复杂柱状图

<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="org.jfree.chart.ChartFactory, org.jfree.chart.plot.CategoryPlot,java.awt.Font,org.jfree.chart.plot.PlotOrientation, org.jfree.chart.title.TextTitle,org.jfree.chart.axis.CategoryAxis,  org.jfree.chart.axis.NumberAxis,       org.jfree.chart.JFreeChart,           org.jfree.chart.plot.PlotOrientation,               org.jfree.chart.JFreeChart,              org.jfree.chart.plot.PlotOrientation,          org.jfree.chart.servlet.ServletUtilities,      org.jfree.data.category.CategoryDataset,
org.jfree.data.general.DatasetUtilities,
                 org.jfree.chart.plot.*,
                 org.jfree.chart.labels.*,
org.jfree.chart.renderer.category.BarRenderer3D,
                 java.awt.*,
                 org.jfree.ui.*,             org.jfree.chart.axis.AxisLocation"%>
<%
double[][] data = new double[][] {{1310, 1220, 1110, 1000},
    {720, 700, 680, 640},
    {1130, 1020, 980, 800},
    {440, 400, 360, 300}};
String[] rowKeys = {"猪肉", "牛肉","鸡肉", "鱼肉"};
String[] columnKeys = {"广州", "深圳", "东莞", "佛山"};
CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);

JFreeChart chart = ChartFactory.createBarChart3D("肉类销量统计图",
                  "肉类",
                  "销量",
                  dataset,
                  PlotOrientation.VERTICAL,
                  true,
                  true,
                  false);

CategoryPlot plot = chart.getCategoryPlot();
//设置网格背景颜色
plot.setBackgroundPaint(Color.white);
//设置网格竖线颜色
plot.setDomainGridlinePaint(Color.pink);
//设置网格横线颜色
plot.setRangeGridlinePaint(Color.pink);
//显示每个柱的数值，并修改该数值的字体属性

BarRenderer3D renderer = new BarRenderer3D();
renderer.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
renderer.setBaseItemLabelsVisible(true);
//默认的数字显示在柱子中，通过如下两句可调整数字的显示
//注意：此句很关键，若无此句，那数字的显示会被覆盖，给人数字没有显示出来的问题
renderer.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT));
renderer.setItemLabelAnchorOffset(10D);
//设置每个地区所包含的平行柱的之间距离
//renderer.setItemMargin(0.3);
plot.setRenderer(renderer);
//设置地区、销量的显示位置
//将下方的“肉类”放到上方
plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);
//将默认放在左边的“销量”放到右方
plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);

  //图表标题以及副标题乱码                  
Font font = new Font("宋体", Font.BOLD, 16);
TextTitle title = new TextTitle("肉类销量统计图", font);
//副标题
TextTitle subtitle = new TextTitle("副标题", new Font("黑体", Font.BOLD, 12));

chart.addSubtitle(subtitle);

chart.setTitle(title); //标题    
         
//CategoryPlot plot = chart.getCategoryPlot();               
NumberAxis numberaxis = (NumberAxis) plot.getRangeAxis();

CategoryAxis domainAxis = plot.getDomainAxis(); 
  //X轴乱码
domainAxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 11));
domainAxis.setLabelFont(new Font("宋体", Font.PLAIN, 12));
//Y轴乱码            
numberaxis.setTickLabelFont(new Font("sans-serif", Font.PLAIN, 12)); 
numberaxis.setLabelFont(new Font("黑体", Font.PLAIN, 12)); 
     //图表底部乱码
     chart.getLegend().setItemFont(new Font("宋体", Font.PLAIN, 12)); 


String filename = ServletUtilities.saveChartAsPNG(chart, 700, 400, null, session);
String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename;
%>
<img src="<%= graphURL %>"width=700 height=400 border=0 usemap="#<%= filename %>">