如何通过apache-httpclient上传文件？

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.13</version>
</dependency>

CloseableHttpClient httpClient = HttpClientBuilder.create().build();

HttpPost httpPost = new HttpPost("http://example.com/upload");

File file = new File("path/to/file");
FileBody fileBody = new FileBody(file);
HttpEntity entity = MultipartEntityBuilder.create().addPart("file", fileBody).build();

httpPost.setEntity(entity);

CloseableHttpResponse response = httpClient.execute(httpPost);

int statusCode = response.getStatusLine().getStatusCode();
String responseBody = EntityUtils.toString(response.getEntity());

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import java.io.File;
import java.io.IOException;

public class FileUploadExample {
    public static void main(String[] args) {
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost httpPost = new HttpPost("http://example.com/upload");

        File file = new File("path/to/file");
        FileBody fileBody = new FileBody(file);
        HttpEntity entity = MultipartEntityBuilder.create().addPart("file", fileBody).build();

        httpPost.setEntity(entity);

        try {
            CloseableHttpResponse response = httpClient.execute(httpPost);
            int statusCode = response.getStatusLine().getStatusCode();
            String responseBody = EntityUtils.toString(response.getEntity());

            System.out.println("Status Code: " + statusCode);
            System.out.println("Response Body: " + responseBody);

            response.close();
            httpClient.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}