json转对象

JSON.parseObject方法可以实现json转化为对象

public class Test1 {
    public static void main(String[] args) {
        String jsonStr = "{\n" +
                " \"code\": \"200\",\n" +
                " \"data\": [\n" +
                "        {\n" +
                "            \"questionId\": \"1\",\n" +
                "            \"index\": \"50.0\",\n" +
                "\t    \"optionProportionList\": [\n" +
                "                {\n" +
                "                    \"optionId\": \"1\",\n" +
                "                    \"optionProportion\": \"0.2\"\n" +
                "                },\n" +
                "                {\n" +
                "                    \"optionId\": \"2\",\n" +
                "                    \"optionProportion\":\"0.2\"\n" +
                "                }\n" +
                "            ]\n" +
                "        }\n" +
                "\t]\n" +
                "}";
        J1 j1 = JSON.parseObject(jsonStr, J1.class);
         /**List<J2> j2List = j1.getData();
        for (J2 list1 : j2List) {
            List<J3> optionProportionList = list1.getOptionProportionList();
            System.out.println(optionProportionList);
           JSONArray jsonArray = JSONArray.parseArray(JSON.toJSONString(optionProportionList));
            System.out.println(jsonArray);*/

        }
    }
}

结果如下：

复制的json到Java实体对象生成可以借助这个网站：[https://www.json.cn/json/json2csharp.html]