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首先建立json.txt文件
{
"programmers": [
{ "firstName": "Brett","lastName":"McLaughlin","email": "brett@newInstance.com" },
{ "firstName": "Jason","lastName":"Hunter","email": "jason@servlets.com" },
{ "firstName": "Elliotte","lastName":"Harold","email": "elharo@macfaq.com" }
],
"authors": [
{ "firstName": "Isaac","lastName": "Asimov","genre": "science fiction" },
{ "firstName": "Tad","lastName": "Williams","genre": "fantasy" },
{ "firstName": "Frank","lastName": "Peretti","genre": "christian fiction" }
],
"musicians": [
{ "firstName": "Eric","lastName": "Clapton","instrument": "guitar" },
{ "firstName": "Sergei","lastName": "Rachmaninoff","instrument": "piano" }
]
}
通过异步调用，来读取json数据
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest()
{
if(window.ActiveXObject)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if(window.XMLHttpRequest)
{
xmlHttp = new XMLHttpRequest();
}
}
function startRequest()
{
createXMLHttpRequest();
try
{
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.open("GET","Json.txt",true);
xmlHttp.send(null);
}
catch(exception)
{
alert("xmlHttp Fail");
}
}
function handleStateChange()
{
if(xmlHttp.readyState == 4)
{
if (xmlHttp.status == 200 || xmlHttp.status == 0)
{
var result = xmlHttp.responseText;
var json = eval("(" + result + ")");
alert(json.programmers[0].firstName);//读取json数据
//alert(json.sex);
}
}
}
</script>
</head>
<body>
<div>
<input type="button" value="AjaxTest" onclick="startRequest();" />
</div>
</body>
</html> （编辑：李大同）
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