URLConnection : Get specific header field

URLConnection class provides getHeaderField method, by using this you can get the value of specific header field.

public String getHeaderField(String name)
Returns the value of the named header field, or null if there is no such field in the header.

import java.net.URL;
import java.net.URLConnection;

public class Main {

  public static void main(String args[]) throws Exception {
    String resource = "https://self-learning-java-tutorial.blogspot.com";

    /* Construct URL object */
    URL url = new URL(resource);

    /* Open URLConnection to this URL */
    URLConnection conn = url.openConnection();

    String contentType = conn.getHeaderField("Content-Type");
    String tranferEncoding = conn.getHeaderField("Transfer-Encoding");
    String lastModified = conn.getHeaderField("Last-Modified");

    System.out.println("contentType : " + contentType);
    System.out.println("tranferEncoding : " + tranferEncoding);
    System.out.println("lastModified : " + lastModified);
  }
}

Sample Output

contentType : text/html; charset=UTF-8

tranferEncoding : chunked
lastModified : Mon, 18 May 2015 10:26:27 GMT

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