使用JFreeChart生成复杂柱状图实例（生成图片）（转）
package com.lhhc.jfreechart.test;import java.awt.Font;import java.io.FileOutputStream;import java.io.IOException;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartUtilities;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.CategoryAxis;import org.jfree.chart.axis.CategoryLabelPositions;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.plot.CategoryPlot;import org.jfree.chart.plot.PlotOrientation;import org.jfree.chart.title.LegendTitle;import org.jfree.chart.title.TextTitle;import org.jfree.data.category.CategoryDataset;import org.jfree.data.category.DefaultCategoryDataset;public class BarChart3DDemo1 { /** * @param args */ public static void main(String[] args) throws IOException{ JFreeChart chart=ChartFactory.createBarChart3D( "图书销量统计图", "图书",//目录轴的显示标签 "销量",//数值轴的显示标签 getDataSet(), PlotOrientation.VERTICAL,//设置图表方向 true,//复杂柱状图 false, false ); //取得统计图表的第一个图例 LegendTitle legend =chart.getLegend(0); //修改图例的字体 legend.setItemFont(new Font("宋体",Font.BOLD,14)); //设置标题 chart.setTitle(new TextTitle("图书销量统计图",new Font("黑体",Font.ITALIC,22))); //设置图表部分 CategoryPlot plot=(CategoryPlot)chart.getPlot(); CategoryAxis categoryAxis=plot.getDomainAxis();//取得横轴 categoryAxis.setLabelFont(new Font("宋体",Font.BOLD,22));//设置横轴显示标签的字体 categoryAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);//分类标签以４５度倾斜 categoryAxis.setTickLabelFont(new Font("宋体",Font.BOLD,18));//分类标签字体 NumberAxis numberAxis=(NumberAxis)plot.getRangeAxis();//取得纵轴 numberAxis.setLabelFont(new Font("宋体",Font.BOLD,42));//设置纵轴显示标签字体 FileOutputStream fos=null; fos=new FileOutputStream("book2.jpg"); ChartUtilities.writeChartAsJPEG( fos, 1, chart, 800, 600, null ); fos.close(); } private static CategoryDataset getDataSet(){ DefaultCategoryDataset dataset=new DefaultCategoryDataset(); dataset.addValue(47000,"北京", "Spring2.0宝典"); dataset.addValue(38000,"北京","轻量级的J@EEE"); dataset.addValue(38000, "北京", "JavaScript权威指南"); dataset.addValue(25000, "北京", "Ajax In Action"); dataset.addValue(37000,"上海", "Spring2.0宝典"); dataset.addValue(37000,"上海","轻量级的J@EEE"); dataset.addValue(24000, "上海", "JavaScript权威指南"); dataset.addValue(26000, "上海", "Ajax In Action"); dataset.addValue(17000,"广州", "Spring2.0宝典"); dataset.addValue(48000,"广州","轻量级的J@EEE"); dataset.addValue(21000, "广州", "JavaScript权威指南"); dataset.addValue(35000, "广州", "Ajax In Action"); dataset.addValue(46000,"长春", "Spring2.0宝典"); dataset.addValue(21000,"长春","轻量级的J@EEE"); dataset.addValue(22000, "长春", "JavaScript权威指南"); dataset.addValue(22000, "长春", "Ajax In Action"); return dataset; }}?
载自：http://blog.csdn.net/shz2008bj/archive/2008/01/31/2075944.aspx