Java sends post request using multipart/form-data format file data to interface code example

import .slf4j.Slf4j;
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import .X509Certificate;
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/**
  * <p>
  *
  * @author Master of Flower Rat
  * @version :1.0
  * @date 2024/4/12 15:10
  */
@Slf4j
public class SendFileUtils {

    /**
      * Use multipart/form-data to transfer files
      * Method of sending files
      * @param url interface address
      * @param file
      */
    public static String sendMultipartFile(String url, File file) {
        //Get HttpClient        CloseableHttpClient client = getHttpClient();
        HttpPost httpPost = new HttpPost(url);
        fillMethod(httpPost,());

        // Request parameter configuration        RequestConfig requestConfig = ().setSocketTimeout(60000).setConnectTimeout(60000)
                .setConnectionRequestTimeout(10000).build();
        (requestConfig);
        String res = "";
        String fileName = ();//file name        try {

            MultipartEntityBuilder builder = ();
            (("UTF-8"));
            (HttpMultipartMode.BROWSER_COMPATIBLE);

            /**
              * Suppose there are two parameters that need to be transmitted
              * Parameter name:filaName value "file name"
              * Parameter name: file value: file (This parameter value is a file object)
              */
            //Normal parameters in the form            ("filaName ",new StringBody("source", ("text/plain", Consts.UTF_8)));
            
            // File parameters in the form Note that the first parameter must be written with the parameter name            ("file", file, ("multipart/form-data",Consts.UTF_8), fileName);

            HttpEntity entity = ();
            (entity);
            HttpResponse response = (httpPost);// Perform a submission
            if (().getStatusCode() == HttpStatus.SC_OK) {
                // Return the response result                res = ((), ("UTF-8"));
            }else {
                res = "Response failed";
                ("The response failed!");
            }
            return res;

        } catch (Exception e) {
            ();
            ("Called HttpPost failed!" + ());
        } finally {
            if (client != null) {
                try {
                    ();
                } catch (IOException e) {
                    ("Close HttpPost connection failed!");
                }
            }
        }
        ("Data transmission was successful!!!!!!!!!!!!!!!!!!!!!!!!");
        return res;
    }
    /**
      * Get HttpClient
      * @return
      */
    private static CloseableHttpClient getHttpClient(){
        SSLContext sslContext = null;
        try {
            sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
           
                public boolean isTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
                    return true;
                }
            }).build();
        } catch (Exception e) {
            ();
            throw new RuntimeException(e);
        }
        SSLConnectionSocketFactory sslConnectionSocketFactory = new SSLConnectionSocketFactory(sslContext,
                );
        CloseableHttpClient client = ().setSSLSocketFactory(sslConnectionSocketFactory).build();
        return client;
    }

    /**
      * Add header file information
      * @param requestBase
      * @param timestamp
      */
    private static void fillMethod(HttpRequestBase requestBase, long timestamp){
        // Here is an example, which header information needs to be added to add it yourself
        //Set timestamp, nginx, underscores_in_headers on; put it in http configuration, otherwise nginx will ignore the header information containing "_"        ("timestamp",(timestamp));
        (());
    }
}

<!-- /artifact//httpclient -->
<dependency>
    <groupId></groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.13</version>
</dependency>