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マクロでjsonデータを作ってみる

Last updated at Posted at 2023-03-04
Sub Macro1()

    '型定義
    Dim wb As Workbook
    Dim ws As Worksheet
    Dim startDt As Date
    Dim endDt As Date
    Dim countd As Integer
    Dim timestamp As String
    Dim A As String
    Dim B As String
    Dim C As String
    Dim K As String
    Dim jsonData As String
    Dim jsonOutput As String
    Dim jsonList As String
    
    Set wb = ThisWorkbook
    Set ws = wb.Sheets("Sheet1")
    
    '日付範囲の設定 CDate = 文字列2023/2/2をDate型に変換
    startDt = CDate(ws.Range("B1").Value)
    endDt = CDate(ws.Range("C1").Value)
    
    'JSONデータの生成
    For D = startDt To endDt '(例: 2023/2/2~2023/2/5)分ループ
        'データの取得
        timestamp = Format(D, "yyyymmdd")
        A = ws.Range("B2").Value
        B = ws.Range("B3").Value
        C = ws.Range("B4").Value
        K = ws.Range("B6").Value
        countd = ws.Range("B5").Value 'ネストJSON数
        
        'JSONデータの生成
        jsonList = ""
        If countd > 0 Then
            For i = 1 To countd
                jsonList = jsonList & """count" & i & """:{""あいう"": " & K & "}"
                If i < countd Then
                    jsonList = jsonList & "," 'jsonList生成した"count1": {"K": 4000}を「,」で繋ぐ
                End If
            Next i
            jsonList = """list"": {" & jsonList & "}" '"count1": {"あいう": 4000},"count2": {"あいう": 4000}
        Else
            jsonList = """list"": {""number"": 0, ""D"": " & D & "}"  '←無くても良い。
        End If
        
        '取得したデータまとめる
        jsonData = "{""timeStamp"": " & timestamp & ", ""A"": " & A & ", ""B"": " & B & ", ""C"": " & C & ", " & jsonList & "}"
        
        'JSONデータを配列に追加
        jsonOutput = jsonOutput & jsonData
        If D < endDt Then
            jsonOutput = jsonOutput & ","
        End If
    Next D 'ループ終了
    
    'JSONデータの出力
    Open "C:\Users\socia\OneDrive\デスクトップ\output.json" For Output As #1
    Print #1, "[" & jsonOutput & "]"
    Close #1
    MsgBox "JSONデータ生成完了"
End Sub



スクリーンショット 2023-03-04 095732.png

意味

■ For Next
For カウンタ名 = 初期値 To 到達値
    処理
Next カウンタ名
→
JavaScript:
 var startDate = new Date("2023-02-01");
 var endDate = new Date("2023-02-03");
 for (var d = startDate; d < endDate; d.setDate(d.getDate() + 1)) {
   console.log(d.getFullYear() + '/' + (d.getMonth() + 1) + '/' + d.getDate());
 }

■ if For
→B5セルの入力値が0より大きければ、ループ(For)する。
 →1~カウント数分ループ。
 If countd > 0 Then
  For i = 1 To countd
    ~~~~~~
  Next i
 End If

■ jsonData = 
→ネストjson作成のため、親objとその中で生成される子objを1つのjsonに連結するため。
{"timeStamp":20230202,
 "A":1000,
 "B":2000,
 "C":3000,
 "list":{
   "count1":{"あいう":4000},
      "count2":{"あいう":4000}
     }
}

■ jsonOutput = jsonOutput & jsonData
→jsonDataと同様に、jsonDataは各日付毎に親と子objを連結して1日単位で1つのjsonを生成していました。
 jsonOutputでは、jsonDataで1日単位のjsonを連結して範囲内の日付を連結した1つのjsonを生成します。
→例:
    {
        "timeStamp": 20230201,
    ~~~~~~
    },
    {
        "timeStamp": 20230202,
       ~~~~~~~~
    },

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