Hola a todos, espero que puedan ayudarme.
Tengo un archivo index.jsp que recoge unos datos (un numero y un múltiplo)
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page contentType="text/html" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Bonus</title>
</head>
<body>
<h1>Bonus</h1>
<form method="get" action="/WebApplication4/NewServlet">
<table>
<tr>
<th>Numero</th>
<th>Multiplo</th>
</tr>
<c:forEach var="i" begin="0" end="2" step="1">
<tr>
<td><input type="text" value="" name="numero"/></td>
<td><input type="text" value="" name="multiplo"/></td>
</tr>
</c:forEach>
</table>
<button type="submit">Enviar</button>
<button type="reset">Reiniciar</button>
</form>
</body>
</html>
A continuación, paso estos números a un Servlet (NewServlet.java)
package servlet;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
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(name = "NewServlet", urlPatterns = {"/NewServlet"})
public class NewServlet extends HttpServlet {
public double getBonus(String multiplo) {
return Double.parseDouble(multiplo) * 100.0;
}
/**
* 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 request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
int k = 0;
Enumeration Data = request.getParameterNames();
Map<String, String[]> Element = new HashMap<String, String[]>();
ArrayList<String> myList = new ArrayList();
while (Data.hasMoreElements()) {
String Param = (String)Data.nextElement();
String[] ValeursParam = request.getParameterValues(Param);
myList.add(Param);
Element.put(Param, request.getParameterValues(Param));
k++;
}
List<HashMap<String, String>> List = new ArrayList<HashMap<String, String>>();
int i = 0;
for(i=0; i<Element.get(myList.get(0)).length; i++) {
HashMap<String, String> ElementS = new HashMap<String, String>();
for(int j=0; j<k; j++) {
ElementS.put(myList.get(j), Element.get(myList.get(j))[i].toString());
}
List.add(ElementS);
}
Beans servlet = new Beans();
servlet.setListBeans(List);
request.setAttribute("Beans", servlet);
request.getRequestDispatcher("bonus.jsp").forward(request, response);
}
// <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>
}
Los datos del array los paso a un Beans
package servlet;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class Beans {
private List<HashMap<String, String>> ListBeans;
public List<HashMap<String, String>> getListBeans() {
return this.ListBeans;
}
public void setListBeans(List<HashMap<String, String>> ListBeans) {
this.ListBeans = ListBeans;
}
}
Y finalmente otro archivo .jsp los muestra
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@page contentType="text/html" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Bonus</title>
</head>
<body>
<h1>Bonus</h1>
<c:forEach items="${Beans.listBeans}" var="ElementS" varStatus="status">
<div class="ElementS">
<div class="numeroElementS">
Numero: <c:out value="${ !empty ElementS['numero'] ? ElementS['numero'] : 'Vacio' }" />
</div>
<div class="bonusElementS">
Bonus: <c:out value="${ !empty ElementS['bonus'] ? ElementS['bonus'] : 'Vacio' }" />
</div>
</div>
</c:forEach>
</body>
</html>
Pues bien, quiero que en el archivo Servlet, los valores "múltiplo" sean editados (necesito multiplicarlos por otro valor) y sea este resultado (llamado bonus) y no el "múltiplo", lo que muestre el archivo bonus.jsp
Espero que hayan entendido el problema.
Gracias por su ayuda.