Java 11:新的HTTP客户端使用x-www-form-urlencoded参数发送POST请求

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URLEncoder;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpHeaders;

public class HttpClientExample {
    public static void main(String[] args) {
        try {
            // 构建参数字符串
            String formData = "param1=" + URLEncoder.encode("value1", "UTF-8") +
                    "&param2=" + URLEncoder.encode("value2", "UTF-8");

            // 创建HttpClient实例
            HttpClient client = HttpClient.newHttpClient();

            // 创建HttpRequest对象
            HttpRequest request = HttpRequest.newBuilder()
                    .uri(URI.create("http://example.com/api/endpoint"))
                    .header("Content-Type", "application/x-www-form-urlencoded")
                    .POST(HttpRequest.BodyPublishers.ofString(formData))
                    .build();

            // 发送请求并获取响应
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());

            // 处理响应
            int statusCode = response.statusCode();
            String responseBody = response.body();
            HttpHeaders headers = response.headers();

            // 输出结果
            System.out.println("Status code: " + statusCode);
            System.out.println("Response body: " + responseBody);
            System.out.println("Headers: " + headers);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}