java 不适用URL对象http发送xml报文

Java使用URL对象发送HTTP请求是完全可行的，包括发送XML报文。以下是一个使用URL对象发送XML报文的示例代码：

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

public class HttpClient {
    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("http://example.com/api");

            // 创建HttpURLConnection对象
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 设置请求方法为POST
            connection.setRequestMethod("POST");

            // 设置请求头部信息
            connection.setRequestProperty("Content-Type", "application/xml");

            // 启用输出流，用于发送请求数据
            connection.setDoOutput(true);

            // 创建XML报文
            String xmlData = "<xml>...</xml>";

            // 获取输出流并写入XML报文
            OutputStream outputStream = connection.getOutputStream();
            outputStream.write(xmlData.getBytes());
            outputStream.flush();
            outputStream.close();

            // 获取响应码
            int responseCode = connection.getResponseCode();

            // 读取响应数据
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 输出响应结果
            System.out.println("Response Code: " + responseCode);
            System.out.println("Response Data: " + response.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}