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java_weekendowa_20221008
Commit 4909af53 by Patryk Czarnik
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POST jako doGet

parent 9f1048a1
Showing with 74 additions and 0 deletions
PC23-Serwlety/src/main/java/kalkulator/Kalkulator2.java
......@@ -15,6 +15,7 @@ import org.apache.commons.lang3.StringUtils;
public class Kalkulator2 extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
......
PC23-Serwlety/src/main/java/kalkulator/Kalkulator3.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;
import org.apache.commons.lang3.StringUtils;
@WebServlet("/Kalkulator3")
public class Kalkulator3 extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
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><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</h1>");
out.println("<form method='post'>");
out.println("<input type='number' name='liczba1'>");
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 type='number' name='liczba2'>");
out.println("<button>Oblicz</button>");
out.println("</form>");
String param1 = request.getParameter("liczba1");
String param2 = request.getParameter("liczba2");
String operacja = request.getParameter("operacja");
if(StringUtils.isNoneBlank(param1, param2, operacja)) {
try {
long liczba1 = Long.parseLong(param1);
long liczba2 = Long.parseLong(param2);
long wynik = switch(operacja) {
case "+" -> liczba1 + liczba2;
case "-" -> liczba1 - liczba2;
case "*" -> liczba1 * liczba2;
case "/" -> liczba1 / liczba2;
default -> throw new IllegalArgumentException("Nieznane działanie: " + operacja);
};
out.printf("<div class='wynik'>%d %s %d = <strong>%d</strong></div>\n",
liczba1, operacja, liczba2, wynik);
} catch (NumberFormatException e) {
out.printf("<div class='error'>Niepoprawny format liczby</div>\n");
} catch(Exception e) {
out.printf("<div class='error'>Błąd: %s</div>\n", e.getMessage());
}
}
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// Aby metoda POST była obsłużona tak samo jak GET, można po prostu z doPost wywołać doGet
doGet(request, response);
}
}
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