1. eclipse (replaceable)
2,jfreechart-1.0.19
2 Description:(1) source directory: it's the source directory of jfreechart; I won't see it here. Because his documents are charged.
(2) lib Directory: it is the package directory. The packages we need to pay attention to are jfreechart-1.0.10.jar, gnujaxp.jar and jcommon-1.0.13.jar;
(3) jfreechart-1.0.10-demo.jar in the root directory is an example program. You can see the running results of many examples after double clicking.
Java web development process3.1 import jar package
Import all jar packages under jfreechart-1.0.19/lib into the directory "/ WEB-INF/lib"
3.2 modify configuration file
Add the following configuration in the web.xml file, and try to configure it in front of other servlet configurations with low priority:
<servlet> <servlet-name>DisplayChart</servlet-name> <servlet-class> org.jfree.chart.servlet.DisplayChart <!--This is fixed--> </servlet-class> </servlet> <servlet-mapping> <servlet-name>DisplayChart</servlet-name> <url-pattern>/DisplayChart</url-pattern> </servlet-mapping>
3.3 write jsp file
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="org.jfree.data.general.DefaultPieDataset" %> <%@ page import="org.jfree.chart.ChartFactory" %> <%@ page import="org.jfree.chart.JFreeChart" %> <%@ page import="org.jfree.chart.servlet.*" %> <%@ page import="org.jfree.chart.StandardChartTheme" %> <%@ page import="java.awt.Font" %> <%@page import="org.jfree.chart.servlet.ServletUtilities"%> <%@ page import="org.jfree.chart.plot.PlotOrientation"%> <%@ page import="org.jfree.data.category.DefaultCategoryDataset"%> <!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>Data analysis</title> </head> <body> <!-- Pie chart --> <% DefaultPieDataset dpd = new DefaultPieDataset(); dpd.setValue("Management", 25); dpd.setValue("Market personnel", 25); dpd.setValue("Developer", 45); dpd.setValue("Other personnel", 10); //This section is to prevent the use of random code StandardChartTheme standardChartTheme=new StandardChartTheme("CN"); //Create a theme style standardChartTheme.setExtraLargeFont(new Font("Official script",Font.BOLD,20)); //Set title font standardChartTheme.setRegularFont(new Font("Song Shu",Font.PLAIN,15)); //Set font for Legend standardChartTheme.setLargeFont(new Font("Song Shu",Font.PLAIN,15)); //Set axial font ChartFactory.setChartTheme(standardChartTheme); //Apply theme styles JFreeChart chart = ChartFactory.createPieChart("Organization chart of a company",dpd, true, false, false); String fileName = ServletUtilities.saveChartAsPNG(chart,800,600,session); //ServletUtilities Is oriented web Development tool class, return a string filename,The file name is generated automatically, and the generated image will be placed on the server automatically( tomcat)Under the temporary documents of( temp) String url = request.getContextPath() + "/DisplayChart?filename=" + fileName; //According to the file name, go to the temporary directory to find the picture, here/DisplayChart The path should be consistent with the user-defined path in the configuration file<url-pattern>Agreement %> <img src="<%= url %>" width="400" height="350"> <!-- Histogram --> <% DefaultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(0.2, "Guangzhou", "Pork"); dataset.addValue(0.4, "Guangzhou", "beef"); dataset.addValue(0.1, "Guangzhou", "chicken"); dataset.addValue(0.1, "Guangzhou", "fish"); // Create a theme style StandardChartTheme standardChartTheme1 = new StandardChartTheme("CN"); // Set title font standardChartTheme1.setExtraLargeFont(new Font("Official script", Font.BOLD, 20)); // Set font for Legend standardChartTheme1.setRegularFont(new Font("Song Shu", Font.PLAIN, 15)); // Set axial font standardChartTheme1.setLargeFont(new Font("Song Shu", Font.PLAIN, 15)); // Apply theme styles ChartFactory.setChartTheme(standardChartTheme1); JFreeChart chart1 = ChartFactory.createBarChart3D("Statistics of meat sales", "meat", "% of sales(%)", dataset, PlotOrientation.VERTICAL, false, false, false); String filename = ServletUtilities.saveChartAsPNG(chart1, 1200, 300, null, session); String graphURL = request.getContextPath() + "/DisplayChart?filename=" + filename; System.out.println(graphURL + "\n"+ filename); %> <img src="<%= graphURL %>"width=1200 height=300 border=0 usemap="#<%= filename %>"> </body> </html>4 Effect Picture
Attached jar download address: http://www.java2s.com/Code/Jar/CatalogJar.htm