JFreeChart In Servlet

• JFreeChart api is for generating Different Charts.

• chart type supported by this library line charts, scatter plots, time series charts, high-low-open-close charts, candlestick plots, Gantt charts, etc.

• Download Link:-

             jfree chart download link

Project Structure:-

Test JFreeChart:-

package com.sandeep.jfreechart.servlet;

import java.awt.image.RenderedImage;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.category.DefaultCategoryDataset;

/**
 * Servlet implementation class JFreeChartServlet
 */
public class JFreeChartServlet extends HttpServlet {
 private static final long serialVersionUID = 1L;

 /**
  * @see HttpServlet#HttpServlet()
  */
 public JFreeChartServlet() {
  super();
  // TODO Auto-generated constructor stub
 }

 /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
  *      response)
  */
 protected void doGet(HttpServletRequest request,
   HttpServletResponse response) throws ServletException, IOException {

  response.setContentType("image/png");

  ServletOutputStream os = response.getOutputStream();

  DefaultCategoryDataset dataset = new DefaultCategoryDataset();
  dataset.addValue(76, "Java", "Sandeep");
  dataset.addValue(30, "Java", "Sangeeta");
  dataset.addValue(50, "Java", "Surabhi");
  dataset.addValue(20, "Java", "Sumanta");
  dataset.addValue(10, "Oracle", "Sandeep");
  dataset.addValue(90, "Oracle", "Sangeeta");
  dataset.addValue(23, "Oracle", "Surabhi");
  dataset.addValue(87, "Oracle", "Sumanta");

  JFreeChart chart = ChartFactory.createAreaChart("Area Chart", "",
    "Value", dataset, PlotOrientation.VERTICAL, true, true, false);

  RenderedImage chartImage = chart.createBufferedImage(300, 300);
  ImageIO.write(chartImage, "png", os);
  os.flush();
  os.close();
 }

 /**
  * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
  *      response)
  */
 protected void doPost(HttpServletRequest request,
   HttpServletResponse response) throws ServletException, IOException {

 }

}

Code Download:-

download the test code

Video:-