SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data at line 1 column 92 of the JSON data in javascript

Question

I am new to JavaScript and AJAX. I am getting the below error:

SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data at line 1 column 92 of the JSON data in javascript

I searched a lot in Google, but I can't find a solution. One more thing, if I have one only record in the database, my code works fine; but if I insert another row in the database, I get the error. Please help me to resolve this, find my code below:

 $.ajax({
   type: "POST",
   //dataType: "json",
   url: "./QuizServlet",

   success: function (responseText) {
     alert("alert" + responseText);

     var jsonData = JSON.parse(responseText);
     for (var i = 0; i < jsonData.length; i++) {
       var questions;     
       choice = jsonData[i].options;    
       ch = choice.split(","); 
       console.log(ch);
      questions = [{ question: questionnn, choices: ch, correctAnswer: answer }];
     }
   }
 });

Again, the issue is coming while fetching more than one row from database.

i have added the servlet code from where is returing json output.

List<QuizDto> quiz=new ArrayList<QuizDto>();
    quiz=QuizDao.quizdetails();
    JSONArray jsonarray= new JSONArray();
    for(int i=0;i<quiz.size();i++)
    {
        JSONObject obj = new JSONObject();
        //obj.put("issueno", quiz.get(i).getIssueno());
        obj.put("questions",quiz.get(i).getQuestions());
        obj.put("answers",quiz.get(i).getAnswers());
        obj.put("options", quiz.get(i).getOptions());
        jsonarray.put(obj);
        System.out.println("Json in Servelt"+ jsonarray.toString());
        response.getWriter().print(jsonarray);
    }

i am prininting output in sysout, it is returning only 2 uniques records correctly.

Json in Servelt[{"answers":1,"questions":"what is correct answer","options":"first,second,third,fourth,"},{"answers":2,"questions":"what is quiz","options":"quiz,output,answer,question"}]

but, while in javascript, ResponseText is displaying the 1 row repeated two times as shown below:

alert[{"answers":1,"questions":"what is correct answer","options":"first,second,third,fourth,"}][{"answers":1,"questions":"what is correct answer","options":"first,second,third,fourth,"},{"answers":2,"questions":"what is quiz","options":"quiz,output,answer,question"}]

not able to understand why it is happening

The issue is not in your JavaScript code, but in your server code. Please add the relevant code creating the JSON output, add the JSON itself, and tag your question with the server programming language. — trincot
– trincot, Commented Sep 9, 2017 at 22:54

Kessem Lee · Accepted Answer · 2017-09-10 10:19:24Z

3

The response you're returning is probably not in JSON format. The most common issue is not adding quotes in object keys.

According to the data you're sending, you're actually sending several concatenated JSONs (several arrays not encapsulated and not separated with commas).

this should be [[...],[...],[...]] instead of [...][...][...] as you have now.

edited Sep 10, 2017 at 10:19

answered Sep 9, 2017 at 20:58

Kessem Lee

1,37310 silver badges14 bronze badges

Sign up to request clarification or add additional context in comments.

8 Comments

Namita Over a year ago

I am getting below response alert[{"answers":1,"questions":"what is correct answer","options":"first, second,third,fourth"}][{"answers":1,"questions":"what is correct answer","options":"first, second,third,fourth"},{"answers":2,"questions":"nnm nm","options":"har,har,jj"}]

Namita Over a year ago

one more thing, first row of db is coming twice.

Namita Over a year ago

as you mentioned, The most common issue is not add quotes in objects..without this also, i am getting same error

Namita Over a year ago

the major issue, code is working fine if database having only 1 row. if database having more rows, i am getting the mentioned error

Namita Over a year ago

please help me on this

|

Collectives™ on Stack Overflow

SyntaxError: JSON.parse: unexpected non-whitespace character after JSON data at line 1 column 92 of the JSON data in javascript

1 Answer 1

8 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

8 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related