a.jsp
代码:
<%@ page language="java"
import="org.jfree.chart.*,org.jfree.data.general.DefaultPieDataset,org.jfree.chart.plot.PiePlot3D,java.awt.Font,org.jfree.chart.JFreeChart,org.jfree.chart.title.TextTitle,org.jfree.chart.title.LegendTitle,org.jfree.chart.labels.StandardPieToolTipGenerator,org.jfree.chart.urls.StandardPieURLGenerator,org.jfree.chart.entity.StandardEntityCollection,java.io.PrintWriter,org.jfree.chart.servlet.ServletUtilities"
pageEncoding="utf-8"%>
<%
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 'a.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<%
DefaultPieDataset data = new DefaultPieDataset();
data.setValue("Spring2.0宝典", 47000);
data.setValue("轻量级J2EE企业应用实战", 38000);
data.setValue("基于J2EE的Ajax宝典", 31000);
data.setValue("Ajax in Action", 25000);
data.setValue("JavaScript权威指南", 29000);
PiePlot3D plot = new PiePlot3D(data);
plot.setLabelFont(new Font("隶书", Font.BOLD, 16));
JFreeChart chart = new JFreeChart("",
JFreeChart.DEFAULT_TITLE_FONT, plot, true);
chart.setTitle(new TextTitle("图书销量统计图", new Font("黑体", Font.ITALIC,
22)));
LegendTitle legend = chart.getLegend(0);
legend.setItemFont(new Font("宋体", Font.BOLD,18));
plot.setToolTipGenerator(new StandardPieToolTipGenerator());
plot.setURLGenerator(new StandardPieURLGenerator("jfreechart/b.jsp"));
StandardEntityCollection entityCollection = new StandardEntityCollection();
ChartRenderingInfo info = new ChartRenderingInfo(entityCollection);
PrintWriter pw = new PrintWriter(out);
String filename = ServletUtilities.saveChartAsPNG(chart, 720, 450,
info, null);
ChartUtilities.writeImageMap(pw, "map0", info, false);
%>
<body>
<img src="DisplayChart?filename=<%=filename%>" width="720"
height="450" usemap="#map0" />
</body>
</html>
b.jsp
代码:
<%@ page language="java"
import="org.jfree.chart.*,java.awt.Font,org.jfree.chart.JFreeChart,org.jfree.chart.title.TextTitle,org.jfree.chart.title.LegendTitle,org.jfree.chart.servlet.ServletUtilities,org.jfree.chart.plot.PlotOrientation,org.jfree.chart.plot.CategoryPlot,org.jfree.chart.axis.NumberAxis,org.jfree.chart.axis.CategoryAxis,org.jfree.chart.axis.CategoryLabelPositions,org.jfree.data.category.CategoryDataset,org.jfree.data.category.DefaultCategoryDataset"
pageEncoding="UTF-8"%>
<%
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 'b.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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
CategoryDataset dataset;
String queryString = request.getQueryString();
queryString = java.net.URLDecoder.decode(queryString, "UTF-8");
String category = null;
String[] queryStrings=queryString.split("&");
for (int i = 0; i < queryStrings.length; i++) {
String[] nameValue = queryStrings[i].split("=");
category = nameValue[0].equals("category") ? nameValue[1]
: category;
}
String subTitle = "";
if (category.equals("Spring2.0宝典")
|| category.equals("轻量级J2EE企业应用实战")
|| category.equals("基于J2EE的Ajax宝典")) {
dataset = leeGetDataSet();
subTitle = "作者李刚的";
} else {
dataset = getDataSet();
subTitle = "其它";
}
String title = subTitle + "图书的销售情况";
JFreeChart chart = ChartFactory.createBarChart3D(title, "月份", "销量",
dataset, PlotOrientation.VERTICAL, true, false, false);
chart.setTitle(new TextTitle(title, new Font("黑体", Font.ITALIC,
22)));
LegendTitle legend = chart.getLegend(0);
legend.setItemFont(new Font("宋体", Font.BOLD, 20));//设置图例的字体
CategoryPlot plot = (CategoryPlot) chart.getPlot();
CategoryAxis categoryAxis = plot.getDomainAxis();//取得横轴
categoryAxis.setLabelFont(new Font("宋体", Font.BOLD, 22));//设置横轴显示标签的字体
categoryAxis
.setCategoryLabelPositions(CategoryLabelPositions.UP_45);//分类标签以45度倾斜
categoryAxis.setTickLabelFont(new Font("宋体", Font.BOLD, 18));//分类标签字体
NumberAxis numberAxis = (NumberAxis) plot.getRangeAxis();//取得纵轴
numberAxis.setLabelFont(new Font("宋体", Font.BOLD, 22));
String filename = ServletUtilities.saveChartAsPNG(chart, 650, 390,
null, session);
%>
<img src="DisplayChart?filename=<%=filename%>" width="720"
height="450" border="0" />
</body>
<%!private static CategoryDataset getDataSet() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(47000, "Ajax in Action", "06年10月");
dataset.addValue(38000, "Ajax in Action", "06年11月");
dataset.addValue(31000, "Ajax in Action", "06年12月");
dataset.addValue(25000, "Ajax in Action", "07年01月");
dataset.addValue(45000, "Ajax in Action", "07年02月");
dataset.addValue(28000, "Ajax in Action", "07年03月");
dataset.addValue(42000, "JavaScript权威指南", "06年10月");
dataset.addValue(31000, "JavaScript权威指南", "06年11月");
dataset.addValue(41000, "JavaScript权威指南", "06年12月");
dataset.addValue(35000, "JavaScript权威指南", "07年01月");
dataset.addValue(25000, "JavaScript权威指南", "07年02月");
dataset.addValue(18000, "JavaScript权威指南", "07年03月");
return dataset;
}
private static CategoryDataset leeGetDataSet() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(42000, "Spring2.0宝典", "06年10月");
dataset.addValue(18000, "Spring2.0宝典", "06年11月");
dataset.addValue(51000, "Spring2.0宝典", "06年12月");
dataset.addValue(25000, "Spring2.0宝典", "07年01月");
dataset.addValue(35000, "Spring2.0宝典", "07年02月");
dataset.addValue(26000, "Spring2.0宝典", "07年03月");
dataset.addValue(47000, "轻量级J2EE企业应用实战", "06年10月");
dataset.addValue(38000, "轻量级J2EE企业应用实战", "06年11月");
dataset.addValue(31000, "轻量级J2EE企业应用实战", "06年12月");
dataset.addValue(25000, "轻量级J2EE企业应用实战", "07年01月");
dataset.addValue(25000, "轻量级J2EE企业应用实战", "07年02月");
dataset.addValue(25000, "轻量级J2EE企业应用实战", "07年03月");
dataset.addValue(43000, "基于J2EE的Ajax宝典", "06年10月");
dataset.addValue(28000, "基于J2EE的Ajax宝典", "06年11月");
dataset.addValue(37000, "基于J2EE的Ajax宝典", "06年12月");
dataset.addValue(20000, "基于J2EE的Ajax宝典", "07年01月");
dataset.addValue(35000, "基于J2EE的Ajax宝典", "07年02月");
dataset.addValue(15000, "基于J2EE的Ajax宝典", "07年03月");
return dataset;
}%>
</html>
web.xml
代码:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<servlet>
<servlet-name>DisplayChart</servlet-name>
<servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DisplayChart</servlet-name>
<url-pattern>/DisplayChart</url-pattern>
</servlet-mapping>
</web-app>