Use proxies and their validation (authentication) in JAVA HTTP connections (httpurlconnection) __java

public static void Main (string[] args) {
		//TODO auto-generated method stub
		 try {
	            url url = new URL ("Http://ww W.baidu.com ");
	            Create a proxy server
	            inetsocketaddress addr = new Inetsocketaddress ("172.21.1.8");
	            Proxy proxy = new Proxy (Proxy.Type.HTTP, addr); HTTP proxy
	            URLConnection conn = url.openconnection (proxy);

                    The following three lines are in need of authentication, enter account password information
	            String headerkey = "Proxy-authorization";
	            String headervalue = "Basic" +base64.encodetostring ("Atco:atco". GetBytes (), false);	Account password: Separated, base64 encryption way
	            Conn.setrequestproperty (Headerkey, headervalue);
	            
	            InputStream in = Conn.getinputstream ();
	            InputStream in = Url.openstream ();
	            String s = ioutils.tostring (in, "Utf-8");
	            System.out.println (s);
	        } catch (Exception e) {
	            e.printstacktrace ();
	        }
	}