jfc在jsp页面画图，不将图片存在服务器端，只存入会话session。其中主要用到jfc的一个servlet类。
<%@ page contentType="text/html;charset=gb2312" errorPage="../common/error.jsp" %>
<%@ page import="dqz.jsp.*" %>
<%@ page import="java.sql.*" %>
<%@ page import="javax.sql.*" %>
<%@ page import="javax.naming.*" %>
<%@ include file="../common/config.jsp"%>
<%@ include file="reporter_session.jsp"%>
<%@ page import="
org.jfree.chart.servlet.ServletUtilities,
java.awt.Font,
java.awt.Color,
org.jfree.chart.ChartFactory,
org.jfree.chart.ChartFrame,
org.jfree.chart.JFreeChart,
org.jfree.chart.StandardChartTheme,
org.jfree.chart.plot.CategoryPlot,
org.jfree.chart.plot.PlotOrientation,
org.jfree.data.category.CategoryDataset,
org.jfree.data.category.DefaultCategoryDataset,
org.jfree.chart.ChartUtilities,
org.jfree.chart.axis.CategoryAxis,
org.jfree.chart.axis.NumberAxis,
org.jfree.chart.axis.ValueAxis,
org.jfree.chart.labels.StandardCategoryItemLabelGenerator,
org.jfree.chart.renderer.category.BarRenderer,
org.jfree.chart.title.TextTitle, java.io.FileOutputStream,
java.io.IOException, java.io.PrintWriter,
java.util.ArrayList, java.util.HashMap, java.util.List,
java.util.Map,
java.text.DecimalFormat,
java.text.NumberFormat,
java.io.FileOutputStream,
java.io.IOException,
java.io.PrintWriter,
java.sql.Connection,
java.sql.DriverManager,
java.sql.PreparedStatement,
java.sql.ResultSet,
java.sql.SQLException,
java.util.ArrayList,
java.util.List,
org.jfree.chart.servlet.ServletUtilities,
java.util.Map,
org.jfree.chart.labels.StandardPieSectionLabelGenerator,
org.jfree.chart.labels.StandardPieToolTipGenerator,
org.jfree.chart.plot.PiePlot3D,
org.jfree.data.general.DefaultPieDataset,
org.jfree.data.general.PieDataset,
org.jfree.chart.title.LegendTitle
"%>
//===========================直方图测试开始===================================================
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(610, "广州", "猪肉");
dataset.addValue(220, "广州", "牛肉");
dataset.addValue(530, "广州", "鸡肉");
dataset.addValue(340, "广州", "鱼肉");
JFreeChart mBarChart = ChartFactory.createBarChart3D("肉类销量统计图",
"肉类",
"销量",
dataset,
PlotOrientation.VERTICAL,
false,
false,
false);
//图表标题设置
TextTitle mTextTitle = mBarChart.getTitle();
mTextTitle.setFont(new Font("黑体", Font.BOLD, 20));
//mBarChart.setTitle(new TextTitle("学校人员分布图",new Font("黑体", Font.BOLD, 20)));
//图表图例设置
LegendTitle mLegend = mBarChart.getLegend();
if(mLegend != null)
mLegend.setItemFont(new Font("宋体", Font.CENTER_BASELINE, 15));
//mBarChart.getLegend().setItemFont(new Font("宋体", Font.CENTER_BASELINE, 15));
//设置柱状图轴
CategoryPlot mPlot = (CategoryPlot)mBarChart.getPlot();
//x轴
CategoryAxis mDomainAxis = mPlot.getDomainAxis();
//设置x轴标题的字体
mDomainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 15));
//设置x轴坐标字体
mDomainAxis.setTickLabelFont(new Font("宋体", Font.PLAIN, 15));
//y轴
ValueAxis mValueAxis = mPlot.getRangeAxis();
//设置y轴标题字体
mValueAxis.setLabelFont(new Font("宋体", Font.PLAIN, 15));
//设置y轴坐标字体
mValueAxis.setTickLabelFont(new Font("宋体", Font.PLAIN, 15));
//柱体显示数值
BarRenderer mRenderer= new BarRenderer();
mRenderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());
mRenderer.setItemLabelFont(new Font("宋体", Font.PLAIN, 10));
mRenderer.setItemLabelsVisible(true);
mPlot.setRenderer(mRenderer);
String filename = ServletUtilities.saveChartAsPNG(mBarChart, 800, 400, null, session);
String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
//===========================直方图测试结束===================================================
//===========================饼图测试开始===================================================
//设置数据源
DefaultPieDataset mpieDataset = new DefaultPieDataset();
mpieDataset.setValue(" 市场前期", new Double(10));
mpieDataset.setValue(" 立项", new Double(15));
mpieDataset.setValue(" 计划", new Double(20));
mpieDataset.setValue(" 需求与设计", new Double(10));
mpieDataset.setValue(" 执行控制", new Double(25));
mpieDataset.setValue(" 收尾", new Double(10));
mpieDataset.setValue(" 运维",new Double(10));
//建立图表
JFreeChart mpieChart = ChartFactory.createPieChart3D("项目进度分布", mpieDataset, true, true, false);
//设置图表标题
mpieChart.setTitle(new TextTitle("项目状态分布", new Font("黑体",Font.CENTER_BASELINE, 20)));
//设置Legend字体
mpieChart.getLegend().setItemFont(new Font("宋体", Font.ROMAN_BASELINE, 15));
PiePlot3D mPiePlot = (PiePlot3D)mpieChart.getPlot();
//以默认方式显示百分比
//mPiePlot.setLabelGenerator(new StandardPieSectionLabelGenerator(StandardPieToolTipGenerator.DEFAULT_TOOLTIP_FORMAT));
// 图片中显示百分比:自定义方式，{0} 表示选项， {1} 表示数值， {2} 表示所占比例 ,小数点后两位
mPiePlot.setLabelGenerator(new StandardPieSectionLabelGenerator("{0}={1}({2})", NumberFormat.getNumberInstance(), new DecimalFormat("0.00%")));
// 底部图例显示百分比:自定义方式， {0} 表示选项， {1} 表示数值， {2} 表示所占比例
mPiePlot.setLegendLabelGenerator(new StandardPieSectionLabelGenerator("{0}={1}({2})"));
//设置饼图标签字体
mPiePlot.setLabelFont(new Font("宋体", Font.PLAIN, 15));
String piefilename = ServletUtilities.saveChartAsPNG(mpieChart, 800, 400, null, session);
String piegraphURL = request.getContextPath() + "/DisplayChart?filename=" + piefilename;
//===========================饼图测试结束===================================================
//===========================折线图测试开始===================================================
StandardChartTheme mChartThemezxt = new StandardChartTheme("CN");
mChartThemezxt.setLargeFont(new Font("黑体", Font.BOLD, 20));
mChartThemezxt.setExtraLargeFont(new Font("宋体", Font.PLAIN, 15));
mChartThemezxt.setRegularFont(new Font("宋体", Font.PLAIN, 15));
ChartFactory.setChartTheme(mChartThemezxt);
// row keys...
String series1 = "First";
String series2 = "Second";
String series3 = "Third";
// column keys...
String type1 = "Type 1";
String type2 = "Type 2";
String type3 = "Type 3";
String type4 = "Type 4";
String type5 = "Type 5";
String type6 = "Type 6";
String type7 = "Type 7";
String type8 = "Type 8";
// create the dataset...
DefaultCategoryDataset dataset_zxt = new DefaultCategoryDataset();
dataset_zxt.addValue(1.0, series1, type1);
dataset_zxt.addValue(4.0, series1, type2);
dataset_zxt.addValue(3.0, series1, type3);
dataset_zxt.addValue(5.0, series1, type4);
dataset_zxt.addValue(5.0, series1, type5);
dataset_zxt.addValue(7.0, series1, type6);
dataset_zxt.addValue(7.0, series1, type7);
dataset_zxt.addValue(0.0, series1, type8);
dataset_zxt.addValue(5.0, series2, type1);
dataset_zxt.addValue(7.0, series2, type2);
dataset_zxt.addValue(6.0, series2, type3);
dataset_zxt.addValue(8.0, series2, type4);
dataset_zxt.addValue(4.0, series2, type5);
dataset_zxt.addValue(4.0, series2, type6);
dataset_zxt.addValue(2.0, series2, type7);
dataset_zxt.addValue(1.0, series2, type8);
dataset_zxt.addValue(4.0, series3, type1);
dataset_zxt.addValue(3.0, series3, type2);
dataset_zxt.addValue(2.0, series3, type3);
dataset_zxt.addValue(3.0, series3, type4);
dataset_zxt.addValue(6.0, series3, type5);
dataset_zxt.addValue(3.0, series3, type6);
dataset_zxt.addValue(4.0, series3, type7);
dataset_zxt.addValue(3.0, series3, type8);
JFreeChart mzxtChart = ChartFactory.createLineChart(
"折线图",
"时间",
"数量",
dataset_zxt,
PlotOrientation.VERTICAL,
true,
true,
false);
CategoryPlot mzxtPlot = (CategoryPlot)mzxtChart.getPlot();
mzxtPlot.setBackgroundPaint(Color.LIGHT_GRAY);
mzxtPlot.setRangeGridlinePaint(Color.BLUE);//背景底部横虚线
mzxtPlot.setOutlinePaint(Color.RED);//边界线
mzxtChart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12));//图列
CategoryAxis mzxtdomainAxis = mzxtPlot.getDomainAxis(); //X坐标
mzxtdomainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11)); //X
mzxtdomainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
ValueAxis mzxtValueAxis = mzxtPlot.getRangeAxis();
mzxtValueAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12)); //Y
mzxtValueAxis.setLabelFont(new Font("黑体", Font.PLAIN, 12));
TextTitle zxttextTitle = mzxtChart.getTitle();//坐标标题设置
zxttextTitle.setFont(new Font("黑体", Font.PLAIN, 20));
String zxtfilename = ServletUtilities.saveChartAsPNG(mzxtChart, 800, 400, null, session);
String zxtgraphURL = request.getContextPath() + "/DisplayChart?filename=" + zxtfilename;
//===========================折线图测试结束===================================================
%>
<img src="<%= graphURL %>" width=800 height=400 border=0 usemap="#<%= filename %>">
<br/>
<img src="<%= piegraphURL %>" width=800 height=400 border=0 usemap="#<%= piefilename %>">
<br/>
<img src="<%= zxtgraphURL %>" width=800 height=400 border=0 usemap="#<%= zxtfilename %>">