Java tutorial
import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.logging.Level; 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.PlotOrientation; import org.jfree.data.category.DefaultCategoryDataset; /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ /** * * @author rishabh */ public class recomm extends HttpServlet { /** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> * methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); try { /* TODO output your page here. You may use following sample code. */ final String fiat = "FIAT"; final String audi = "AUDI"; final String ford = "FORD"; final String speed = "Speed"; final String millage = "Millage"; final String userrating = "User Rating"; final String safety = "safety"; final DefaultCategoryDataset dataset = new DefaultCategoryDataset(); dataset.addValue(1.0, fiat, speed); dataset.addValue(3.0, fiat, userrating); dataset.addValue(5.0, fiat, millage); dataset.addValue(5.0, fiat, safety); dataset.addValue(1.0, audi, speed); dataset.addValue(1.0, audi, userrating); dataset.addValue(1.0, audi, millage); dataset.addValue(1.0, audi, safety); dataset.addValue(4.0, ford, speed); dataset.addValue(2.0, ford, userrating); dataset.addValue(3.0, ford, millage); dataset.addValue(6.0, ford, safety); JFreeChart barChart = ChartFactory.createBarChart("CAR USAGE STATISTICS", "Category", "Score", dataset, PlotOrientation.VERTICAL, true, true, false); int width = 640; /* Width of the image */ int height = 480; /* Height of the image */ File BarChart = new File("/home/rishabh/###amit/JavaApplication3BarChart.jpeg"); ChartUtilities.saveChartAsJPEG(BarChart, barChart, width, height); out.println("<!DOCTYPE html>"); out.println("<html>"); out.println("<head>"); out.println("<title>Servlet recomm</title>"); out.println("</head>"); out.println("<body>"); out.println("<h1>Servlet recomm at " + request.getContextPath() + "</h1>"); out.println("</body>"); out.println("</html>"); } catch (Exception e) { e.printStackTrace(); } } // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code."> /** * Handles the HTTP <code>GET</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Handles the HTTP <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }