CODEWITHSUNDEEP
java
ralfiii
ralfiii

Reputation: 676

How to move from URL to URL in Java (Re-use reader-object?)

Sorry for the very basic question, I am new to Java. To get data from an URL I use code like this

URL url = new URL(BaseURL+"login?name=foo");
URLConnection yc = url.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));
while ((inputLine = in.readLine()) != null)
  ...

That works perfectly fine. When I now want to continue and send the next command to the server (like ".../getStatus"), do I need to create these objects over and over again, or is there a smarter way?

Thanks!

Upvotes: 1

Views: 115

Answers (2)

ralfiii
ralfiii

Reputation: 676

I looked into the Apache HttpComponents (HttpClient) and it still requires a lot of code. As I don't need cookie-handling (it's only a simple RESTful server giving json-blocks as responses) I'm going for a very simple solution:

public static String readStringFromURL(String requestURL) throws IOException
{
   URL u = new URL(requestURL);
   try (InputStream in = u.openStream()) {
       return new String(in.readAllBytes(), StandardCharsets.UTF_8);
   }
}

For me that looks like a perfect solution, but as mentioned, I am new to Java and open (and thankful) for hints...

Upvotes: 0

Lothar
Lothar

Reputation: 5449

You have to call openConnection again in order to get a new URLConnection. The HttpURLConnection does internal caching, though, so if the HTTP-server supports Connection: keep-alive the underlying connection to the server will be reused so it's not that bad as it originally might look. It's just hidden from you.

Upvotes: 2

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