在PHP上显示JFreechart画的统计图方法

<%
String startTime = request.getParameter("startTime");
String endTime = request.getParameter("endTime");
String filter = request.getParameter("filter");
Charts charts = new Charts();
String start = startTime == null ? "2013-05-12" : startTime;
String end = endTime == null ? "2013-11-01" : endTime;
String filters = filter == null ? "eventtype" : filter;
JFreeChart chart = charts
.getPieChart(startTime, endTime, filter);//开始时间、结束时间、filter
String filename = ServletUtilities.saveChartAsJPEG(chart, 800, 400,
null, session);
FileOutputStream fos_jpg = null;
File file = new File(application.getRealPath("")+"/charts");
String path =request.getContextPath()+"/charts/NoData.jpg";
try {
file.mkdirs();
fos_jpg = new FileOutputStream(file.getPath()+"/"+filename);
ChartUtilities.writeChartAsJPEG(fos_jpg, 1.0f, chart, 800, 400,
null);
} catch (Exception e) {
} finally {
try {
fos_jpg.close();
} catch (Exception e) {
}
}
path = request.getContextPath()+"/charts/"+filename;
%>
<div align="center">
<img src="<%=path %>" name="图片" width=800 height=400 border=0>
</div>

extjs.chart.chart3D = function(nodeid,id){
var panel = new Ext.Panel({
border:false,
fitToFrame: true,//很简单的就一个Html标签
html: '<iframe id="frameHelp" src="/getColumnChart.jsp" frameborder="0" width="100%" height="520" ></iframe>'
});
return panel;
}