Sending an HTTPS request from a Java application

What are the ways to send https requests from a desktop java application? The source code example is particularly interesting.

Author: Nicolas Chabanovsky, 2011-02-15
Source

3 answers

The most primitive way is to use URLConnection. Here is an example without error handling, encodings, and other husks:

public static void main(String[] args) throws Exception {
    URLConnection connection = new URL("https://www.dev.java.net/servlets/ProjectList").openConnection();

    InputStream is = connection.getInputStream();
    InputStreamReader reader = new InputStreamReader(is);
    char[] buffer = new char[256];
    int rc;

    StringBuilder sb = new StringBuilder();

    while ((rc = reader.read(buffer)) != -1)
        sb.append(buffer, 0, rc);

    reader.close();

    System.out.println(sb);
}

If it turns out that the standard URLConnection (more precisely, it is actually created HttpsUrlConnection) if something doesn't work, then use the Apache HTTP Client.

 12
Author: cy6erGn0m, 2017-11-18 22:17:07 
import java.net.*;
import java.io.*;

public class URLReader {
    public static void main(String[] args) throws Exception {

        URL oracle = new URL("http://www.oracle.com/");
        BufferedReader in = new BufferedReader(
        new InputStreamReader(oracle.openStream()));

        String inputLine;
        StringBuilder sb = new StringBuilder();
        while ((inputLine = in.readLine()) != null)
            sb.append(inputLine);
        in.close();
        System.out.println(sb); 
    }
}

Source https://docs.oracle.com/javase/tutorial/networking/urls/readingURL.html

 1
Author: FORTRAN, 2016-10-12 17:10:15

You can use the http-request built on the apache http api. 

String uri = "https://www.dev.java.net/servlets/ProjectList";
HttpRequest<String> httpRequest = HttpRequestBuilder.createGet(uri, String.class)
.responseDeserializer(ResponseDeserializer.ignorableDeserializer()).build();

public void send(){
  ResponseHandler<String> response = httpRequest.execute(someParamsYouWant);
  System.out.println(response.getStatusCode());
  System.out.println(response.get()); //retuns response body
}
 1
Author: Beno Arakelyan, 2017-09-17 12:33:29