java 原生api MultipartFile 进行post传输

Java原生API中，可以使用MultipartFile类来进行文件的post传输。不过在Java原生服务器中，可以使用其他方式来实现文件的post传输，而不用依赖于MultipartFile类。可以参考下面的代码示例来实现：

import java.io.File;
import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class FileUploadExample {
    public static void main(String[] args) {
        File file = new File("path/to/file"); // 上传文件的路径
        String url = "http://example.com/upload"; // 上传文件的URL

        OkHttpClient client = new OkHttpClient();

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

        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                System.out.println("Upload failed: " + e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                System.out.println("Upload successful!");
            }
        });
    }
}

这个示例代码使用了OkHttp库来进行文件的post传输。你可以通过创建一个MultipartBody对象，并使用addFormDataPart方法添加文件参数，然后通过OkHttpClient发送请求来实现文件的上传。你需要将文件的路径和上传的URL替换成你自己的路径和URL。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [Java原生服务器接收上传文件 不使用MultipartFile类](https://download.csdn.net/download/weixin_38640674/12746362)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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