jquery访问json文件中的数据
json
适用于现代 C++ 的 JSON。
项目地址:https://gitcode.com/gh_mirrors/js/json
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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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适用于现代 C++ 的 JSON。
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