需要使用json数据的场景很多,那么asp中如何操作json数据呢?asp与json格式又如何交互呢?本文介绍使用AspJson转换为json格式数据输出,以及解析json数据。
aspJSON1.17.asp文件
<% 'Februari 2014 - Version 1.17 by Gerrit van Kuipers Class aspJSON Public data Private p_JSONstring private aj_in_string, aj_in_escape, aj_i_tmp, aj_char_tmp, aj_s_tmp, aj_line_tmp, aj_line, aj_lines, aj_currentlevel, aj_currentkey, aj_currentvalue, aj_newlabel, aj_XmlHttp, aj_RegExp, aj_colonfound Private Sub Class_Initialize() Set data = Collection() Set aj_RegExp = new regexp aj_RegExp.Pattern = "\s{0,}(\S{1}[\s,\S]*\S{1})\s{0,}" aj_RegExp.Global = False aj_RegExp.IgnoreCase = True aj_RegExp.Multiline = True End Sub Private Sub Class_Terminate() Set data = Nothing Set aj_RegExp = Nothing End Sub Public Sub loadJSON(inputsource) inputsource = aj_MultilineTrim(inputsource) If Len(inputsource) = 0 Then Err.Raise 1, "loadJSON Error", "No data to load." select case Left(inputsource, 1) case "{", "[" case else Set aj_XmlHttp = Server.CreateObject("Msxml2.ServerXMLHTTP") aj_XmlHttp.open "GET", inputsource, False aj_XmlHttp.setRequestHeader "Content-Type", "text/json" aj_XmlHttp.setRequestHeader "CharSet", "UTF-8" aj_XmlHttp.Send inputsource = aj_XmlHttp.responseText set aj_XmlHttp = Nothing end select p_JSONstring = CleanUpJSONstring(inputsource) aj_lines = Split(p_JSONstring, Chr(13) & Chr(10)) Dim level(99) aj_currentlevel = 1 Set level(aj_currentlevel) = data For Each aj_line In aj_lines aj_currentkey = "" aj_currentvalue = "" If Instr(aj_line, ":") > 0 Then aj_in_string = False aj_in_escape = False aj_colonfound = False For aj_i_tmp = 1 To Len(aj_line) If aj_in_escape Then aj_in_escape = False Else Select Case Mid(aj_line, aj_i_tmp, 1) Case """" aj_in_string = Not aj_in_string Case ":" If Not aj_in_escape And Not aj_in_string Then aj_currentkey = Left(aj_line, aj_i_tmp - 1) aj_currentvalue = Mid(aj_line, aj_i_tmp + 1) aj_colonfound = True Exit For End If Case "\" aj_in_escape = True End Select End If Next if aj_colonfound then aj_currentkey = aj_Strip(aj_JSONDecode(aj_currentkey), """") If Not level(aj_currentlevel).exists(aj_currentkey) Then level(aj_currentlevel).Add aj_currentkey, "" end if End If If right(aj_line,1) = "{" Or right(aj_line,1) = "[" Then If Len(aj_currentkey) = 0 Then aj_currentkey = level(aj_currentlevel).Count Set level(aj_currentlevel).Item(aj_currentkey) = Collection() Set level(aj_currentlevel + 1) = level(aj_currentlevel).Item(aj_currentkey) aj_currentlevel = aj_currentlevel + 1 aj_currentkey = "" ElseIf right(aj_line,1) = "}" Or right(aj_line,1) = "]" or right(aj_line,2) = "}," Or right(aj_line,2) = "]," Then aj_currentlevel = aj_currentlevel - 1 ElseIf Len(Trim(aj_line)) > 0 Then if Len(aj_currentvalue) = 0 Then aj_currentvalue = aj_line aj_currentvalue = getJSONValue(aj_currentvalue) If Len(aj_currentkey) = 0 Then aj_currentkey = level(aj_currentlevel).Count level(aj_currentlevel).Item(aj_currentkey) = aj_currentvalue End If Next End Sub Public Function Collection() set Collection = Server.CreateObject("Scripting.Dictionary") End Function Public Function AddToCollection(dictobj) if TypeName(dictobj) <> "Dictionary" then Err.Raise 1, "AddToCollection Error", "Not a collection." aj_newlabel = dictobj.Count dictobj.Add aj_newlabel, Collection() set AddToCollection = dictobj.item(aj_newlabel) end function Private Function CleanUpJSONstring(aj_originalstring) aj_originalstring = Replace(aj_originalstring, Chr(13) & Chr(10), "") aj_originalstring = Mid(aj_originalstring, 2, Len(aj_originalstring) - 2) aj_in_string = False : aj_in_escape = False : aj_s_tmp = "" For aj_i_tmp = 1 To Len(aj_originalstring) aj_char_tmp = Mid(aj_originalstring, aj_i_tmp, 1) If aj_in_escape Then aj_in_escape = False aj_s_tmp = aj_s_tmp & aj_char_tmp Else Select Case aj_char_tmp Case "\" : aj_s_tmp = aj_s_tmp & aj_char_tmp : aj_in_escape = True Case """" : aj_s_tmp = aj_s_tmp & aj_char_tmp : aj_in_string = Not aj_in_string Case "{", "[" aj_s_tmp = aj_s_tmp & aj_char_tmp & aj_InlineIf(aj_in_string, "", Chr(13) & Chr(10)) Case "}", "]" aj_s_tmp = aj_s_tmp & aj_InlineIf(aj_in_string, "", Chr(13) & Chr(10)) & aj_char_tmp Case "," : aj_s_tmp = aj_s_tmp & aj_char_tmp & aj_InlineIf(aj_in_string, "", Chr(13) & Chr(10)) Case Else : aj_s_tmp = aj_s_tmp & aj_char_tmp End Select End If Next CleanUpJSONstring = "" aj_s_tmp = split(aj_s_tmp, Chr(13) & Chr(10)) For Each aj_line_tmp In aj_s_tmp aj_line_tmp = replace(replace(aj_line_tmp, chr(10), ""), chr(13), "") CleanUpJSONstring = CleanUpJSONstring & aj_Trim(aj_line_tmp) & Chr(13) & Chr(10) Next End Function Private Function getJSONValue(ByVal val) val = Trim(val) If Left(val,1) = ":" Then val = Mid(val, 2) If Right(val,1) = "," Then val = Left(val, Len(val) - 1) val = Trim(val) Select Case val Case "true" : getJSONValue = True Case "false" : getJSONValue = False Case "null" : getJSONValue = Null Case Else If (Instr(val, """") = 0) Then If IsNumeric(val) Then getJSONValue = CDbl(val) Else getJSONValue = val End If Else If Left(val,1) = """" Then val = Mid(val, 2) If Right(val,1) = """" Then val = Left(val, Len(val) - 1) getJSONValue = aj_JSONDecode(Trim(val)) End If End Select End Function Private JSONoutput_level Public Function JSONoutput() dim wrap_dicttype, aj_label JSONoutput_level = 1 wrap_dicttype = "[]" For Each aj_label In data If Not aj_IsInt(aj_label) Then wrap_dicttype = "{}" Next JSONoutput = Left(wrap_dicttype, 1) & Chr(13) & Chr(10) & GetDict(data) & Right(wrap_dicttype, 1) End Function Private Function GetDict(objDict) dim aj_item, aj_keyvals, aj_label, aj_dicttype For Each aj_item In objDict Select Case TypeName(objDict.Item(aj_item)) Case "Dictionary" GetDict = GetDict & Space(JSONoutput_level * 4) aj_dicttype = "[]" For Each aj_label In objDict.Item(aj_item).Keys If Not aj_IsInt(aj_label) Then aj_dicttype = "{}" Next If aj_IsInt(aj_item) Then GetDict = GetDict & (Left(aj_dicttype,1) & Chr(13) & Chr(10)) Else GetDict = GetDict & ("""" & aj_JSONEncode(aj_item) & """" & ": " & Left(aj_dicttype,1) & Chr(13) & Chr(10)) End If JSONoutput_level = JSONoutput_level + 1 aj_keyvals = objDict.Keys GetDict = GetDict & (GetSubDict(objDict.Item(aj_item)) & Space(JSONoutput_level * 4) & Right(aj_dicttype,1) & aj_InlineIf(aj_item = aj_keyvals(objDict.Count - 1),"" , ",") & Chr(13) & Chr(10)) Case Else aj_keyvals = objDict.Keys GetDict = GetDict & (Space(JSONoutput_level * 4) & aj_InlineIf(aj_IsInt(aj_item), "", """" & aj_JSONEncode(aj_item) & """: ") & WriteValue(objDict.Item(aj_item)) & aj_InlineIf(aj_item = aj_keyvals(objDict.Count - 1),"" , ",") & Chr(13) & Chr(10)) End Select Next End Function Private Function aj_IsInt(val) aj_IsInt = (TypeName(val) = "Integer" Or TypeName(val) = "Long") End Function Private Function GetSubDict(objSubDict) GetSubDict = GetDict(objSubDict) JSONoutput_level= JSONoutput_level -1 End Function Private Function WriteValue(ByVal val) Select Case TypeName(val) Case "Double", "Integer", "Long": WriteValue = val Case "Null" : WriteValue = "null" Case "Boolean" : WriteValue = aj_InlineIf(val, "true", "false") Case Else : WriteValue = """" & aj_JSONEncode(val) & """" End Select End Function Private Function aj_JSONEncode(ByVal val) val = Replace(val, "\", "\\") val = Replace(val, """", "\""") 'val = Replace(val, "/", "\/") val = Replace(val, Chr(8), "\b") val = Replace(val, Chr(12), "\f") val = Replace(val, Chr(10), "\n") val = Replace(val, Chr(13), "\r") val = Replace(val, Chr(9), "\t") aj_JSONEncode = Trim(val) End Function Private Function aj_JSONDecode(ByVal val) val = Replace(val, "\""", """") val = Replace(val, "\\", "\") val = Replace(val, "\/", "/") val = Replace(val, "\b", Chr(8)) val = Replace(val, "\f", Chr(12)) val = Replace(val, "\n", Chr(10)) val = Replace(val, "\r", Chr(13)) val = Replace(val, "\t", Chr(9)) aj_JSONDecode = Trim(val) End Function Private Function aj_InlineIf(condition, returntrue, returnfalse) If condition Then aj_InlineIf = returntrue Else aj_InlineIf = returnfalse End Function Private Function aj_Strip(ByVal val, stripper) If Left(val, 1) = stripper Then val = Mid(val, 2) If Right(val, 1) = stripper Then val = Left(val, Len(val) - 1) aj_Strip = val End Function Private Function aj_MultilineTrim(TextData) aj_MultilineTrim = aj_RegExp.Replace(TextData, "$1") End Function private function aj_Trim(val) aj_Trim = Trim(val) Do While Left(aj_Trim, 1) = Chr(9) : aj_Trim = Mid(aj_Trim, 2) : Loop Do While Right(aj_Trim, 1) = Chr(9) : aj_Trim = Left(aj_Trim, Len(aj_Trim) - 1) : Loop aj_Trim = Trim(aj_Trim) end function End Class %>
AspJson官方使用方法参考
示例一—输出json
<!--#include virtual="/aspJSON1.17.asp" --> <% Set oJSON = New aspJSON With oJSON.data .Add "familyName", "Smith" 'Create value .Add "familyMembers", oJSON.Collection() With oJSON.data("familyMembers") .Add 0, oJSON.Collection() 'Create object With .item(0) .Add "firstName", "John" .Add "age", 41 End With .Add 1, oJSON.Collection() With .item(1) .Add "firstName", "Suzan" .Add "age", 38 .Add "interests", oJSON.Collection() 'Create array With .item("interests") .Add 0, "Reading" .Add 1, "Tennis" .Add 2, "Painting" End With End With .Add 2, oJSON.Collection() With .item(2) .Add "firstName", "John Jr." .Add "age", 2.5 End With End With End With Response.Write oJSON.JSONoutput() 'Return json string %>
示例二—转换为json格式输出
读取数据库中article表数据,转换为json格式数据输出
示例三—JS读取Json
前端js使用ajax调用后端接口,获取到上面的json数据,解析输出。
var postData="Action=Announce" //alert(postData) digtalMessage=""; digtalMessageAll=""; $.ajax({ type: "GET", url: "/OKOA/CN/AjaxInfo.asp", data: postData, success: function(msg){ //alert( "Data Saved: " + msg ); var obj = jQuery.parseJSON(msg); $.each(obj,function(idx,item){ //alert(item.activityBeginTime) digtalMessage=DigitalTime1(item.Title,item.Title,item.activityBeginTime,item.activityEndTime); digtalMessageAll=digtalMessageAll+" <a class=\"Default\" onClick=\"OpenWin('/OKOA/Announce.asp?ID="+item.ID+"','Annonce_"+item.ID+"')\" href=\"#\">"+digtalMessage+"</a>;" }) document.getElementById("LiveClock1").innerHTML=digtalMessageAll; } });
总结
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