[FIXED] Redirect a JSP request to itself after executing in a Servlet

Issue

I am trying to return a JSP request back to the calling Page with the help of a Java servlet class. This means that after adding a comment on a JSP page, the comment reappears on the JSP page as well after sending the request object to the servlet. This is the calling JSP code:

 <form action="/WebAppOpe/UploadComments" method="post">
                        <textarea name="comment" placeholder="Comment" column="10"></textarea>
                        <input type="submit" value="Post Comment" class="btn-login" name="btn_post" />
                        <input type ="hidden" name="carIdComment" value="${car.carId}" />
 </form>

And this is the servlet code of the UploadComments URI for sending the request back to the source.

        RequestDispatcher rd = request.getRequestDispatcher("model.jsp?" + request.getParameter("carIdComment"));
        rd.forward(request, response);
        response.sendRedirect("model.jsp?"+  request.getParameter("carIdComment"));

Solution

Since you just want to refresh the current page,ajax is a better choice for you.

For you current design,both forward and redirect are okay,but something need to pay attention:

1. if you use redirect,you can set parameters via the url

2. after forward or redirect,you need to query the exits comments,which means that you had can either redirect to a new url and query data, or query the data before forward.

Answered By - lucumt
Answer Checked By - Katrina (JavaFixing Volunteer)