com.swcguild.springmvcwebapp.controller.InterCalcController.java Source code

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Here is the source code for com.swcguild.springmvcwebapp.controller.InterCalcController.java

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package com.swcguild.springmvcwebapp.controller;

import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

/**
 *
 * @author apprentice
 */
@Controller
public class InterCalcController {

    private double originalBalance;
    private double startingBalance;
    private double intRate;
    private double numYears;
    private double numPeriods;
    private String message;
    private double totalInterest;
    private double newBalance;

    @RequestMapping(value = "/intercalc", method = RequestMethod.GET)
    public String doGet() {
        return "intercalc";
    }

    @RequestMapping(value = "/intercalc", method = RequestMethod.POST)
    public String doPost(HttpServletRequest request, Model model) {

        try {
            originalBalance = Double.parseDouble(request.getParameter("myAnswer"));
            startingBalance = originalBalance;
            intRate = Double.parseDouble(request.getParameter("myRate"));
            numYears = Double.parseDouble(request.getParameter("myYears"));
            numPeriods = Double.parseDouble(request.getParameter("myPeriods"));
            message = "";
            //totalInterest;
            //newBalance;
            //List<Map> annualInterest = new ArrayList<>();
            Map yearMap = new HashMap<>();
            DecimalFormat df = new DecimalFormat("#.00");

            int yearCount = 0;

            do {
                newBalance = originalBalance * (Math.pow(1 + ((intRate * .01) / numPeriods), (numPeriods)));
                yearCount++;

                double interestPerYear = newBalance - originalBalance;

                String interestPerYearString = df.format(interestPerYear);

                yearMap.put(yearCount, interestPerYearString);

                originalBalance = newBalance;

            } while (yearCount <= (numYears - 1));
            totalInterest = newBalance - startingBalance;
            //annualInterest.add(yearMap);
            String annualInterestString = yearMap.toString().replace("{", "").replace("}", "").trim();

            model.addAttribute("originalBalance", df.format(startingBalance));
            model.addAttribute("newBalance", df.format(newBalance));
            model.addAttribute("interestRate", intRate);
            model.addAttribute("interestEarned", df.format(totalInterest));
            model.addAttribute("years", df.format(numYears));
            model.addAttribute("periods", df.format(numPeriods));
            model.addAttribute("annualInterest", yearMap);

        } catch (NumberFormatException e) {
        }

        return "intercalcResponse";
        //<td><c:out value="${current.id}" /><td>
    }

}