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There is some data stored at a end point(url). And the file is a .jsp file.

The following is the data.

{"successful":"true","rows":[{"zip":"56431","user_id":"35","name":"test"}]}

How can I get the data from this end point? www.test/test.jsp

i.e. something like this

var data = get("www.test/test.jsp"); 
var jsonObj = JSON.parse(data);

etc..

Is that possible?

There is some data stored at a end point(url). And the file is a .jsp file.

The following is the data.

{"successful":"true","rows":[{"zip":"56431","user_id":"35","name":"test"}]}

How can I get the data from this end point? www.test./test.jsp

i.e. something like this

var data = get("www.test./test.jsp"); 
var jsonObj = JSON.parse(data);

etc..

Is that possible?

  • java
  • javascript
  • jsp
  • rest
  • get
Share Improve this question edited Apr 9, 2013 at 17:54 Trevor asked Apr 9, 2013 at 15:57 TrevorTrevor 16.1k9 gold badges55 silver badges85 bronze badges 5
  • What is an "end point"? – Pointy Commented Apr 9, 2013 at 15:58
  • Lets just say its a URL to a .jsp file containing the data. – Trevor Commented Apr 9, 2013 at 15:58
  • Is your question how to do this in java or javascript (can't tell based on your tags) – Gordon Tucker Commented Apr 9, 2013 at 16:03
  • Javascript would be preferred. – Trevor Commented Apr 9, 2013 at 16:07
  • 1 possible duplicate of I have a nested data structure / JSON, how can I access a specific value? – Felix Kling Commented Apr 9, 2013 at 16:44
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4 Answers 4

Reset to default 3

I hope this code can help you,

var data = '{"successful":"true","rows":[{"zip":"56431","user_id":"35","name":"test"}]}'
var jsonObj = JSON.parse(data);
var userID = jsonObj.rows[0].user_id;

var name = jsonObj.rows[0].name

jQuery makes this simple:

<html>
<head>
<script src="//ajax.googleapis./ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript">
function callEndpoint() {
    $.getJSON('/endpoint.jsp', function(data) {
        $('#output').append(data.rows[0].user_id);
    });
}
callEndpoint();
</script>
<body>
<div id="output"></div>
</body>
</html>

var obj = JSON.parse(string);//Were string is your data string

See this answer for more details.

I don't know what you mean by end point, but I hope you aren't parsing the data from the URL.

If you are looking for an AJAX solution, you can use this function. It can send variables through the URL and receive a response from the source url.

function get_(url, func)
{
 var http;
 try { http = new XMLHttpRequest(); } catch (e) { try { http = new ActiveXObject(\"Msxml2.XMLHTTP\"); } catch (e) { try { http = new ActiveXObject(\"Microsoft.XMLHTTP\"); } catch (e) { alert(\"Your browser broke!\"); return false; } } }

 http.open(\"GET\", url, true);
 http.onreadystatechange = function() { if(http.readyState == 4) { func(http); } }
 http.send(null);
}

To use this, here is an example of how a button triggers the call and specified a response handler function:

HTML

<button onClick='get_("source_url.jsp", showResponse);'> Show the response </button>

JAVASCRIPT

function showResponse(h) { alert(h.responseText); }

To be clear, the second parameter of the get_ function is a reference to a function. Whatever function you specify when using the get_ function, it passes a single parameter which containes the .responseText property, which is the output from the source_url file.

I use this function all the time, though I have another version that works with my PHP server to authenticate the user so that there is no unauthorized loading/saving of information from/to the server.

本文标签： javaHow to GET data from end point using JavaScriptStack Overflow

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