Use request.getattribute("key"))

Question

I am passing a List list and want to recover in jsp through request.getattribute("key"):

@Override
protected doGet(HTTPServlet request, HTTPServletResponse response)
   throw new ServletException {

  List<Hotel> hotel=Hotel.listar();
  request.setAttribute("key", hoteis);

  RequestDispatcher rd=request.getRequestDispatcher("./hotel/exibe_hoteis.jsp");
  rd.forward(request, response);
}

In jsp I do:

Answer 1

Good Afternoon André Nascimento,

To retrieve the list in the attribute request.getAttribute(); there are two ways.

• Using scriptlets
• Using the JSTL framework

Using Scriptlets

Your code will look something like this:

<% List hoteis = (List) request.getAttribute("key"); %>

At this point you will already have access to the hotels through the variable hoteis. Then simply iterate all hotels within a for and display them to the user.

<table>
   <thead>
      <th>Nome do hotel</th>
      <th>Preço da estadia</th>
   </thead>
   <tbody>
      <% for(int i = 0; i < hoteis.size(); i++) {%>
       <tr>
        <td><%= hoteis.get(i).getNomeHotel() %></td>
        <td><%= hoteis.get(i).getPrecoEstadia() %></td>
       </tr>
       <%}%>
   </tbody>
</table>

I’m assuming your hotel class has the attributes: nomeHotel and early stadia, so include in the code, but you can use your own attributes.

Using the JSTL framework

To spin a loop for within the JSTL you use the tag <c:forEach></c:forEach>

Your code will look something like this:

<table>
   <thead>
      <th>Nome do hotel</th>
      <th>Preço da estadia</th>
   </thead>
   <tbody>
      <c:forEach items="${requestScope.hoteis}" var="hotel">
       <tr>
        <td>
          ${hotel.nomeHotel}
        </td>
        <td>
         ${hotel.precoEstadia}
        </td>
       </tr>
      </c:forEach>
   </tbody>
</table>

There, that way you can display all the items normally.

I hope I’ve helped.