使用AsyncHttpClient的rest文件上传客户端的示例代码

import com.ning.http.client.AsyncHttpClient;
import com.ning.http.client.AsyncHttpClientConfig;
import com.ning.http.client.Response;
import com.ning.http.client.multipart.FilePart;
import com.ning.http.client.multipart.StringPart;

import java.io.File;
import java.util.concurrent.Future;

public class FileUploadClient {

    public static void main(String[] args) {
        AsyncHttpClientConfig config = new AsyncHttpClientConfig.Builder().build();
        AsyncHttpClient asyncHttpClient = new AsyncHttpClient(config);

        try {
            File file = new File("path/to/file"); // 上传的文件路径

            String url = "http://example.com/upload"; // 上传文件的目标URL

            FilePart filePart = new FilePart("file", file); // 创建文件Part
            StringPart stringPart = new StringPart("description", "File upload"); // 创建描述Part

            Future<Response> future = asyncHttpClient.preparePost(url)
                    .addBodyPart(filePart)
                    .addBodyPart(stringPart)
                    .execute();

            Response response = future.get(); // 获取上传结果

            System.out.println("Response status code: " + response.getStatusCode());
            System.out.println("Response body: " + response.getResponseBody());

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            asyncHttpClient.close();
        }
    }
}