私はcsvファイルを持っているし、Java

Question

>CSVでCSVのみとめ列を使用してグループ化することにより、JSONオブジェクトを形成したかったがルックス：で（、）

Col_1 Col_2 Col_5 Col_6 

    1 YYY1 1111 CDX00001 
    1 YYY2 1111 CDX00001 

    2 YYY3 3333 CDX00002 

    2 YYY4 2222 CDX00001 

    2 YYY5 3333 CDX00002 
    2 YYY6 3333 CDX00002 
    2 YYY7 3333 CDX00002 
    2 YYY8 4444 CDX00002 
    2 YYY9 4444 CDX00002 

値をsperated> **私はへのコードの下に使用グループ2の列とJSONの結果は次のようになります。

 "CDX00002$@4444": [ 
     { 
      "Col_5": "4444", 
      "Col_6": "CDX00002", 
      "Col_1": "2", 
      "Col_2": "YYY8" 
     }, 
     { 
      "Col_5": "4444", 
      "Col_6": "CDX00002", 
      "Col_1": "2", 
      "Col_2": "YYY9" 
     } 
     ], 
     "CDX00002$@3333": [ 
     { 
      "Col_5": "3333", 
      "Col_6": "CDX00002", 
      "Col_1": "2", 
      "Col_2": "YYY3" 
     }, 
     { 
      "Col_5": "3333", 
      "Col_6": "CDX00002", 
      "Col_1": "2", 
      "Col_2": "YYY5" 
     }, 
     { 
      "Col_5": "3333", 
      "Col_6": "CDX00002", 
      "Col_1": "2", 
      "Col_2": "YYY6" 
     }, 
     { 
      "Col_5": "3333", 
      "Col_6": "CDX00002", 
      "Col_1": "2", 
      "Col_2": "YYY7" 
     } 
     ], 
     "CDX00001$@1111": [ 
     { 
      "Col_5": "1111", 
      "Col_6": "CDX00001", 
      "Col_1": "1", 
      "Col_2": "YYY1" 
     }, 
     { 
      "Col_5": "1111", 
      "Col_6": "CDX00001", 
      "Col_1": "1", 
      "Col_2": "YYY2" 
     }, 
     { 
      "Col_5": "1111", 
      "Col_6": "CDX00001", 
      "Col_1": "2", 
      "Col_2": "YYY10" 
     } 
     ], 
     "CDX00001$@2222": [ 
     { 
      "Col_5": "2222", 
      "Col_6": "CDX00001", 
      "Col_1": "2", 
      "Col_2": "YYY4" 
     } 
     ] 
    } 

>コードを使用：

   Map namesByCompany = list.stream() 
          .collect(Collectors.groupingBy(item->item.get("Col_6") +"$@"+item.get("Col_5"),Collectors.toList())); 

      Gson gson = new GsonBuilder().setPrettyPrinting().create(); 
      System.out.println("--result---"+gson.toJson(namesByCompany)); 

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詳細：

But problem here my groupBy columns is dynamic and cannot be hard coded as above, If we get another one columns then JSON should be prepared by considering new Groupby as well. I need to prepare a JSON from CSV somehow using dynamic gorupby columns. I tried in java but if you any other tools or coding please post here . Thanks in advance 

Answer 1

すべての行が一つのグループがある場合は、缶ジュース他の '、'が見つからなくなるまで、そのグループのJSONにグループを追加します。