本文實例講述了jQuery訪問json文件中數據的方法。分享給大家供大家參考，具體如下：
有時候我們可能需要用到json文件存儲數據，然后通過前臺語言直接進行訪問。
首先是json文件：
{ "管道": [ { "ElementId": "標識號", "GISID": "GISID", "Label": "編號", "StartNodeID":"起始節點ID", "EndNodeID":"終止節點ID", "StartNodeLabel":"起始節點編號", "EndNodeLabel":"終止節點編號", "Physical_PipeDiameter":"管徑", "Physical_PipeMaterialID":"管材", "Physical_HazenWilliamsC":"海曾威廉C值", "Physical_Length":"管長", "Physical_MinorLossCoefficient":"局部阻力系數", "Physical_InstallationYear":"鋪設年代", "Physical_Address":"地址", "District":"營銷公司", "DMA":"計量區", "Zone":"行政區", "flow":"當前流量", "velocity":"當前流速", "headloss":"當前水頭損失" }], "節點": [{ "ElementId": "標識號", "GISID": "GISID", "Label": "編號", "Physical_Elevation":"地面高程", "Physical_Depth":"埋深", "Physical_Address":"地址", "District":"營銷公司", "DMA":"計量區", "Zone":"行政區", "hydraulicGrade":"水壓標高", "pressure":"自由水壓", "demand":"節點流量", "cl":"余氯濃度", "age":"水齡", "source":"供水水源" }], "閥門": [{ "ElementId": "標識號", "GISID": "GISID", "Label": "編號", "Physical_Elevation":"地面高程", "Physical_Depth":"埋深", "Physical_Diameter":"口徑", "Physical_Status":"閥門狀態", "Physical_Address":"地址", "District":"營銷公司", "DMA":"計量區", "Zone":"行政區", "Physical_InstallationYear":"安裝年代" }], "水表": [{ "DIAMETER":"口徑", "CALIBER": "表徑", "MATERIAL": "材質", "DEPTH":"埋深", "HEIGHT":"地面高程", "ADDR":"地址", "WATREGID": "表號", "USERNAME":"用戶名", "JUNCTION":"接口類型", "DISTRICT":"行政區", "MEASUREIN":"營銷公司", "FINISHDATE":"安裝日期" }], "消火栓": [{ "ElementId": "標識號", "GISID": "GISID", "Label": "編號", "Physical_Elevation":"地面高程", "Physical_Depth":"埋深", "Physical_Address":"地址", "District":"營銷公司", "DMA":"計量區", "Zone":"行政區", "Physical_Diameter":"口徑", "Physical_Type":"樣式" }]}創建CriteriaQuery.json文件，文件內容如上。
前臺代碼：
<html><head> <meta charset="GBK"/> <title>jQuery訪問json</title> <script type="text/javascript" src="https://libs.baidu.com/jquery/1.4.0/jquery.min.js"></script> <script type="text/javascript"> $(function (){ $("#btn").click(function(){ $.getJSON("CriteriaQuery.json",function(data){ var $jsontip = $("#jsonTip"); var strHtml = ""; $jsontip.empty(); $.each(data.管道,function(infoIndex,info){ for(var o in info){ strHtml +=info[o]; } //strHtml +=info["ElementId"]; }); $jsontip.html(strHtml); }) }) }) </script></head><body><div id="divframe"> <div class="loadTitle"> <input type="button" value="獲取數據" id="btn"/> </div> <div id="jsonTip"> </div></div></body></html>
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