HttpClient Sınıfı - Java 11 İle Geliyor - HttpClient API

Giriş
Şu satırı dahil ederiz.

import java.net.http.HttpClient;

1. HttpRequest nesnesi yaratılır. Bu nesne GET, POST gibi bir isteği temsil ederi

2. HttpClient nesnesi yaratılır. Bu nesnenin send() veya sendAsync() metodu çağrılır. 

3. Çağrı sonucunda HttpResponse nesnesi elde edilir. 

4. HttpResponse sınıfı şöyle kullanılır

Örnek - String HttpResponse
Şöyle yaparız. 

HttpClient client = HttpClient.newHttpClient();

HttpRequest request = ...;

HttpResponse<String> responseOfString = client.send(request,
  HttpResponse.BodyHandlers.ofString());


System.out.println("Status code: " + responseOfString.statusCode());
System.out.println("Body: " + responseOfString.body());

Örnek - Stream HttpResponse

Şöyle yaparız

HttpResponse<InputStream> getResponse(HttpRequest request) 
  throws IOException, InterruptedException {
  return HttpClient
    .newHttpClient()
    .send(request, HttpResponse.BodyHandlers.ofInputStream());
}

HttpResponse<InputStream> response = getResponse(request);

System.out.println("status code: " + response.statusCode());
InputStream body = response.body();

newBuilder metodu

HttpClient.Builder Sınıfı yazısına taşıdım

newHttpClient metodu

Şöyle yaparız

HttpClient client = HttpClient.newHttpClient();

send metodu

send metodu yazısına taşıdım

sendAsync metodu

sendAsync metodu yazısına taşıdım

Java 21

Açıklaması şöyle

The java.net.http.HttpClient now implements AutoClosable, making it usable in a try-with-resources block.

There are also 5 new related methods:

İmzası şöyle

// Initiates an orderly shutdown by completing previously submitted
// request but not accepting new ones.
void close()

// Initiates a graceful shutdown and returns immediately
void shutdown()

// Initiates an immediate shutdown and tries to interrupt any active
// operation. Returns immediately, too.
void shutdownNow()

// Waits for the client to terminate for the given duration.
// Returns true if the client was terminated in time.
boolean awaitTermination(Duration duration)

// Checks if a client is terminated.
boolean isTerminated()

Açıklaması şöyle

Instances obtained via HttpClient.newHttpClient() or HttpClient.newBuilder() provide best-effort implementations of these methods.