上篇文章为柱状图，这篇为饼状，主要是渲染的方式和构建JSON对象不同

WEB端：

/*
饼状图函数
*/
/*
返回JSON对象必需类似于[[['name1',100],['name2',100]]]，jqplot 自动换算成 name1:50%,name2:50%
*/
function createPieCharts(){
var ajaxDataRenderer = function (url,plot,options) {
var ret = null;
$.ajax({
async: false,
url: url,
dataType: "json",
success: function (data) {
ret =data;
}
});
return ret;
};

var jsonurl = "/test/servlet/PieServlet";
var options = {
seriesDefaults: {
//饼状图渲染
renderer: jQuery.jqplot.PieRenderer,
rendererOptions: {
showDataLabels: true
}
},
title : '饼状图数据显示',
legend: { show:true,location: 'e'},//显示位置
dataRenderer: ajaxDataRenderer,
dataRendererOptions: { unusedOptionalUrl: jsonurl}
}
var plot1 = jQuery.jqplot ('chart2',jsonurl,options);
}

服务端：

response.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
JSONArray list = new JSONArray();
JSONArray members = new JSONArray();
PrintWriter out= response.getWriter();
try {
for(int i=1;i<5;i++){
JSONArray member = new JSONArray();
member.put("张飞" + i);
member.put(i *100);
members.put(member);
}
list.put(members);
out.write(list.toString());

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

out.flush();
out.close();

图片：