Untuk membuat Aplikasi Servlet Untuk Menambahkan Dan Mengalikan Dua Bilangan Yang Diinputkan , ada 2 tahap :
1 ) Langkah pertama ,,,,
Membuat satu file html sebagai form inputan angka yang akan dimasukkan, kemudian beri nama newhtml.html
lalu ketikkan kode dibawah ini!
<!--
To change this template, choose Tools | Templates
and open the template in the editor.
-->
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<h1>Kalkulator Servlet Untuk Menjumlahkan Atau Mengalikan Dua buah bilangan</h1>
<form method="GET" action="NewServlet1">
<input type="text" name="valOne" value="0">
<input type="text" name="valTwo" value="0">
<input type="submit" value="ADD">
</br> </br>
</form>
<form method="POST" action="NewServlet1">
<input type="text" name="valOne" value="0">
<input type="text" name="valTwo" value="0">
<input type="submit" value="MULTIPLY">
</form>
</body>
</html>
2 ) Langkah Kedua ,,,,
Membuat file servlet , kemudian beri nama NewServlet1.java
lalu ketikkan kode dibawah ini!
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
*
* @author Goldfriet
*/
public class NewServlet1 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, String str)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
String txt = "";
try {
if (str != null) {
txt = str;
}
/* TODO output your page here. You may use following sample code. */
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet FirstServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet FirstServlet at " + request.getContextPath() + "</h1>");
out.println("<p>");
out.println("<h2>");
out.println("Hello :).... ");
out.println("<p>");
out.println("Hasilnya Adalah " + txt);
out.println("</h2>");
out.println("<form method=\"GET\" action=\"FirstServlet\">");
} 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.
*
* @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 {
int rslt;
String result = null;
String paramOne = null;
String paramTwo = null;
paramOne = request.getParameter("valOne");
paramTwo = request.getParameter("valTwo");
rslt = Integer.parseInt(paramOne) + Integer.parseInt(paramTwo);
result = String.valueOf(rslt);
processRequest(request, response, result);
}
/**
* 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 {
int rslt;
String result = null;
String paramOne = null;
String paramTwo = null;
paramOne = request.getParameter("valOne");
paramTwo = request.getParameter("valTwo");
rslt = Integer.parseInt(paramOne) * Integer.parseInt(paramTwo);
result = String.valueOf(rslt);
processRequest(request, response, result);
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
Setelah itu simpan, kemudian silahkan dijalankan newhtml.html , jika berhasih hasilnya akan seperti dibawah ini...
