Java 11의 새로운 HTTP/2 클라이언트를 사용하여 HTTP 요청을 보내고 응답을 처리합니다.

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class HttpClientExample {
    public static void main(String[] args) throws Exception {
        // 创建一个HTTP/2 Client
        HttpClient client = HttpClient.newHttpClient();

        // 创建一个GET请求
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/data"))
                .GET()
                .build();

        // 发送请求并处理响应
        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

        // 打印响应结果
        System.out.println("Response Code: " + response.statusCode());
        System.out.println("Response Body: " + response.body());
    }
}

import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpHeaders;
import java.net.http.HttpResponse.BodyHandlers;

public class HttpClientExample {
    public static void main(String[] args) throws Exception {
        // 创建一个HTTP/2 Client
        HttpClient client = HttpClient.newHttpClient();

        // 创建一个POST请求
        HttpRequest request = HttpRequest.newBuilder()
                .uri(URI.create("https://api.example.com/data"))
                .header("Content-Type", "application/json")
                .POST(HttpRequest.BodyPublishers.ofString("{"key": "value"}"))
                .build();

        // 发送请求并处理响应
        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

        // 打印响应结果
        System.out.println("Response Code: " + response.statusCode());
        System.out.println("Response Body: " + response.body());
    }
}

// 获取响应头
HttpHeaders headers = response.headers();
headers.map().forEach((k, v) -> System.out.println(k + ": " + v));

// 获取响应状态码
int statusCode = response.statusCode();

// 判断响应是否成功
if (statusCode == 200) {
    System.out.println("Request succeeded");
} else {
    System.out.println("Request failed");
}