jQuery访问json文件中数据的方法示例

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本文实例讲述了jQuery访问json文件中数据的方法。分享给大家供大家参考，具体如下：

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>jQuery访问json</title>
  <script type="text/javascript" src="https://zhanzhang360.qulang.net/imgupload/004759/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="获取数据" id="btn"/>
  </div>
  <div id="jsonTip">
  </div>
</div>
</body>
</html>

我这里的jquery用的1.4.0版本的js文件，即https://zhanzhang360.qulang.net/imgupload/004759/jquery.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