Hi All
I have a problem: table has no columns
Below are my codes. Please help me to find the error.
pie.jsp
----------
<%@page contentType="application/json; charset=UTF-8"%>
<%@page import="net.sf.json.JSONObject,net.sf.json.JSONArray"%>
<%
JSONObject obj=new JSONObject();
obj.put("name","foo");
obj.put("num",new Integer(100));
obj.put("balance",new Double(1000.21));
obj.put("is_vip",new Boolean(true));
obj.put("nickname",null);
out.print(obj);
out.flush();
%>
---------------------------------------------------------
Charts.jsp
--------------
<html>
<head>
<title>Charts</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"
/>
<script type="text/javascript" src="js/jsapi.js"></script>
<script type="text/javascript"
src="js/jquery-1.7.1.min.js"></script>
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var jsonData = $.ajax({
url: "./charts/pie.jsp",
dataType:"json",
async: false,
options: {'title': 'Reports'}
}).responseText;
var data = new google.visualization.DataTable(jsonData);
var chart = new
google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, {width: 400, height: 240});
}
</script>
</head>
<body>
<h3>Charts Demo</h3>
<div id="chart_div" style="width: 400px; height: 200px;"></div>
</body>
</html>
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