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java_dzienna_15_09
Commit 6023d5a7 by Patryk Czarnik
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Kalkulator2

parent 34b8f50a
Showing with 75 additions and 0 deletions
PC25-Serwlety/src/main/java/kalkulator/Kalkulator2.java 0 → 100644
package kalkulator;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/Kalkulator2")
public class Kalkulator2 extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE html>");
out.println("<html>");
out.println("<head>");
out.println("<title>Kalkulator serwletowy</title>");
out.println("<link rel='stylesheet' type='text/css' href='styl.css'>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Kalkulator 2</h1>");
out.println("<p>Wpisz liczby i wybierz działanie:</p>");
out.println("<form>");
out.println("<input name='liczba1' type='number'>");
out.println("<select name='operacja'>");
out.println("<option value='+'>+</option>");
out.println("<option value='-'>-</option>");
out.println("<option value='*'>*</option>");
out.println("<option value='/'>/</option>");
out.println("</select>");
out.println("<input name='liczba2' type='number'>");
out.println("<button>=</button>");
out.println("</form>");
String param1 = request.getParameter("liczba1");
String param2 = request.getParameter("liczba2");
String operacja = request.getParameter("operacja");
if(param1 != null && param2 != null && operacja != null) {
try {
long liczba1 = Long.parseLong(param1);
long liczba2 = Long.parseLong(param2);
long wynik;
switch(operacja) {
case "+": wynik = liczba1 + liczba2;
break;
case "-": wynik = liczba1 - liczba2;
break;
case "*": wynik = liczba1 * liczba2;
break;
case "/": wynik = liczba1 / liczba2;
break;
default:
throw new IllegalArgumentException("Nieznane działanie: " + operacja);
}
out.println("<div class='wynik'>Suma: " + wynik + "</div>");
} catch (NumberFormatException e) {
out.println("<div class='error'>Niepoprawny format liczby</div>");
} catch(Exception e) {
out.println("<div class='error'>Błąd: " + e.getMessage() + "</div>");
}
}
out.println("</body>");
out.println("</html>");
}
}
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