一，原始方式

使用JAVA.NET包中的HttpURLConnection類。以下是一個簡單的示例代碼，用于發送GET請求并獲取響應：

javaCopy code
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class HttpGetRequestExample {
    public static void mAIn(String[] args) {
        try {
            // 創建URL對象
            URL url = new URL("http://example.com");

            // 打開連接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 設置請求方法
            connection.setRequestMethod("GET");

            // 獲取響應代碼
            int responseCode = connection.getResponseCode();
            System.out.println("Response Code: " + responseCode);

            // 讀取響應內容
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.Append(line);
            }
            reader.close();

            // 打印響應內容
            System.out.println("Response: " + response.toString());

            // 斷開連接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

上述示例代碼用于發送GET請求，您可以更改請求方法和URL以適應您的實際需求。請注意，HTTP請求是不安全的，建議在實際使用中使用HTTPS來確保數據的安全傳輸。

二，使用Apache HttpClient庫

使用Apache HttpClient庫。請確保您的項目中包含了相關的依賴

示例代碼：

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import java.io.BufferedReader;
import java.io.InputStreamReader;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

public class HttpsPostRequestExample {
    public static void main(String[] args) {
        try {
            // 創建HttpClient對象
            HttpClient httpClient = HttpClients.createDefault();

            // 創建HttpPost對象，并設置URL
            HttpPost httpPost = new HttpPost("https://example.com");

            // 設置請求頭
            httpPost.setHeader("Content-Type", "application/json");

            // 設置請求體
            String requestBody = "{"key1":"value1","key2":"value2"}";
            StringEntity requestEntity = new StringEntity(requestBody);
            httpPost.setEntity(requestEntity);

            // 發送POST請求
            HttpResponse response = httpClient.execute(httpPost);

            // 獲取響應代碼
            int responseCode = response.getStatusLine().getStatusCode();
            System.out.println("Response Code: " + responseCode);

            // 讀取響應內容
            BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
            StringBuilder responseContent = new StringBuilder();
            String line;
            while ((line = reader.readLine()) != null) {
                responseContent.append(line);
            }
            reader.close();

            // 打印響應內容
            System.out.println("Response: " + responseContent.toString());

            // 斷開連接
            httpClient.getConnectionManager().shutdown();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

上述示例代碼中，我們使用了Apache HttpClient庫來發送HTTPS的POST請求。您可以根據實際需求修改請求的URL、請求頭、請求體等部分。請確保您的項目中包含了Apache HttpClient庫的依賴。