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- /*
- * To change this template, choose Tools | Templates
- * and open the template in the editor.
- */
- package com.exchange;
- import java.io.*;
- import java.net.*;
- import java.util.*;
- import javax.servlet.*;
- import javax.servlet.http.*;
- import java.io.InputStream;
- import java.net.*;
- import com.google.gson.*;
- /**
- *
- * @author pakallis
- */
- class Recv
- {
- private String lhs;
- private String rhs;
- private String error;
- private String icc;
- public Recv(
- {
- }
- public String getLhs()
- {
- return lhs;
- }
- public String getRhs()
- {
- return rhs;
- }
- }
- public class Convert 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 req, HttpServletResponse resp)
- throws ServletException, IOException {
- String query = "";
- String amount = "";
- String curTo = "";
- String curFrom = "";
- String submit = "";
- String res = "";
- HttpSession session;
- resp.setContentType("text/html;charset=UTF-8");
- PrintWriter out = resp.getWriter();
- /*Read request parameters*/
- amount = req.getParameter("amount");
- curTo = req.getParameter("to");
- curFrom = req.getParameter("from");
- /*Open a connection to google and read the result*/
- try {
- query = "http://www.google.com/ig/calculator?hl=en&q=" + amount + curFrom + "=?" + curTo;
- URL url = new URL(query);
- InputStreamReader stream = new InputStreamReader(url.openStream());
- BufferedReader in = new BufferedReader(stream);
- String str = "";
- String temp = "";
- while ((temp = in.readLine()) != null) {
- str = str + temp;
- }
- /*Parse the result which is in json format*/
- Gson gson = new Gson();
- Recv st = gson.fromJson(str, Recv.class);
- String rhs = st.getRhs();
- rhs = rhs.replaceAll("�", "");
- /*we do the check in order to print the additional word(millions,billions etc)*/
- StringTokenizer strto = new StringTokenizer(rhs);
- String nextToken;
- out.write(strto.nextToken());
- nextToken = strto.nextToken();
- if( nextToken.equals("million") || nextToken.equals("billion") || nextToken.equals("trillion"))
- {
- out.println(" "+nextToken);
- }
- } catch (NumberFormatException e) {
- out.println("The given amount is not a valid number");
- }
- }
- // <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>
- }
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