Pag. 2/5. </html> File BMIServlet.java /* * BMIServlet.java */ package it.mauriziocozzetto.servlet;

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Brendan Griffith
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2 Pag. 2/5 File index.html  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>calcolo del BMI</title> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <style> #modulo { width:300px; margin-left:auto; margin-right:auto; </style> <body> <div id="modulo"> <form name="frminput" action="bmiservlet"> <fieldset> <legend>inserisci i tuoi dati</legend> <p>peso <input type="text" name="txtpeso" value="80" /></p> <p>altezza <input type="text" name="txtaltezza" value="1.75" /></p> <p><input type="submit" value="invia" name="btninvia" /></p> </fieldset> </form> </div> </body> </html> File BMIServlet.java /* * BMIServlet.java package it.mauriziocozzetto.servlet; import it.mauriziocozzetto.classes.bmi; import java.io.ioexception; import java.io.printwriter; import java.util.logging.level; import java.util.logging.logger; import javax.servlet.servletexception; import javax.servlet.http.httpservlet; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; * maurizio public class BMIServlet extends HttpServlet { * Processes requests for both HTTP <code>get</code> and <code>post</code> methods.

3 Pag. 3/5 protected void processrequest(httpservletrequest request, HttpServletResponse response) response.setcontenttype("text/html;charset=utf-8"); PrintWriter out = response.getwriter(); out.println("<html>"); out.println("<head>"); out.println("<title>servlet BMIServlet</title>"); out.println("</head>"); out.println("<body>"); out.println("<h1>servlet BMIServlet at " + request.getcontextpath () + "</h1>"); if (request.getparameter("btninvia")!=null) { int peso=0; double altezza =0.0; peso = Integer.parseInt(request.getParameter("txtPeso")); altezza = Double.parseDouble(request.getParameter("txtAltezza")); catch(numberformatexception ex) { out.println("verificare la correttezza dei dati inseriti. Servono due valori numerici. "+ex.getmessage()); return; BMI b=null; b = new BMI(peso, altezza); out.println("indice di massa corporea: "+b.trovabmi()+", responso: "+b.tostring()); catch (Exception ex) { // out.println("e' impossibile calcolare il BMI. "+ex.getmessage()); else { out.println("occorre inserire peso e altezza."); out.println("</body>"); out.println("</html>"); finally { out.close(); // <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.

4 Pag. 4/5 // protected void doget(httpservletrequest request, HttpServletResponse response) processrequest(request, response); catch (Exception ex) { Logger.getLogger(BMIServlet.class.getName()).log(Level.SEVERE, null, ex); * Handles the HTTP <code>post</code> method. protected void dopost(httpservletrequest request, HttpServletResponse response) processrequest(request, response); catch (Exception ex) { Logger.getLogger(BMIServlet.class.getName()).log(Level.SEVERE, null, ex); * Returns a short description of the servlet. a String containing servlet description public String getservletinfo() { return "Short description"; // </editor-fold> File BMI.java /* * BMI.java package it.mauriziocozzetto.classes; * maurizio public class BMI { int peso; double altezza; public BMI(int peso, double altezza) throws Exception { if (peso>0 && altezza>0.0) { this.peso = peso; this.altezza = altezza;

5 Pag. 5/5 else throw new Exception("Dati non validi"); public double trovabmi() { return peso/(altezza*altezza); public String tostring() { if (trovabmi()<16.00) return "Grave magrezza"; if (trovabmi()>=16.00 && trovabmi()<=18.49) return "Sottopeso"; if (trovabmi()>=18.50 && trovabmi()<=24.99) return "Regolare"; if (trovabmi()>=25.0 && trovabmi()<=29.99) return "Sovrappeso"; if (trovabmi()>=30.0 && trovabmi()<=34.99) return "Obeso classe I"; if (trovabmi()>=35.0 && trovabmi()<=39.99) return "Obeso classe II"; if (trovabmi()>=40.0) return "Obeso classe III"; return "Non applicabile"; // fine classe BMI

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