java - 如何在 Android 中借助 DTO 解析此内容

Question

如何在android中解析这个JSON，我尝试使用这个DTO

private Map<String , Map<String, String>> airlines;
private Map<String , Map<String, String>> airports;
private Map<String , Map<String, String>> providers;

但它给出了一个异常:-，无法构造 java.util.LinkedHashMap 的实例(尽管至少存在一个 Creator):没有字符串参数构造函数/工厂方法来从字符串值反序列化( “香料航空”)

    "airlines": {
      "SG": "Spicejet",
      "AI": "Air India",
      "G8": "Go Air",
      "9W": "Jet Airways",
      "6E": "Indigo"
    },
    "airports": {
      "DEL": "New Delhi",
      "BOM": "Mumbai"
    },
    "providers": {
      "1": "MakeMyTrip",
      "2": "Cleartrip",
      "3": "Yatra",
      "4": "Musafir"
    }

Answer 1

Map在 json 字段(航空公司、机场、提供商)中保存键/对值和值。可以解析为Map<String, String>直接地。因此，只需将字段类型更改为 Map<String, String> :

private Map<String, String> airlines;
private Map<String, String> airports;
private Map<String, String> providers;