How do I get a string from my servlet and use it in my ajax function

Question

I have a servlet that contains a string, wherein the latter is a JSON string with multiple entries. Now I want to access this String with ajax through jQuery. Now here if my function:

function myFunction() {
    $("#myButton").click(function() {
         $.ajax({ 
             url: // servlet,
             type: "GET",
             dataType : "text",
             success: function() // I want to display the string from the servlet,
             error:  // stuff


    // other code

Anyway how can I do this. Also can I place another function in the success part rather than an anonymous function?

gurvinder372 · Answer 1 · 2016-01-04T10:07:54.280

0

I want to display the string from the servlet,

your success method has a parameter data

success: function(data){ alert( data ); }

Also can I place another function in the success part rather than an anonymous function?

success: namedFunction, 

function namedFunction(data){ alert(data); }

edited Jan 04 '16 at 10:07

answered Jan 04 '16 at 10:05

gurvinder372

66,980
10
72
94

`namedFunction(data)` will be called/executed when that line of code will be parsed. Function expression need to be passed I guess. `data` will be first argument of the callback function hence no need to pass `data` just in case you are about to write `namedFunction(data)` inside anonymous function.. – Rayon Jan 04 '16 at 10:06

Rayon · Answer 2 · 2016-01-04T10:13:13.057

You can pass function expression to be executed on success or error. First argument for success callback is response sent via server.

Try this:

function successGoesHere(response) {
  console.log(response);
}

function errorGoesHere(err) {
  console.log(err);
}

function myFunction() {
  $("#myButton").click(function() {
    $.ajax({
      url: "YOUR_URL",
      type: "GET",
      dataType: "text",
      success: successGoesHere,
      error: errorGoesHere
    })
  })
}

As you are passing dataType : "text" in ajax config, response will always be plain text, just in case you are expecting it to be json, your response will be string representation of json hence you will have to parse it using JSON.parse(response) to get JSON object

score 0 · Answer 3 · answered Jan 04 '16 at 10:05

0

Is this what you're looking for?

function getString(url, handleResponse, handleFailure) {
    var request = new XMLHttpRequest();
    request.open("GET", url, true);
    request.onload = function () {
        if (request.status >= 200 && request.status < 400) {
            if (handleResponse) {
                handleResponse(request.responseText);
            }
        } else {
            if (handleFailure) {
                handleFailure(request.status);
            }
        }
    };
}

this just gets a string from URL (No JQuery)

answered Jan 04 '16 at 10:05

guysigner

2,822
1
19
23

jQuery is tagged in the question. Any reason to use Vanilla JS ajax syntax over jQuery ? – Rayon Jan 04 '16 at 10:09
No good reason in particular, just an alternative solution. – guysigner Jan 04 '16 at 10:11

score 0 · Answer 4 · edited May 23 '17 at 12:15

0

Use ajax request success : function(resp){ code for parsing json and show parsed json // var json = $.parseJSON(data); }

You need to look this

edited May 23 '17 at 12:15

Community

1
1

answered Jan 04 '16 at 10:14

Rahul Bhawar

450
7
17

score 0 · Answer 5 · answered Jan 04 '16 at 10:21

var callback = function(data, textStatus, xhr)
{
    alert(data + "\t" + textStatus);
}

var testman = function(str, cb) {
    var data = 'Input values';
    $.ajax({
        type: 'post',
        url: '',// servlet
        data: data,
    success: cb
    });
}
testman('Hello, Dear', callback);

How do I get a string from my servlet and use it in my ajax function

5 Answers5