使用GSON库将JSON转换为映射

Question

我希望将JSON响应转换为Map，使用GSON库获得所需输出的最佳方法是什么。

我尝试这个，我只得到ArrayList值。

Map<String, Object> map = gson.fromJson(response, HashMap.class);
ArrayList responseOptions = (ArrayList) map.get("data");

产出：

[{language=Java, value=8}, {language=Ruby, value=7}, {language=Python, value=7}]

示例JSON响应

{
    "data":[
    {
    "language":"Java","value":"8"
    },
    {
    "language":"Ruby","value":"7"
    },
    {
    "language":"Python","value":"6"
    }]
}

映射{Java=8、Ruby=7、Python=6}中的期望输出

Answer 1

测试代码

    String str = "{\n" +
            "    \"data\":[\n" +
            "    {\n" +
            "    \"language\":\"Java\",\"value\":\"8\"\n" +
            "    },\n" +
            "    {\n" +
            "    \"language\":\"Ruby\",\"value\":\"7\"\n" +
            "    },\n" +
            "    {\n" +
            "    \"language\":\"Python\",\"value\":\"6\"\n" +
            "    }]\n" +
            "}";
    Map map = new Gson().fromJson(str, Map.class);
    List data = (List) map.get("data");
    Map<String, String> result = new HashMap<>();
    for (Object o : data) {
        Map m = (Map) o;
        result.put(m.get("language").toString(), m.get("value").toString());
    }
    System.out.println(result);

测试结果

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