Bagaimanakah pengaturcaraan rangkaian Java melaksanakan komunikasi berasaskan HTTP?

URL url = new URL("https://example.com");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();

// 設置請求方法 (GET或POST)
conn.setRequestMethod("GET");
// 设置请求头
conn.setRequestProperty("Content-Type", "application/json");

// 发送请求
conn.connect();
// 获取响应状态码
int responseCode = conn.getResponseCode();
// 获取响应主体（如果响应是成功代码）
if (responseCode == HttpURLConnection.HTTP_OK) {
    InputStream in = conn.getInputStream();
    // 处理响应主体
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpGetExample {
    public static void main(String[] args) throws IOException {
        // 创建 URL
        URL url = new URL("https://www.example.com");

        // 打开连接
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();

        // 发送 GET 请求
        connection.setRequestMethod("GET");
        connection.connect();

        // 获取响应状态码
        int responseCode = connection.getResponseCode();

        // 打印响应状态码
        System.out.println("响应状态码：" + responseCode);

        // 如果响应码是 200，则读取响应体
        if (responseCode == HttpURLConnection.HTTP_OK) {
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
            reader.close();
        }

        // 关闭连接
        connection.disconnect();
    }
}