如何使用JSON WebScrap子对象“地址”

Question

地址字段在Excel工作表中为空白

结果（r，4）=评论（“ streetAddress”）

在网络封存期间；我正在相应地从网站和数据中导入字段，请指导我。

表格A1 = https://www.yellowpages.com/atlanta-ga/restaurants?page=

Option Explicit 

Public Sub GetRestuarantInfo()

    Dim s As String, re As Object, p As String, page As Long, r As String, json As Object 'Variable Definations
    Const START_PAGE As Long = 2
    Const END_PAGE As Long = 4
    Const RESULTS_PER_PAGE As Long = 40

    p = "\[{""@context"".*?\]"
    Set re = CreateObject("VBScript.RegExp")
    Application.ScreenUpdating = False            
    With CreateObject("MSXML2.XMLHTTP")    
    For page = START_PAGE To END_PAGE ' Run for loop for defined Page numbers
            .Open "GET", Sheet1.Range("A1") & page, False 
            .send 
             If .Status = 200 Then 
             s = .responseText 
                r = GetValue(re, s, p) 
                If r <> "Not Found" Then 
                    Set json = JsonConverter.ParseJson(r)
                    WriteOutResults page, RESULTS_PER_PAGE, json
                End If

            End If
        Next
    End With
    Application.ScreenUpdating = True

End Sub
Public Sub WriteOutResults(ByVal page As Long, ByVal RESULTS_PER_PAGE As Long, ByVal json As Object)
    Dim sheetName As String, results(), r As Long, headers(), ws As Worksheet
    ReDim results(1 To RESULTS_PER_PAGE, 1 To 4)

    sheetName = "page" & page ' This module is just to write results pagewise which is not needed in your case
    headers = Array("Name", "Website", "Tel", "Address") 'Defination of headers
    If Not WorksheetExists(sheetName) Then ' Creation of sheets
        Set ws = ThisWorkbook.Worksheets.Add
        ws.Name = sheetName
    Else
        ThisWorkbook.Worksheets(sheetName).ClearContents
    End If
    With ws
        Dim review As Object
        For Each review In json ' Bringing results from Json to excel sheet
            r = r + 1
            results(r, 1) = review("name") 'write results of name field
            results(r, 2) = review("url") 'write results of url field
            results(r, 3) = review("telephone") 'write results of telephone field
             results(r, 4) = review("streetAddress") 'write results of telephone field
        Next
        .Cells(1, 1).Resize(1, UBound(headers) + 1) = headers 
        .Cells(2, 1).Resize(UBound(results, 1), UBound(results, 2)) = results
    End With
End Sub

Public Function GetValue(ByVal re As Object, inputString As String, ByVal pattern As String) As String
    With re
        .Global = True 
        .MultiLine = True  

        .IgnoreCase = False 'Use case-insensitive matching.
        .pattern = pattern 'The pattern (written in Regex) which you want to match against (e.g. “(.*)”)

        'Test (string) – returns True if the pattern can be matched agaist the provided string
         'Web Link: https://analystcave.com/excel-regex-tutorial/
        If .Test(inputString) Then
            GetValue = .Execute(inputString)(0)
        Else
            GetValue = "Not found"
        End If
    End With
End Function

Public Function WorksheetExists(ByVal sName As String) As Boolean
    WorksheetExists = Evaluate("ISREF('" & sName & "'!A1)") 
End Function

对于下面的代码，我一直不了解地址范围，因为我是VBA的新手，所以非常感谢您的帮助。

Answer 1

地址的json访问路径不同

review("address")给出了字典

您需要按键访问各个行，或者像我一样，将字典中的所有项目都连接起来，以创建一个用空格分隔的字符串作为完整地址。

VBA：

Option Explicit

Public Sub GetRestuarantInfo()
    Dim s As String, re As Object, p As String, page As Long, r As String, json As Object 'Variable Definations
    Const START_PAGE As Long = 2
    Const END_PAGE As Long = 4
    Const RESULTS_PER_PAGE As Long = 40

    p = "\[{""@context"".*?\]"
    Set re = CreateObject("VBScript.RegExp")
    Application.ScreenUpdating = False
    With CreateObject("MSXML2.XMLHTTP")
        For page = START_PAGE To END_PAGE        ' Run for loop for defined Page numbers
            .Open "GET", "https://www.yellowpages.com/atlanta-ga/restaurants?page=" & page, False
            .send
            If .Status = 200 Then
                s = .responseText
                r = GetValue(re, s, p)
                If r <> "Not Found" Then
                    Set json = JsonConverter.ParseJson(r)
                    WriteOutResults page, RESULTS_PER_PAGE, json
                End If

            End If
        Next
    End With
    Application.ScreenUpdating = True
End Sub

Public Sub WriteOutResults(ByVal page As Long, ByVal RESULTS_PER_PAGE As Long, ByVal json As Object)
    Dim sheetName As String, results(), r As Long, headers(), ws As Worksheet
    ReDim results(1 To RESULTS_PER_PAGE, 1 To 4)

    sheetName = "page" & page                    ' This module is just to write results pagewise which is not needed in your case
    headers = Array("Name", "Website", "Tel", "Address") 'Defination of headers
    If Not WorksheetExists(sheetName) Then       ' Creation of sheets
        Set ws = ThisWorkbook.Worksheets.Add
        ws.Name = sheetName
    Else
        Set ws = ThisWorkbook.Worksheets(sheetName)
        ws.Cells.ClearContents
    End If
    With ws
        Dim review As Object
        For Each review In json                  ' Bringing results from Json to excel sheet
            r = r + 1
            results(r, 1) = review("name")       'write results of name field
            results(r, 2) = review("url")        'write results of url field
            results(r, 3) = review("telephone")  'write results of telephone field
            results(r, 4) = Replace$(Join$(review("address").items, " "), "PostalAddress ", vbNullString) 'write results of telephone field
        Next
        .Cells(1, 1).Resize(1, UBound(headers) + 1) = headers
        .Cells(2, 1).Resize(UBound(results, 1), UBound(results, 2)) = results
    End With
End Sub

Public Function GetValue(ByVal re As Object, inputString As String, ByVal pattern As String) As String
    With re
        .Global = True
        .MultiLine = True

        .IgnoreCase = False                      'Use case-insensitive matching.
        .pattern = pattern                       'The pattern (written in Regex) which you want to match against (e.g. “(.*)”)

        'Test (string) – returns True if the pattern can be matched agaist the provided string
        'Web Link: https://analystcave.com/excel-regex-tutorial/
        If .test(inputString) Then
            GetValue = .Execute(inputString)(0)
        Else
            GetValue = "Not found"
        End If
    End With
End Function

Public Function WorksheetExists(ByVal sName As String) As Boolean
    WorksheetExists = Evaluate("ISREF('" & sName & "'!A1)")
End Function