URLConnection HTTP HEADER PARSE 자바 샘플 코드

        URLConnection conn = obj.openConnection();
	Map<String, List<String>> map = conn.getHeaderFields();

	System.out.println("Printing Response Header...\n");

	for (Map.Entry<String, List<String>> entry : map.entrySet()) {
		System.out.println("Key : " + entry.getKey() 
                           + " ,Value : " + entry.getValue());
	}