jfreechart制作的饼形图

最新推荐文章于 2021-02-23 20:27:32 发布

ningliuliu

最新推荐文章于 2021-02-23 20:27:32 发布

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文章标签： jfreechart JSP Servlet HTML

本文链接：https://blog.youkuaiyun.com/ningliuliu/article/details/83766390

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<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%@page import="org.jfree.data.category.DefaultCategoryDataset"%>
<%@page import="org.jfree.chart.JFreeChart"%>
<%@page import="org.jfree.chart.ChartFactory"%>
<%@page import="org.jfree.chart.plot.PlotOrientation"%>
<%@page import="org.jfree.chart.servlet.ServletUtilities"%>
<%@page import="org.jfree.data.category.CategoryDataset"%>
<%@page import="org.jfree.data.general.DatasetUtilities"%>

<%@page import="java.awt.Color"%>

<%@page import="org.jfree.chart.axis.CategoryAxis"%>
<%@page import="org.jfree.chart.axis.ValueAxis"%>
<%@page import="org.jfree.chart.renderer.category.BarRenderer3D"%>
<%@page import="org.jfree.chart.labels.StandardCategoryItemLabelGenerator"%>
<%@page import="org.jfree.chart.axis.AxisLocation"%>
<%@page import="org.jfree.chart.plot.CategoryPlot"%>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'ceshi.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


</head>

<%

//*DefaultCategoryDataset dataset=new DefaultCategoryDataset();
//dataset.addValue(20,"上海","苹果");
//dataset.addValue(50,"上海","香蕉");
//dataset.addValue(20,"上海","梨");
//dataset.addValue(15,"上海","葡萄");
//dataset.addValue(90,"上海","芒果");
//dataset.addValue(70,"上海","火龙果");
double[][] data = new double[][] {{672, 766, 223, 540, 126}, {325, 521, 210, 340, 106}, {332, 256, 523, 240, 526}};
String[] rowKeys = {"苹果","梨子","葡萄"};
String[] columnKeys = {"北京","上海","广州","成都","深圳"};
CategoryDataset dataset = DatasetUtilities.createCategoryDataset(rowKeys, columnKeys, data);

JFreeChart chart=ChartFactory.createBarChart3D("水果销量统计图",
"水果",
"销量",
dataset,
PlotOrientation.VERTICAL,
false,false,false);
chart.setBackgroundPaint(Color.WHITE);
CategoryPlot plot = chart.getCategoryPlot();

CategoryAxis domainAxis = plot.getDomainAxis();
//domainAxis.setVerticalCategoryLabels(true);
plot.setDomainAxis(domainAxis);

ValueAxis rangeAxis = plot.getRangeAxis();
//设置最高的一个 Item 和图片顶端的距离
rangeAxis.setUpperMargin(0.15);
//设置最低的一个 Item 和图片底端的距离
rangeAxis.setLowerMargin(0.15);
plot.setRangeAxis(rangeAxis);

BarRenderer3D renderer = new BarRenderer3D();
renderer.setBaseOutlinePaint(Color.BLACK);
//设置 Wall 的颜色
renderer.setWallPaint(Color.gray);
//设置每种水果代表的柱的颜色
renderer.setSeriesPaint(0, new Color(0, 0, 255));
renderer.setSeriesPaint(1, new Color(0, 100, 255));
renderer.setSeriesPaint(2, Color.GREEN);
//设置每个地区所包含的平行柱的之间距离
renderer.setItemMargin(0.1);
//显示每个柱的数值，并修改该数值的字体属性
renderer.setItemLabelGenerator(new StandardCategoryItemLabelGenerator());
renderer.setItemLabelsVisible(true);
plot.setRenderer(renderer);

//设置柱的透明度
plot.setForegroundAlpha(0.6f);
//设置地区、销量的显示位置
plot.setDomainAxisLocation(AxisLocation.TOP_OR_RIGHT);
plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);

String filename=ServletUtilities.saveChartAsPNG(chart,500,300,null,session) ;
String grophURL=request.getContextPath()+"/servlet/DisplayChart?filename="+filename;

%>
<body>
This is my JSP page. <br>
<img src="<%=grophURL %>" width="500" height="300" border="0" usemap="#<%=filename %>">
</body>
</html>