Java 报表之JFreeChart(第一讲)

时间：2023-03-09 07:38:07
Java 报表之JFreeChart(第一讲)

1、利用 JFreeChart 创建垂直柱状报表

 package com.wcy.chart.bar;

 import javax.servlet.http.HttpSession;

 import org.jfree.chart.ChartFactory;

 import org.jfree.chart.JFreeChart;

 import org.jfree.chart.plot.PlotOrientation;

 import org.jfree.chart.servlet.ServletUtilities;

 import org.jfree.data.category.DefaultCategoryDataset;

 public class BarChart1 {

     public static String genBarChart(HttpSession session) throws Exception {

         DefaultCategoryDataset dataset = new DefaultCategoryDataset();

         dataset.addValue(510, "深圳", "苹果");

         dataset.addValue(320, "深圳", "香蕉");

         dataset.addValue(580, "深圳", "橘子");

         dataset.addValue(390, "深圳", "梨子");

         JFreeChart chart=ChartFactory.createBarChart3D("水果销售统计图", "水果", "销售", dataset,

                 PlotOrientation.VERTICAL, true, true, true);

         String fileName=ServletUtilities.saveChartAsPNG(chart, 700, 500, null,session);

         return fileName;

     }

 }
 <%@page import="com.wcy.chart.bar.BarChart1"%>

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <title>Insert title here</title>

 </head>

 <body>

 <%

     String fileName = BarChart1.genBarChart(session);

 %>

 <img src="DisplayChart?filename=<%=fileName %>" width="700" height="500" border="0">

 </body>

 </html>

2、利用 JFreeChart 创建横向柱状报表

 package com.wcy.chart.bar;

 import javax.servlet.http.HttpSession;

 import org.jfree.chart.ChartFactory;

 import org.jfree.chart.JFreeChart;

 import org.jfree.chart.plot.PlotOrientation;

 import org.jfree.chart.servlet.ServletUtilities;

 import org.jfree.data.category.DefaultCategoryDataset;

 public class BarChart2 {

     public static String genBarChart(HttpSession session)throws Exception{

         DefaultCategoryDataset dataset = new DefaultCategoryDataset();

         dataset.addValue(510, "深圳", "苹果");

         dataset.addValue(320, "深圳", "香蕉");

         dataset.addValue(580, "深圳", "橘子");

         dataset.addValue(390, "深圳", "梨子");

         JFreeChart chart = ChartFactory.createBarChart3D("水果销量统计图", "水果", "销售", dataset, PlotOrientation.HORIZONTAL, true,true, true);

         String fileName = ServletUtilities.saveChartAsPNG(chart, 700, 500, null, session);

         return fileName;

     }

 }
 <%@page import="com.wcy.chart.bar.BarChart2"%>

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <title>Insert title here</title>

 </head>

 <body>

 <%

     String fileName = BarChart2.genBarChart(session);

 %>

 <img alt="" src="DisplayChart?filename=<%=fileName %>" width="700" height="500" border="0">

 </body>

 </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。

相关文章