将JSON转换为CSV

Question

我有以下格式的JSON,我正在尝试写入CSV:

{
    "results": [{

            "geo_position": {
                "Field1": 11,
                "Filed2": 12
            },
            "Field3": 13,
            "Filed4": 14,
            "Field5": 15
        },

        {
            "geo_position": {
                "Field1": 21,
                "Filed2": 22
            },
            "Field3": 23,
            "Filed4": 24,
            "Filed5": 25
        }
    ]
}

---

我期待输出像:

field1,field2,field3,field4,field5
11,12,13,14,15
21,22,23,24,25

---

我得到输出CSV如下:

    geo_position,field3,field4,field5
   {Field1:11,Field2:12}, 13,14,15
   {Field2:21,Field2:22},23,24,25

---

我的java代码:

JSONObject jsonObj = new JSONObject(jsonArray);
System.out.println(jsonObj);
JSONArray docs = jsonObj.getJSONArray("results");
File file=new File("C:/fromJSON2.csv");
String csv = CDL.toString(docs);
FileUtils.writeStringToFile(file, csv);

有人可以帮我弄清楚为什么我会采用不同的格式.我应该怎么做以达到我期望的格式？

Answer 1

你的 JSON 结构是

{
"results":
[
    {
        "geo_position": {"Field1":11,"Filed2":12},
        "Field3":13,
        "Filed4":14,
        "Field5":15
    },

    {
        "geo_position":{"Field1":21,"Filed2":22},
        "Field3":23,
        "Filed4":24,
        "Filed5":25
    }

]
}

为了让它按照你想要的方式工作，它应该是这样的：

{
"results":
[
    {
        "Field1":11,
        "Filed2":12,
        "Field3":13,
        "Filed4":14,
        "Field5":15
    },

    {
        "Field1":21,
        "Filed2":22,
        "Field3":23,
        "Filed4":24,
        "Filed5":25
    }

]
}

你可以做什么

for(int i = 0; i<resultsJSONArray.length(); ++i){ 
    if(resultsJSONArray.get(i).has("geo_position")) {
          String names[] = JSONObject.getNames(resultsJSONArray.get(i).get("geo_position")));
          for(int i = 0; i<names().length; ++i) {                                       
              resultsJSONArray.get(i).put(names[i],resultsJSONArray.get(i).get("geo_position").get(names[i]));
          }
          JSONObject.getNames(resultsJSONArray.get(i).remove("geo_position"));
    }
}