") )

导致空列表或异常:

java.lang.ClassCastException:com.beust.klaxon.JsonArray不能是 转换为com.beust.klaxon.JsonObject

java.lang.ClassCastException: com.beust.klaxon.JsonArray cannot be cast to com.beust.klaxon.JsonObject

我在做什么错了?

推荐答案

在Klaxon的GitHub问题板上找到了答案:

Found the answer in Klaxon's GitHub issue board: https://github.com/cbeust/klaxon/issues/87

数组解析是通过parseArray()完成的，因此解决方法是:

Array parsing is done via parseArray(), so the fix was:

val wordDict = Klaxon().parseArray<DictWord>( activity.assets.open("dict.json") )

值得一提的是，仅通过流API而不是对象映射API支持数组解析.因此，我们只能提供InputStream或String作为参数.

It is worth mentioning that array parsing is only supported via the streaming API, not the object mapping API. So we are limited to either supplying an InputStream or a String as an argument.

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