JFreeChart -- 柱状图实例解析

JFreeChart -- 柱状图实例解析

2D柱状图   package com; import java.io.File; import org.jfree.chart.ChartColor; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartFrame; import org.jfree.chart.ChartUtilities; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.data.category.DefaultCategoryDataset; public class BarChartExample {   public static void main(String[] args)  {   // 创建一个柱状图   DefaultCategoryDataset dataset = new DefaultCategoryDataset();   // 装载数据   dataset.setValue(6, "Profit", "Jane");   dataset.setValue(3, "Profit2", "Jane");   dataset.setValue(7, "Profit", "Tom");   dataset.setValue(6, "Profit2", "Tom");   dataset.setValue(8, "Profit", "Jill");   dataset.setValue(9, "Profit2", "Jill");   dataset.setValue(5, "Profit", "John");   dataset.setValue(8, "Profit2", "John");   dataset.setValue(12, "Profit", "Fred");   dataset.setValue(11, "Profit2", "Fred");        // 产生柱状图   // JFreeChart chart = ChartFactory.createXYLineChart("标题"，"x轴标志","y轴标志","设置数据","设置图形显示方向",是否显示图形,是否进行提示,是否配置报表存放地址);   // 图形显示方向：   // (1)HORIZONTAL:横向显示图形   // (2)VERTICAL:纵向显示图形      // 2D柱状图   JFreeChart chart = ChartFactory.createBarChart("销售统计图","Salesman", "Profit", dataset, PlotOrientation.VERTICAL,false, true, false);   try{    //   // 创建图形显示面板 //   ChartFrame cf = new ChartFrame("柱状图",chart); //   cf.pack(); //   // 设置图片大小 //   cf.setSize(500,300); //   // 设置图形可见 //   cf.setVisible(true);         // 保存图片到指定文件夹     ChartUtilities.saveChartAsJPEG(new File("C:\\BarChart.jpg"), chart, 500, 300);   } catch (Exception e){    System.err.println("Problem occurred creating chart.");   }  } } 引自： http://www.cublog.cn/u1/37105/showart_405697.html