<%@ page language="java" import="java.util.*" 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 'index.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>
This is my JSP page. <br>
饼形图<br/>
<img src="<%=request.getContextPath()%>/pie"/><br/>
折线图<br/>
<img src="<%=request.getContextPath()%>/line"/>
</body>
</html>
package com.helloweenvsfei.jfreechart;
import java.util.Random;
public class DataUtils {
private static Random random = new Random();
private static final int MAX_NUMBER = 100;
/**
* 随机在0到100间取数
* @return
*/
public static int getRandomData() {
return random.nextInt(MAX_NUMBER);
}
}
package com.helloweenvsfei.jfreechart;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.io.IOException;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.chart.ChartFactory;
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.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.HorizontalAlignment;
import org.jfree.ui.RectangleEdge;
public class LineChartServlet extends HttpServlet {
private static final long serialVersionUID = 1585397081043433662L;
public LineChartServlet() {
super();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置返回类型为图片
response.setContentType("image/png");
// 获取数据集对象
CategoryDataset dataset = createDataset();
// 创建图形对象
JFreeChart jfreechart = ChartFactory.createLineChart("08年图书销售量",
null, "销售量", dataset, PlotOrientation.VERTICAL, false, true,
false);
/*
// 设置图表的子标题
jfreechart.addSubtitle(new TextTitle("按月份"));
// 创建一个标题
TextTitle texttitle = new TextTitle("日期: " + new Date());
// 设置标题字体
texttitle.setFont(new Font("黑体", 0, 10));
// 设置标题向下对齐
texttitle.setPosition(RectangleEdge.BOTTOM);
// 设置标题向右对齐
texttitle.setHorizontalAlignment(HorizontalAlignment.RIGHT);
// 添加图表的子标题
jfreechart.addSubtitle(texttitle);
// 设置图表的背景色为白色
jfreechart.setBackgroundPaint(Color.white);
// 获得图表区域对象
CategoryPlot categoryplot = (CategoryPlot) jfreechart.getPlot();
categoryplot.setBackgroundPaint(Color.lightGray);
categoryplot.setRangeGridlinesVisible(false);
// 获显示线条对象
LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer) categoryplot
.getRenderer();
lineandshaperenderer.setBaseShapesVisible(true);
lineandshaperenderer.setDrawOutlines(true);
lineandshaperenderer.setUseFillPaint(true);
lineandshaperenderer.setBaseFillPaint(Color.white);
// 设置折线加粗
lineandshaperenderer.setSeriesStroke(0, new BasicStroke(3F));
lineandshaperenderer.setSeriesOutlineStroke(0, new BasicStroke(2.0F));
// 设置折线拐点
lineandshaperenderer.setSeriesShape(0,
new java.awt.geom.Ellipse2D.Double(-5D, -5D, 10D, 10D));
*/
// 将图表已数据流的方式返回给客户端
ChartUtilities.writeChartAsPNG(response.getOutputStream(), jfreechart,
500, 270);
}
/**
* 返回数据集
*
* @return
*/
private static CategoryDataset createDataset() {
DefaultCategoryDataset defaultdataset = new DefaultCategoryDataset();
for (int i = 1; i <= 12; i++) {
defaultdataset.addValue(DataUtils.getRandomData(), "JAVA", i + "月");
defaultdataset.addValue(DataUtils.getRandomData(), "PHP", i + "月");
}
return defaultdataset;
}
}
package com.helloweenvsfei.jfreechart;
import java.awt.Font;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
public class PieChartServlet extends HttpServlet {
private static final long serialVersionUID = -3798298158506030366L;
public PieChartServlet() {
super();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// 设置返回类型为图片
response.setContentType("image/png");
// 获取数据集对象
PieDataset dataset = createPieDataset();
// 创建图形对象
JFreeChart jfreechart = ChartFactory.createPieChart3D("08年图书销量排行榜",
dataset, true, true, false);
/*
// 获得图表区域对象
PiePlot pieplot = (PiePlot) jfreechart.getPlot();
// 设置图表区域的标签字体
pieplot.setLabelFont(new Font("宋体", 0, 12));
// 设置图表区域无数据时的默认显示文字
pieplot.setNoDataMessage("没有销售数据");
// 设置图表区域不是圆形，由于是3D的饼形图，建议设置为false
pieplot.setCircular(false);
// 设置图表区域文字与图表区域的间隔距离，0.02表示2%
pieplot.setLabelGap(0.02D);
*/
// 将图表已数据流的方式返回给客户端
ChartUtilities.writeChartAsPNG(response.getOutputStream(), jfreechart,
500, 270);
}
/**
* 返回数据集
*
* @return
*/
private static PieDataset createPieDataset() {
// 创建饼形图数据集对象
DefaultPieDataset defaultpiedataset = new DefaultPieDataset();
// 分别图形区域的说明和数据
defaultpiedataset.setValue("JAVA", DataUtils.getRandomData());
defaultpiedataset.setValue("C/C++", DataUtils.getRandomData());
defaultpiedataset.setValue("PHP", DataUtils.getRandomData());
defaultpiedataset.setValue("JavaScript", DataUtils.getRandomData());
defaultpiedataset.setValue("Ajax", DataUtils.getRandomData());
return defaultpiedataset;
}
}
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