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jquery访问json文件中的数据（jquery访问对象的方法）

nanyue 2024-09-11 05:25:10 技术文章 4 ℃

有时候我们可能需要用到json文件存储数据，然后通过前台语言直接进行访问。

首先是json文件：

{
 "管道": [
 {
 "ElementId": "标识号",
 "GISID": "GISID",
 "Label": "编号",
 "StartNodeID":"起始节点ID",
 "EndNodeID":"终止节点ID",
 "StartNodeLabel":"起始节点编号",
 "EndNodeLabel":"终止节点编号",
 "Physical_PipeDiameter":"管径",
 "Physical_PipeMaterialID":"管材",
 "Physical_HazenWilliamsC":"海曾威廉C值",
 "Physical_Length":"管长",
 "Physical_MinorLossCoefficient":"局部阻力系数",
 "Physical_InstallationYear":"铺设年代",
 "Physical_Address":"地址",
 "District":"营销公司",
 "DMA":"计量区",
 "Zone":"行政区",
 "flow":"当前流量",
 "velocity":"当前流速",
 "headloss":"当前水头损失"
 }],
 "节点": [{
 "ElementId": "标识号",
 "GISID": "GISID",
 "Label": "编号",
 "Physical_Elevation":"地面高程",
 "Physical_Depth":"埋深",
 "Physical_Address":"地址",
 "District":"营销公司",
 "DMA":"计量区",
 "Zone":"行政区",
 "hydraulicGrade":"水压标高",
 "pressure":"自由水压",
 "demand":"节点流量",
 "cl":"余氯浓度",
 "age":"水龄",
 "source":"供水水源"
 }],
 "阀门": [{
 "ElementId": "标识号",
 "GISID": "GISID",
 "Label": "编号",
 "Physical_Elevation":"地面高程",
 "Physical_Depth":"埋深",
 "Physical_Diameter":"口径",
 "Physical_Status":"阀门状态",
 "Physical_Address":"地址",
 "District":"营销公司",
 "DMA":"计量区",
 "Zone":"行政区",
 "Physical_InstallationYear":"安装年代"
 }],
 "水表": [{
 "DIAMETER":"口径",
 "CALIBER": "表径",
 "MATERIAL": "材质",
 "DEPTH":"埋深",
 "HEIGHT":"地面高程",
 "ADDR":"地址",
 "WATREGID": "表号",
 "USERNAME":"用户名",
 "JUNCTION":"接口类型",
 "DISTRICT":"行政区",
 "MEASUREIN":"营销公司",
 "FINISHDATE":"安装日期"
 }],
 "消火栓": [{
 "ElementId": "标识号",
 "GISID": "GISID",
 "Label": "编号",
 "Physical_Elevation":"地面高程",
 "Physical_Depth":"埋深",
 "Physical_Address":"地址",
 "District":"营销公司",
 "DMA":"计量区",
 "Zone":"行政区",
 "Physical_Diameter":"口径",
 "Physical_Type":"样式"
 }]
}

创建CriteriaQuery.json文件，文件内容如上。

前台代码：

<html>
<head>
 <meta charset="GBK"/>
 <title></title>
 <script type="text/javascript" src="http://ajax.microsoft.com/ajax/jquery/jquery-1.4.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="获取数据" id="btn"/>
 </div>
 <div id="jsonTip">
 </div>
</div>
</body>
</html>

我这里的jquery用的是微软发布的1.4的js文件，即 http://ajax.microsoft.com/ajax/jquery/jquery-1.4.min.js

json文件与html放在同一个目录下。

运行代码，点击获取数据按钮，就能够在页面上看到遍历json文件所得到的“管道”的所有信息。当然，也可以通过key来获取到json文件的value，即

strHtml +=info["ElementId"];

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