每次出错时都无法在ajax调用中获得成功响应

Question

I am trying to get json data from servlet, from back-end I am getting proper response but every time call is going to error block of ajax call. Here is My JS Code:

$(document).ready(function()

{
    $("#submit").on("click", function()
    {

        userId = $("#userNameTxt").val();
        seqAns = $("#seqAnsTxt").val();
        seqQues = $("#seqQues").val();
        command = $("#_CMD").val()
        alert(command);
        $.ajax({
            type : "POST",
            dataType : "json",
            url : "/Inventory/InvController",
            data : {_CMD : command, uid : userId, ques : seqQues, ans : seqAns},
            success : function(retVal)
            {
                alert("success");
                var test = $.parseJSON(retVal);
                if(true)
                {
                    $("#resetPwd").show();
                }
            },
            error: function(error)
            {
                alert("error");
            }
        });
    });
});

Here is My Servlet Code:

boolean isSuccess = logHelper.performForgotPwdValidation(agentDetails);

PrintWriter out = null;

    JsonObject jsonObj = new JsonObject();
    try 
    {
        jsonObj.addProperty("isValid", isSuccess);

        response.setContentType( "application/json" );

        response.setCharacterEncoding("UTF-8");
        out = response.getWriter();
        out.write(jsonObj.toString());
        out.flush();
    } 
    catch (IOException e) 
    {
        e.printStackTrace();
    }
    finally
    {
        if( null != out )
        {
            out.close();
        }
    }

While running every time it is going to the error function of the ajax call.

please help if I am doing anything wrong. Thanks in advance.

Answer 1

Your data type is JSON, but your data is just a JavaScript object. Use JSON.stringify() around the data so it's valid JSON data. (Change to JSON.stringify({_CMD : command, uid : userId, ques : seqQues, ans : seqAns}) )