import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
//extends HttpServlet always included in Servlet
public class ExampServlet extends HttpServlet {
//doPost method processes request and response
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
//response will be in text/html
response.setContentType("text/html");
//set up a print writer for the response
PrintWriter out = response.getWriter();
//write the html to the print writer
out.println("Example" +
"");
out.println("Your Mortgage Calculation
");
//get String Parameters from the form
String DATA = request.getParameter("DATA");
//Note: all strings must be converted to numeric if
//needed for calculations.
//process the form parameters, additional business objects
//can be added here
//add code here to check for numeric and display message
//if input error
double amount = Double.parseDouble(request.getParameter("amount"));
double rate = Double.parseDouble(request.getParameter("rate"));
int years = Integer.parseInt(request.getParameter("years"));
double monthlyInterest = rate/12/100;
int months = years * 12;
//Use FinancialCalculations methods
double payment = FinancialCalculations.calculateMonthlyPayment(
amount, months, monthlyInterest);
String Payment = String.valueOf(payment);
double futureValue =
FinancialCalculations.calculateFutureValue
(payment, months, monthlyInterest);
String fv = String.valueOf(futureValue);
//Add code here to convert to currency
//**
if(Payment != null){
out.println("Payment: "+ Payment);
out.println("Future Value: "+ fv);
} else {
out.println("Nothing entered.");
}
//http address point to page to return to
out.println("To visit a web CourseClick Here
");
out.println("Or use your browsers back button to return to form
");
out.close();
}
}