1、利用 JFreeChart 创建垂直柱状报表
1 package com.wcy.chart.bar;
2
3 import javax.servlet.http.HttpSession;
4
5 import org.jfree.chart.ChartFactory;
6 import org.jfree.chart.JFreeChart;
7 import org.jfree.chart.plot.PlotOrientation;
8 import org.jfree.chart.servlet.ServletUtilities;
9 import org.jfree.data.category.DefaultCategoryDataset;
10
11 public class BarChart1 {
12
13 public static String genBarChart(HttpSession session) throws Exception {
14 DefaultCategoryDataset dataset = new DefaultCategoryDataset();
15 dataset.addValue(510, "深圳", "苹果");
16 dataset.addValue(320, "深圳", "香蕉");
17 dataset.addValue(580, "深圳", "橘子");
18 dataset.addValue(390, "深圳", "梨子");
19 JFreeChart chart=ChartFactory.createBarChart3D("水果销售统计图", "水果", "销售", dataset,
20 PlotOrientation.VERTICAL, true, true, true);
21 String fileName=ServletUtilities.saveChartAsPNG(chart, 700, 500, null,session);
22 return fileName;
23 }
24 }
1 <%@page import="com.wcy.chart.bar.BarChart1"%> 2 <%@ page language="java" contentType="text/html; charset=UTF-8" 3 pageEncoding="UTF-8"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>Insert title here</title> 9 </head> 10 <body> 11 <% 12 String fileName = BarChart1.genBarChart(session); 13 %> 14 <img src="DisplayChart?filename=<%=fileName %>" width="700" height="500" border="0"> 15 </body> 16 </html>
2、利用 JFreeChart 创建横向柱状报表
1 package com.wcy.chart.bar;
2
3 import javax.servlet.http.HttpSession;
4
5 import org.jfree.chart.ChartFactory;
6 import org.jfree.chart.JFreeChart;
7 import org.jfree.chart.plot.PlotOrientation;
8 import org.jfree.chart.servlet.ServletUtilities;
9 import org.jfree.data.category.DefaultCategoryDataset;
10
11 public class BarChart2 {
12
13 public static String genBarChart(HttpSession session)throws Exception{
14 DefaultCategoryDataset dataset = new DefaultCategoryDataset();
15 dataset.addValue(510, "深圳", "苹果");
16 dataset.addValue(320, "深圳", "香蕉");
17 dataset.addValue(580, "深圳", "橘子");
18 dataset.addValue(390, "深圳", "梨子");
19 JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图", "水果", "销售", dataset, PlotOrientation.HORIZONTAL, true,true, true);
20 String fileName = ServletUtilities.saveChartAsPNG(chart, 700, 500, null, session);
21 return fileName;
22 }
23 }
1 <%@page import="com.wcy.chart.bar.BarChart2"%> 2 <%@ page language="java" contentType="text/html; charset=UTF-8" 3 pageEncoding="UTF-8"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>Insert title here</title> 9 </head> 10 <body> 11 <% 12 String fileName = BarChart2.genBarChart(session); 13 %> 14 <img src="DisplayChart?filename=<%=fileName %>" width="700" height="500" border="0"> 15 </body> 16 </html>
声明：此程序代码本人只是用于学习总结，非原创，如有侵权，联系本人。
时间： 2025-01-05 23:34:07