JFreeChart -- 柱状图实例解析JFreeChart -- 柱状图实例解析 ?2D柱状图?package comimport java.io.File
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
