RestBuilder插件。如何上传文件而不创建文件？

// 导入相关库
import okhttp3.*;
import java.io.File;
import java.io.IOException;

// 创建RestBuilder对象
RestBuilder restBuilder = new RestBuilder();

// 创建一个File对象，用于上传
File file = new File("path/to/file");

// 创建请求体
RequestBody requestBody = new MultipartBody.Builder()
        .setType(MultipartBody.FORM)
        .addFormDataPart("file", file.getName(), RequestBody.create(MediaType.parse("application/octet-stream"), file))
        .build();

// 创建请求
Request request = new Request.Builder()
        .url("https://api.example.com/upload")
        .header("Content-Disposition", "inline")
        .post(requestBody)
        .build();

// 发送请求并获取响应
try (Response response = restBuilder.getClient().newCall(request).execute()) {
    // 处理响应
    if (response.isSuccessful()) {
        System.out.println("文件上传成功！");
    } else {
        System.out.println("文件上传失败：" + response.code() + " " + response.message());
    }
} catch (IOException e) {
    e.printStackTrace();
}