Java android multipart/form-data发送请求

// 导入所需的类
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

// 创建一个方法来发送multipart/form-data请求
public void sendMultipartRequest(String url, String filePath) throws IOException {
    // 创建URL对象
    URL requestUrl = new URL(url);
    
    // 创建HttpURLConnection对象
    HttpURLConnection connection = (HttpURLConnection) requestUrl.openConnection();
    connection.setDoOutput(true);
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW");
    
    // 创建请求体
    File file = new File(filePath);
    String boundary = "----WebKitFormBoundary7MA4YWxkTrZu0gW";
    String CRLF = "\r\n";
    OutputStream outputStream = connection.getOutputStream();
    
    // 写入文件数据
    outputStream.write(("--" + boundary + CRLF).getBytes());
    outputStream.write(("Content-Disposition: form-data; name=\"file\"; filename=\"" + file.getName() + "\"" + CRLF).getBytes());
    outputStream.write(("Content-Type: " + HttpURLConnection.guessContentTypeFromName(file.getName()) + CRLF).getBytes());
    outputStream.write(CRLF.getBytes());
    // 读取文件内容并写入请求体
    // ...
    
    // 写入文本数据
    outputStream.write(("--" + boundary + CRLF).getBytes());
    outputStream.write(("Content-Disposition: form-data; name=\"text\"" + CRLF).getBytes());
    outputStream.write(CRLF.getBytes());
    outputStream.write("Hello, World!".getBytes());
    outputStream.write(CRLF.getBytes());
    
    // 结束请求体
    outputStream.write(("--" + boundary + "--" + CRLF).getBytes());
    outputStream.flush();
    outputStream.close();
    
    // 发送请求并获取响应
    int responseCode = connection.getResponseCode();
    // 处理响应
    // ...
}