CODEWITHSUNDEEP
javajsonjspservlets
palAlaa
palAlaa

Reputation: 9858

JSP: Error in forwarding page

This question is related to the previous one, when I click over an anchor 

<a href="#" id="Email">send email</a>

it calls servlet using json

   $("#Email").click(function() {

    var option={
        "action":"sendEmail"
    };
    $.getJSON('StudentManagementServlet',option, function(hasEmail) {
        if(hasEmail == false){
            // //view form to let user enter his email
            $("#CommViaEmail").fadeIn("normal");   
        }
    });
});

in servlet I handle the request

 if (action != null && action.equals("sendEmail")) {

    //open connection to db
    con.setAutoCommit(false);
    String email = ParentManagement.getParentEmail(con, stdNo);
    if (email != null) {
        String commResult = createAccountAndSendEmail(con, parentNo, email);
        request.setAttribute("result", commResult);
        request.setAttribute("incp", "ResultPage");
         RequestDispatcher dispatcher = request.getRequestDispatcher("/index.jsp");
        dispatcher.forward(request, response);  //doesn't make forward!!!!!
        System.out.println(">>send email DONE!!");
        con.commit();
        return;
    } else {
        boolean hasEmail = false;
        String json = new Gson().toJson(hasEmail);
        response.setContentType("application/json");
        response.setCharacterEncoding("UTF-8");
        response.getWriter().write(json);

    }
}

The problem here is if user has an email, then I send an email but request dosn't forward to result page, even the print statement is printed " System.out.println(">>send email DONE!!");" ??

Upvotes: 0

Views: 386

Answers (2)

Aravindan R
Aravindan R

Reputation: 3084

You are making an AJAX request from the client and are trying to 'forward' that request in the server side.

AJAX requests DONT refresh the page. The hasEmail variable in javascript function will be a string containing the HTML of the index.jsp.

Upvotes: 0

BalusC
BalusC

Reputation: 1108802

You need to let JS/jQuery do that job. Let the servlet write true as JSON result and in JS do

if (hasEmail) {
    window.location = 'index.jsp';
} else {
    $("#CommViaEmail").fadeIn("normal");   //view form to let user enter his email
}

Or when you want to control the URL yourself, add the new location to the JSON

Map<String, Object> data = new HashMap<String, Object>();
data.put("hasEmail", true);
data.put("location", "index.jsp");
// ...

with

..., function(data) {
    if (data.hasEmail) {
        window.location = data.location;
    } else {
        $("#CommViaEmail").fadeIn("normal");   //view form to let user enter his email
    }
}

Upvotes: 1

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