java http发送xml报文加上账号密码认证

要在Java中使用HTTP发送XML报文并加上账号密码认证，可以使用Java的HttpURLConnection类。下面是一个示例代码：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

public class HttpXmlRequestExample {

    public static void main(String[] args) {
        try {
            // 设置请求URL
            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HTTP基本认证
            String username = "yourUsername";
            String password = "yourPassword";
            String auth = username + ":" + password;
            String encodedAuth = Base64.getEncoder().encodeToString(auth.getBytes(StandardCharsets.UTF_8));
            String authHeader = "Basic " + encodedAuth;
            connection.setRequestProperty("Authorization", authHeader);

            // 设置请求的Content-Type为application/xml
            connection.setRequestProperty("Content-Type", "application/xml");

            // 启用输出流，以便发送XML数据
            connection.setDoOutput(true);

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

            // 将XML报文写入输出流
            try (OutputStream outputStream = connection.getOutputStream()) {
                byte[] input = xmlData.getBytes(StandardCharsets.UTF_8);
                outputStream.write(input, 0, input.length);
            }

            // 获取响应结果
            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
                    String line;
                    StringBuilder response = new StringBuilder();
                    while ((line = reader.readLine()) != null) {
                        response.append(line);
                    }
                    System.out.println(response.toString());
                }
            } else {
                System.out.println("HTTP request failed with response code: " + responseCode);
            }

            // 关闭连接
            connection.disconnect();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}