CODEWITHSUNDEEP
javajspservletsjstlhref
TheNorth
TheNorth

Reputation: 57

Passing parameter from JSTL to servlet through <a href> and jstl tags

So this is the code i'm using to send the parameter "idemp" that contains the value ${masession.idemp}

<a href="<c:url value="/consultertickets">
                <c:param name="idemp" value="${masession.idemp}"/>
         </c:url>">
<img src="<c:url value="/inc/liste.png"></c:url>" alt="consulter tickets" />
</a>

when redirected to the servlet "/consultertickets" the browser URL shows:

http://localhost:4040/monprojet2/consultertickets?idemp=64

so the parameter is passed and working but the method used to obviously GET and not POST, which is the method i'm using in the servlet, here's the servlet's code.

@WebServlet(urlPatterns= {"/consultertickets"})

public class ConsulterTickets extends HttpServlet {

private String VUE = "/WEB-INF/ListeTickets.jsp";

@EJB
private TicketDao ticketDao;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    this.getServletContext().getRequestDispatcher(VUE).forward(request, response);
}


protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    CreationTicketForm ticketform = new CreationTicketForm(ticketDao);
    List<Ticket> lticket = ticketform.recupererTickets(request);

    boolean resultat;
    if(lticket.isEmpty())
    {
        //resultat="Vous n'avez soumit aucun ticket";
        resultat = false;
        request.setAttribute("resultat", resultat);
        this.getServletContext().getRequestDispatcher("/ListeTickets2.jsp").forward(request, response);
    }else{
        //String VUE = "/ListeTickets.jsp";
        resultat=true;
        request.setAttribute("resultat", resultat);
        request.setAttribute("lticket", lticket);
        this.getServletContext().getRequestDispatcher(VUE).forward(request, response);
    }
}

}

is there any way to pass a parameter to a servlet through POST method, without going through the <form></form>

Upvotes: 0

Views: 1652

Answers (1)

Ravi MCA
Ravi MCA

Reputation: 2621

Solution 1:

Modifying doGet method

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    //this.getServletContext().getRequestDispatcher(VUE).forward(request, response);
    doPost(request, response);
}

Solution 2:

Remove the doGet() and change doPost() to service()

Edit1:

See, Hyperlinks(<a> tag) are meant to send GET request but not POST.

So, if you want to achieve sending POST request using Hyperlink there is no straight way. But, Javascript can be your help.

Using Javascript you can guide <a> to send POST request along with the help of <form>.

I just modified your code little bit. This should help you.

<a href="javascript:document.getElementById('form1').submit()">
    <img src="<c:url value="/inc/liste.png"></c:url>" alt="consulter tickets" />
</a>

<form action="<c:url value="/consultertickets"/>" method="post" id="form1">
    <input type="hidden" name="idemp" value="${masession.idemp}"/>
</form>

Upvotes: 1

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