How to use java.net.URLConnection to fire and handle HTTP requests?

When working with HTTP it's almost always more useful to refer to HttpURLConnection rather than the base class URLConnection (since URLConnection is an abstract class when you ask for URLConnection.openConnection() on a HTTP URL that's what you'll get back anyway).

Then you can instead of relying on URLConnection#setDoOutput(true) to implicitly set the request method to POST instead do httpURLConnection.setRequestMethod("POST") which some might find more natural (and which also allows you to specify other request methods such as PUT, DELETE, ...).

It also provides useful HTTP constants so you can do:

int responseCode = httpURLConnection.getResponseCode();



if (responseCode == HttpURLConnection.HTTP_OK) {

4 years ago

There are 2 options you can go with HTTP URL Hits : GET / POST

GET Request :-

HttpURLConnection.setFollowRedirects(true); // defaults to true



String url = "https://name_of_the_url";;

URL request_url = new URL(url);

HttpURLConnection http_conn = (HttpURLConnection)request_url.openConnection();

http_conn.setConnectTimeout(100000);

http_conn.setReadTimeout(100000);

http_conn.setInstanceFollowRedirects(true);

System.out.println(String.valueOf(http_conn.getResponseCode()));

POST request :-

HttpURLConnection.setFollowRedirects(true); // defaults to true



String url = "https://name_of_the_url";

URL request_url = new URL(url);

HttpURLConnection http_conn = (HttpURLConnection)request_url.openConnection();

http_conn.setConnectTimeout(100000);

http_conn.setReadTimeout(100000);

http_conn.setInstanceFollowRedirects(true);

http_conn.setDoOutput(true);

PrintWriter out = new PrintWriter(http_conn.getOutputStream());

if (urlparameter != null) {

   out.println(urlparameter);

}

out.close();

out = null;

System.out.println(String.valueOf(http_conn.getResponseCode()));

4 years ago

if you are using http get please remove this line

urlConnection.setDoOutput(true);

4 years ago