java - 根据 FieldNamingPolicy 重命名 GSON 中的映射键

Question

假设我正在像这样构建我的 GSON 对象

new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).create();

现在我想反序列化以下 JSON

{
    "MyMap" : {
        "Key1" : "Foo",
        "Key2" : "Bar"
    }
}

进入下面的类(运行良好)

public class MapClass {
    Map<String,String> myMap;
}

但我也希望将键命名为“key1”和“key2”。我该怎么办？

Answer 1

你可以这样尝试:

try {
            JSONObject jObj = new JSONObject("{"
                    + "    \"MyMap\" : {"
                    + "        \"Key1\" : \"Foo\","
                    + "        \"Key2\" : \"Bar\""
                    + "    }"
                    + "}"); // this parses the json
            JSONObject jObjt = jObj.getJSONObject("MyMap");

           //old version with out GSON
            Map<String, String> map = new HashMap();
            Iterator itr = jObjt.keys();
            while (itr.hasNext()) {
                String key = (String) itr.next();
                String value = jObjt.getString(key);
                map.put(key, value);
            }

           //desalinized one with GSON             
           Map<String, String> map1 = new Gson().fromJson(jObjt.toString(), HashMap.class);
           for (String str : map1.keySet()) {
                System.out.println("k:" + str + " v:" + map1.get(str));
           }


        } catch (JSONException ex) {
           //log the error
    }