Home Chartgraphs Create a bar chart in JSP page using JFreeChart

Create a bar chart in JSP page using JFreeChart
Posted on: September 2, 2008 at 12:00 AM

This Example shows you how to create a bar chart in JSP page using JFreeChart. Code given below creates a bar chart of scores of two teams in matches.

Create a bar chart in JSP page using JFreeChart

This Example shows you how to create a bar chart in JSP page using JFreeChart. Code given below creates a bar chart of scores of two teams in matches.

In the code given below we have extended class ApplicationFrame to create a frame and also pass a string value to the constructor of ApplicationFrame class by using super keyword that will be name of the created frame.

Methods used in this example are described below:

pack(): This method invokes the layout manager.

centerFrameOnScreen(): This method is used for the position of the frame in the middle of the screen.

setVisible(): This method is used for display frame on the screen.

createCategoryDataset(): This method is used to create the instance of CategoryDataset Interface and that contains a copy of the data in an array.

saveChartAsPNG(): This method is used to save chart in to png format.

jspbarchart.jsp




<%@page contentType="text/html" pageEncoding="UTF-8"%>



<%@ page  import="java.awt.*" %>

<%@ page  import="java.io.*" %>

<%@ page  import="org.jfree.chart.*" %>

<%@ page  import="org.jfree.chart.axis.*" %>

<%@ page  import="org.jfree.chart.entity.*" %>

<%@ page  import="org.jfree.chart.labels.*" %>

<%@ page  import="org.jfree.chart.plot.*" %>

<%@ page  import="org.jfree.chart.renderer.category.*" %>

<%@ page  import="org.jfree.chart.urls.*" %>

<%@ page  import="org.jfree.data.category.*" %>

<%@ page  import="org.jfree.data.general.*" %>



<%

  final double[][] data = new double[][]{

  {210, 300, 320, 265, 299},

  {200, 304, 201, 201, 340}

 };



	
  final CategoryDataset dataset = 

   DatasetUtilities.createCategoryDataset(

	
  "Team ", "", data);



  JFreeChart chart = null;

	
  BarRenderer renderer = null;

  CategoryPlot plot = null;





  final CategoryAxis categoryAxis = new CategoryAxis("Match");

  final ValueAxis valueAxis = new NumberAxis("Run");

  renderer = new BarRenderer();



  plot = new CategoryPlot(dataset, categoryAxis, valueAxis, 

  renderer);

plot.setOrientation(PlotOrientation.VERTICAL); chart = new JFreeChart("Srore Bord", JFreeChart.DEFAULT_TITLE_FONT, plot, true); chart.setBackgroundPaint(new Color(249, 231, 236)); Paint p1 = new GradientPaint( 0.0f, 0.0f, new Color(16, 89, 172), 0.0f, 0.0f, new Color (201, 201, 244));

renderer.setSeriesPaint(1, p1); Paint p2 = new GradientPaint( 0.0f, 0.0f, new Color(255, 35, 35), 0.0f, 0.0f, new Color (255, 180, 180));

renderer.setSeriesPaint(2, p2); plot.setRenderer(renderer); try { final ChartRenderingInfo info = new ChartRenderingInfo (new StandardEntityCollection()); final File file1 = new File("../webapps/jspchart/web/barchart.png"); ChartUtilities.saveChartAsPNG(file1, chart, 600, 400, info); } catch (Exception e) { out.println(e); } %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" > <!meta http-equiv="refresh" content="1"> <title>JSP Page</title> </head> <body> <IMG SRC="barchart.png" WIDTH="600" HEIGHT="400" BORDER="0" USEMAP="#chart"> </body> </html>

Output:

Download code

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