How to send json data in url as request parameters in java

Question

I want to send json data in url as below .

editTest.jsp?details=374889331-{"aNumber":2}

How can I do this?

score 5 · Accepted Answer · answered Oct 24 '14 at 06:18

5

URL encode your details parameter:

String otherParameter = "374889331-";    
String jsonString = "{\"aNumber\":2}";

String url = "editTest.jsp?details=" + URLEncoder.encode(otherParameter + jsonString, "UTF-8");

answered Oct 24 '14 at 06:18

eee

3,241
1
17
34

Does this make sense? It encodes it to pretty strange looking url params: `%7B%22aNumber%22%3A2%7D`. – Alex Moore-Niemi Apr 09 '21 at 16:20
@AlexMoore-Niemi Have a look at this URL encoding reference: https://www.w3schools.com/tags/ref_urlencode.ASP – eee Apr 09 '21 at 20:29
The encoding itself is fine, but it's encoding the brackets and such as well. That doesn't seem exactly equivalent to sending "foo=bar" and I don't think all servers will interpret it to be the same. I guess that's what the poster is asking for though! – Alex Moore-Niemi Apr 11 '21 at 15:48

score 2 · Answer 2 · answered Oct 24 '14 at 05:18

2

you need to convert the JSON object to string

      JSONObject obj = new JSONObject();

      obj.put("name","foo");

      StringWriter out = new StringWriter();
      obj.writeJSONString(out);

      String jsonText = out.toString();//JSON object is converted to string

Now, you can pass this jsonText as parameter.

answered Oct 24 '14 at 05:18

Nishad K Ahamed

1,374
15
25

The issue is the converted string contains ':' which is not works in url . – Sanjaya Liyanage Oct 24 '14 at 05:42
@SanjayaLiyanage you never said it in your question...! – Nishad K Ahamed Oct 24 '14 at 05:47
@SanjayaLiyanage yep I know, but that is not your problem right? – Nishad K Ahamed Oct 24 '14 at 05:53
ok Nishad I'm sorry If the question was not up to the point .Why I am unable to send the json data from the url is because it contains : . – Sanjaya Liyanage Oct 24 '14 at 05:56
Ok, sounds good. Why don't you use request object to pass parameters? Which framework are you using? – Nishad K Ahamed Oct 24 '14 at 06:00
Nishad that thing works fine when I encode the url and send .Thank you for trying to help :) – Sanjaya Liyanage Oct 24 '14 at 06:07

score 1 · Answer 3 · answered Dec 12 '19 at 13:54

We can convert the Object to JSON Object using GSON, then parse the JSON object and convert it to query param string. The Object should only contain primitive objects like int, float, string, enum, etc. Otherwise, you need to add extra logic to handle those cases.

public String getQueryParamsFromObject(String baseUrl, Object obj) {
        JsonElement json = new Gson().toJsonTree(obj);
        // Assumption is that all the parameters will be json primitives and there will
        // be no complex objects.
        return baseUrl + json.getAsJsonObject().entrySet().stream()
                .map(entry -> entry.getKey() + "=" + entry.getValue().getAsString())
                .reduce((e1, e2) -> e1 + "&" + e2)
                .map(res -> "?" + res).orElse("");
    }

score 0 · Answer 4 · answered Oct 24 '14 at 05:10

0

Json2 can help. JSON.stringify(obj)

answered Oct 24 '14 at 05:10

Paris Tao

335
1
3
11

score 0 · Answer 5 · answered Oct 24 '14 at 05:28

0

We can use the help of Gson

String result =new Gson().toJson("your data");

NB: jar file needed for Gson

answered Oct 24 '14 at 05:28

Anptk

1,125
2
17
28

This doesn't urlencode the data though. – msp Aug 25 '23 at 08:47

How to send json data in url as request parameters in java

5 Answers5

Linked