How to use the HTTP4S JDK HTTP Client framework (how to use the http4s jdk HTTP Client Framework in Java Projects)

Use HTTP4S JDK HTTP Client framework in the Java project HTTP4S is a safe and high -performance HTTP service library based on SCALA.Although it is a Scala library, we can use HTTP4S's JDK HTTP Client framework in the Java project to send HTTP requests and processing responses.In this article, we will understand how to use the HTTP4S JDK HTTP Client framework in the Java project and provide some example code to help us understand. Step 1: Add dependencies First of all, we need to add HTTP4S to the JDK HTTP Client framework to our Java project.To this end, we can use the construction tool (such as Maven or Gradle) and add the following dependencies to the construction document of the project. Maven: <dependency> <groupId>org.http4s</groupId> <artifactId>http4s-jdk-http-client_2.12</artifactId> <version>0.23.0-M1</version> </dependency> Gradle: groovy implementation 'org.http4s:http4s-jdk-http-client_2.12:0.23.0-M1' Step 2: Send HTTP request Now, we can start using HTTP4S's JDK HTTP Client framework to send HTTP requests.First, we need to create an object of `Client` and then use it to send a request. import org.http4s.client.jdkhttpclient.*; import java.net.URI; import java.net.http.HttpRequest; import java.net.http.HttpResponse; import java.util.concurrent.CompletableFuture; public class HttpClientExample { public static void main(String[] args) { // Create HTTP4S JDK HTTP Client object JdkHttpClient client = JdkHttpClient.create(); // Create HTTP request HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("https://api.example.com/users")) .build(); // Send HTTP request and obtain response asynchronously CompletableFuture<HttpResponse<String>> response = client.send(request, HttpResponse.BodyHandlers.ofString()); // Treatment response response.thenAccept(res -> { System.out.println("Status Code: " + res.statusCode()); System.out.println("Response Body: " + res.body()); }); // Waiting for asynchronous processing to complete response.join(); // Close HTTP4S's JDK HTTP Client object client.close(); } } In the above sample code, we first created an `jdkhttpclient` object.Then, we built a `httprequest` object that indicates HTTP request and specified URL.Next, we use the `Client.send ()" method to send HTTP requests and obtain response asynchronously.Finally, we handle the response and close the `jdkhttpclient` object.Please note that we use the `CompletableFuture` introduced by Java 11 to handle the asynchronous results. Step 3: Processing HTTP response Once we sends HTTP requests and obtained the response asynchronously, we can use the method provided by the HTTP4S JDK HTTP Client framework to process the response. // ... // Treatment response response.thenAccept(res -> { System.out.println("Status Code: " + res.statusCode()); System.out.println("Response Body: " + res.body()); }); // ... In the above sample code, we use the method of the `TheNACCEPT ()` method to deal with the response.We can obtain the response status code and response body from the `httpresponse` object, and further process it. Summarize In this article, we understand how to use the HTTP4S JDK HTTP Client framework in the Java project to send HTTP requests and processing responses.We first added the dependencies of the JDK HTTP Client framework of HTTP4S, and then created a `jdkhttpClient` object to send a request.Finally, we showed how to deal with HTTP response.I hope this article can help you start using HTTP4S's JDK HTTP Client framework in the Java project.