将JSON解析为Excel-LOOP [英] Parsing JSON to Excel - LOOP

问题描述

我有一个通过解析JSON获取历史股价的代码.我需要在特定日期获得平仓"价格.我需要代码从Excel单元格中读取日期，然后粘贴与该日期相对应的价格.这是一个示例:

I have a code that gets historical stock prices by parsing JSON. I need to get the "Close" price on a specific date. I need the code to read the date from an Excel cell and paste the price corresponding to the date. Here is an example:

https://cloud.iexapis.com/stable /stock/AAPL/chart/1m?token = pk_98e61bb72fd84b7d8b5f19c579fd0d9d

下面是我的代码，但是我需要对其进行修改，以便它可以循环查找所需的日期:

Below is my code, but I need to modify it so it can loop to find the date required:

Sub getHistoricalData()
'Application.DisplayAlerts = False
Application.ScreenUpdating = False

Dim wb As Workbook
Dim ws As Worksheet
Dim rng As Range
Dim symbol As Variant
Dim n As Integer
Dim lastrow As Long
Dim myrequest As Variant
Dim i As Variant

Set wb = ActiveWorkbook
Set ws = Sheets("Sheet1")
ws.Activate

'Last row find
lastrow = ws.Cells(Rows.Count, "A").End(xlUp).Row

Set rng = ws.Range("A3:A" & lastrow)

'Clear Prior Prices
ws.Range("k3:k" & lastrow).ClearContents

n = 3

'Get Symbols list
For Each symbol In rng
    Set myrequest = CreateObject("WinHttp.WinHttpRequest.5.1")
    myrequest.Open "Get", "https://cloud.iexapis.com/stable/stock/" & symbol & "/chart/1m?token=pk_98e61bb72fd84b7d8b5f19c579fd0d9d" 'updated 06/15/2019
    'Debug.Print myrequest.ResponseText

    Dim Json As Object
    Set Json = JsonConverter.ParseJson(myrequest.ResponseText)

    'MsgBox (myrequest.ResponseText)
    i = Json("Close")
    ws.Range(Cells(n, 2), Cells(n, 2)) = i
    n = n + 1
Next symbol

ws.Columns("k").AutoFit
'MsgBox ("Data is downloaded.")

ws.Range("k3:k" & lastrow).HorizontalAlignment = xlGeneral
ws.Range("k3:k" & lastrow).NumberFormat = "$#,##0.00"

Application.DisplayAlerts = True
Application.ScreenUpdating = False

End Sub

例如，我需要提取2019年6月6日每个股票代码的收盘价.

For Example, I need to extract the closing price on 06/06/2019 for each stock symbol.

推荐答案

Json解析器将是一个理想的选择.但是，您还可以从响应中进行正则表达式处理，并处理http错误的情况，即未成功连接到所需页面以及找不到日期的情况.我从单元格A1中读取了日期.日期的格式明确为yyyy-mm-dd.将行情收录器读取到循环的数组中-速度更快.结果存储在数组中，一次写到表格中-速度也更快.

Json parser would be an ideal choice. You can however also regex out from the response and handle cases of http errors i.e. where not a successful connection to desired page, as well as and date not found. I read the date from cell A1. The date is formatted unambiguously as yyyy-mm-dd. The tickers are read into an array which is looped - this is faster. Results are stored in an array and written out once to sheet - also faster.

Option Explicit
Public Sub GetClosePrices()
    Dim lastRow As Long, url As String, ws As Worksheet, tickers(), dateString As String

    Set ws = ThisWorkbook.Worksheets("Sheet1")
    With ws
        dateString = Format$(.Range("A1").Value, "yyyy-mm-dd")
        lastRow = .Cells(.Rows.Count, "A").End(xlUp).Row
        If lastRow >= 3 Then
           .Range("K3:K" & lastRow).ClearContents
            tickers = Application.Transpose(.Range("A3:A" & lastRow).Value)
        Else
           Exit Sub
        End If
    End With

    Dim s As String, re As Object, p As String, r As String, prices(), i As Long
    ReDim prices(1 To UBound(tickers))

    p = """DATE_HERE"",""open"":[0-9.]+,""close"":(.*?),"   'Format must be YYYY-MM-DD
    p = Replace$(p, "DATE_HERE", dateString)
    url = "https://cloud.iexapis.com/stable/stock/TICKER_HERE/chart/1m?token=pk_98e61bb72fd84b7d8b5f19c579fd0d9d"
    Set re = CreateObject("VBScript.RegExp")

    With CreateObject("MSXML2.XMLHTTP")
        For i = LBound(tickers) To UBound(tickers)
            .Open "GET", Replace$(url, "TICKER_HERE", tickers(i)), False
            .setRequestHeader "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT"
            .send
            If .Status = 200 Then
                s = .responseText
                r = GetValue(re, s, p)
            Else
                r = "Failed connection"
            End If
            prices(i) = r
        s = vbNullString
        Next
    End With
    ws.Cells(3, "K").Resize(UBound(prices), 1) = Application.Transpose(prices)
End Sub

Public Function GetValue(ByVal re As Object, ByVal inputString As String, ByVal pattern As String) As String
    With re
        .Global = True
        .pattern = pattern
        If .test(inputString) Then  ' returns True if the regex pattern can be matched agaist the provided string
            GetValue = .Execute(inputString)(0).submatches(0)
        Else
            GetValue = "Not found"
        End If
    End With
End Function

示例日期的正则表达式说明(试试吧):

Regex explanation for an example date (try it):

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