Jfreecharts简单使用

最新推荐文章于 2025-05-26 09:54:31 发布

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最新推荐文章于 2025-05-26 09:54:31 发布

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分类专栏：插件

本文链接：https://blog.youkuaiyun.com/qq931399960/article/details/43762399

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2 篇文章

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这篇博客介绍了JFreeChart的基本使用，包括需要的jar包和web.xml的配置，是一篇入门级的教程。

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一、使用到的jar：

二、web.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <!-- 这个版本好像是可以不用配置DisplayChart这个servlet -->
  <servlet>
    <servlet-name>display</servlet-name>
    <servlet-class>org.jfree.chart.servlet.DisplayChart</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>display</servlet-name>
    <url-pattern>/DisplayChart</url-pattern>
  </servlet-mapping>
  
  
  <servlet>
    <servlet-name>jfree</servlet-name>
    <servlet-class>controller.JfreeChartServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>jfree</servlet-name>
    <url-pattern>/jfree</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

三、相关类和页面

servlet:

package controller;

import java.awt.Color;
import java.awt.Font;
import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.general.DefaultKeyedValues2DDataset;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.RectangleInsets;

public class JfreeChartServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		doPost(request, response);
	}

	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		String flag = request.getParameter("flag");
		System.out.println(flag);
		if ("pie".equals(flag)) {
			this.pie(request, response);
		}
		if ("bar".equals(flag)) {
			this.bar(request, response);
		}
		if("line".equals(flag)){
			this.line(request, response);
		}
		if("line2".equals(flag)){
			this.line2(request, response);
		}
		if("time".equals(flag)){
			this.time(request, response);
		}
	}

	// 饼状图
	public void pie(HttpServletRequest request, HttpServletResponse response)
			throws IOException, ServletException {
		// 出现乱码，设置字体格式就可以解决乱码
		StandardChartTheme sct = new StandardChartTheme("CN");
		// 设置标题字体
		sct.setExtraLargeFont(new Font("隶书", Font.BOLD, 20));
		// 设置图例字体
		sct.setRegularFont(new Font("宋体", Font.PLAIN, 15));
		// 设置轴向字体
		sct.setLargeFont(new Font("宋体", Font.PLAIN, 15));
		// 应用主题样式
		ChartFactory.setChartTheme(sct);

		DefaultPieDataset dpd = new DefaultPieDataset();
		dpd.setValue("管理人员", 25);
		dpd.setValue("市场人员", 35);
		dpd.setValue("开发人员", 20);
		dpd.setValue("后勤人员", 5);
		dpd.setValue("财务人员", 15);

		JFreeChart a = ChartFactory.createPieChart("公司组织架构图", dpd, true, true,
				true);
		// ChartFrame frame = new ChartFrame("公司组织架构图", a,true);
		// frame.pack();
		// frame.setVisible(true);
		ChartUtilities
				.writeChartAsJPEG(response.getOutputStream(), a, 500, 300);
	}

	// 柱状图
	public void bar(HttpServletRequest request, HttpServletResponse response)
			throws IOException {

		DefaultCategoryDataset dataset = new DefaultCategoryDataset();

		dataset.addValue(100, "北京", "苹果");
		dataset.addValue(100, "上海", "苹果");
		dataset.addValue(100, "广州", "苹果");
		dataset.addValue(200, "北京", "梨子");
		dataset.addValue(200, "上海", "梨子");
		dataset.addValue(200, "广州", "梨子");
		dataset.addValue(300, "北京", "葡萄");
		dataset.addValue(300, "上海", "葡萄");
		dataset.addValue(300, "广州", "葡萄");
		dataset.addValue(400, "北京", "香蕉");
		dataset.addValue(400, "上海", "香蕉");
		dataset.addValue(400, "广州", "香蕉");
		dataset.addValue(500, "北京", "荔枝");
		dataset.addValue(500, "上海", "荔枝");
		dataset.addValue(500, "广州", "荔枝");

		JFreeChart chart = ChartFactory.createBarChart3D("水果产量图", "水果", "水果",
				dataset, PlotOrientation.VERTICAL, true, true, true);

		// ChartFrame frame=new ChartFrame ("水果产量图 ",chart,true);
		// frame.pack();
		// frame.setVisible(true);

		ChartUtilities.writeChartAsJPEG(response.getOutputStream(), chart, 500,
				300);
	}
//折线图01
	public void line(HttpServletRequest request,HttpServletResponse response) throws IOException {
		String series1 = "First";
		String series2 = "Second";
		String series3 = "Third";
		String type1 = "2001";
		String type2 = "2002";
		String type3 = "2003";
		String type4 = "2004";
		String type5 = "2005";
		String type6 = "2006";
		String type7 = "2007";
		String type8 = "2008";
		DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
		defaultcategorydataset.addValue(1.0D, series1, type1);
		defaultcategorydataset.addValue(4D, series1, type2);
		defaultcategorydataset.addValue(3D, series1, type3);
		defaultcategorydataset.addValue(5D, series1, type4);
		defaultcategorydataset.addValue(5D, series1, type5);
		defaultcategorydataset.addValue(7D, series1, type6);
		defaultcategorydataset.addValue(7D, series1, type7);
		defaultcategorydataset.addValue(8D, series1, type8);
		defaultcategorydataset.addValue(5D, series2, type1);
		defaultcategorydataset.addValue(7D, series2, type2);
		defaultcategorydataset.addValue(6D, series2, type3);
		defaultcategorydataset.addValue(8D, series2, type4);
		defaultcategorydataset.addValue(4D, series2, type5);
		defaultcategorydataset.addValue(4D, series2, type6);
		defaultcategorydataset.addValue(2D, series2, type7);
		defaultcategorydataset.addValue(1.0D, series2, type8);
		defaultcategorydataset.addValue(4D, series3, type1);
		defaultcategorydataset.addValue(3D, series3, type2);
		defaultcategorydataset.addValue(2D, series3, type3);
		defaultcategorydataset.addValue(3D, series3, type4);
		defaultcategorydataset.addValue(6D, series3, type5);
		defaultcategorydataset.addValue(3D, series3, type6);
		defaultcategorydataset.addValue(4D, series3, type7);
		defaultcategorydataset.addValue(3D, series3, type8);
		JFreeChart chart = ChartFactory.createLineChart("折线图 Demo 1",
		"Type", "Value",
		defaultcategorydataset, PlotOrientation.VERTICAL,true, true, false);
		CategoryPlot categoryplot = (CategoryPlot) chart.getPlot();
		categoryplot.setBackgroundPaint(Color.lightGray);
		categoryplot.setRangeGridlinePaint(Color.white);
//		ChartFrame frame = new ChartFrame("折线图 ", jfreechart, true);
//		frame.pack();
//		frame.setVisible(true);
		ChartUtilities.writeChartAsJPEG(response.getOutputStream(), chart, 500,300);
	}
//折线图02
	public void line2(HttpServletRequest request,HttpServletResponse response) throws IOException{
	       XYSeries xyseries = new XYSeries("First");
	       xyseries.add(1.0D, 1.0D);
	       xyseries.add(2D, 4D);
	       xyseries.add(3D, 3D);
	       xyseries.add(4D, 5D);
	       xyseries.add(5D, 5D);
	       xyseries.add(6D, 7D);
	       xyseries.add(7D, 7D);
	       xyseries.add(8D, 8D);

	       XYSeries xyseries1 = new XYSeries("Second");
	       xyseries1.add(1.0D, 5D);
	       xyseries1.add(2D, 7D);
	       xyseries1.add(3D, 6D);
	       xyseries1.add(4D, 8D);
	       xyseries1.add(5D, 4D);
	       xyseries1.add(6D, 4D);
	       xyseries1.add(7D, 2D);
	       xyseries1.add(8D, 1.0D);

	       XYSeries xyseries2 = new XYSeries("Third");
	       xyseries2.add(3D, 4D);
	       xyseries2.add(4D, 3D);
	       xyseries2.add(5D, 2D);
	       xyseries2.add(6D, 3D);
	       xyseries2.add(7D, 6D);
	       xyseries2.add(8D, 3D);
	       xyseries2.add(9D, 4D);
	       xyseries2.add(10D, 3D);

	       XYSeriesCollection xyseriescollection = new XYSeriesCollection(); //再用XYSeriesCollection添加入XYSeries 对象
	       xyseriescollection.addSeries(xyseries);
	       xyseriescollection.addSeries(xyseries1);
	       xyseriescollection.addSeries(xyseries2);

	       JFreeChart chart = ChartFactory.createXYLineChart("Line Chart Demo 2","X","Y",
	    		   							xyseriescollection,PlotOrientation.VERTICAL,true,true,false);
	       ChartFrame  frame=new ChartFrame ("折线图 ",chart,true);
//	       frame.pack();
//	       frame.setVisible(true);
	       ChartUtilities.writeChartAsJPEG(response.getOutputStream(), chart, 500,300);
	}
	public void time(HttpServletRequest request,HttpServletResponse response) throws IOException{
		//时间序列图

	       TimeSeries timeseries = new TimeSeries("L&G European Index Trust",Month.class);
	       timeseries.add(new Month(2, 2001), 181.8D);//这里用的是Month.class，同样还有Day.class Year.class 等等
	       timeseries.add(new Month(3, 2001), 167.3D);
	       timeseries.add(new Month(4, 2001), 153.8D);
	       timeseries.add(new Month(5, 2001), 167.6D);
	       timeseries.add(new Month(6, 2001), 158.8D);
	       timeseries.add(new Month(7, 2001), 148.3D);
	       timeseries.add(new Month(8, 2001), 153.9D);
	       timeseries.add(new Month(9, 2001), 142.7D);
	       timeseries.add(new Month(10, 2001), 123.2D);
	       timeseries.add(new Month(11, 2001), 131.8D);
	       timeseries.add(new Month(12, 2001), 139.6D);
	       timeseries.add(new Month(1, 2002), 142.9D);
	       timeseries.add(new Month(2, 2002), 138.7D);
	       timeseries.add(new Month(3, 2002), 137.3D);
	       timeseries.add(new Month(4, 2002), 143.9D);
	       timeseries.add(new Month(5, 2002), 139.8D);
	       timeseries.add(new Month(6, 2002), 137D);
	       timeseries.add(new Month(7, 2002), 132.8D);

	       TimeSeries timeseries1 = new TimeSeries("L&G UK Index Trust",Month.class);
	       timeseries1.add(new Month(2, 2001), 129.6D);
	       timeseries1.add(new Month(3, 2001), 123.2D);
	       timeseries1.add(new Month(4, 2001), 117.2D);
	       timeseries1.add(new Month(5, 2001), 124.1D);
	       timeseries1.add(new Month(6, 2001), 122.6D);
	       timeseries1.add(new Month(7, 2001), 119.2D);
	       timeseries1.add(new Month(8, 2001), 116.5D);
	       timeseries1.add(new Month(9, 2001), 112.7D);
	       timeseries1.add(new Month(10, 2001), 101.5D);
	       timeseries1.add(new Month(11, 2001), 106.1D);
	       timeseries1.add(new Month(12, 2001), 110.3D);
	       timeseries1.add(new Month(1, 2002), 111.7D);
	       timeseries1.add(new Month(2, 2002), 111D);
	       timeseries1.add(new Month(3, 2002), 109.6D);
	       timeseries1.add(new Month(4, 2002), 113.2D);
	       timeseries1.add(new Month(5, 2002), 111.6D);
	       timeseries1.add(new Month(6, 2002), 108.8D);
	       timeseries1.add(new Month(7, 2002), 101.6D);

	       TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
	       timeseriescollection.addSeries(timeseries);
	       timeseriescollection.addSeries(timeseries1);
	       timeseriescollection.setDomainIsPointsInTime(true); //domain轴上的刻度点代表的是时间点而不是时间段

	       JFreeChart chart = ChartFactory.createTimeSeriesChart("Legal & General Unit Trust Prices",
	              "Date",
	              "Price Per Unit",
	              timeseriescollection,
	              true,
	              true,
	              false);
	              chart.setBackgroundPaint(Color.white);
	              XYPlot xyplot = (XYPlot)chart.getPlot(); //获得 plot : XYPlot!!
	              xyplot.setBackgroundPaint(Color.lightGray);
	              xyplot.setDomainGridlinePaint(Color.white);
	              xyplot.setRangeGridlinePaint(Color.white);
	              xyplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));
	              xyplot.setDomainCrosshairVisible(true);
	              xyplot.setRangeCrosshairVisible(true);

	              ChartFrame  frame=new ChartFrame ("折线图 ",chart,true);
//	              frame.pack();
//	              frame.setVisible(true);
	              ChartUtilities.writeChartAsJPEG(response.getOutputStream(), chart, 500,300);
	}
}

index.jsp

<%@ 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>
<img alt="饼状图" src="${pageContext.request.contextPath }/jfree?flag=pie">
<img alt="柱状图" src="${pageContext.request.contextPath }/jfree?flag=bar">
<img alt="线状图" src="${pageContext.request.contextPath }/jfree?flag=line">
<img alt="线状图2" src="${pageContext.request.contextPath }/jfree?flag=line2">
<img alt="时间序列图" src="${pageContext.request.contextPath }/jfree?flag=time">
</body>
</html>

页面中直接通过：http://localhost:8080/A_jfreechart_/进行访问，A_jfreechart_为本项目项目名称。