<dependency>

              <groupId>org.apache.httpcomponents</groupId>

              <artifactId>httpmime</artifactId>

<!--               <version>4.5.3</version> -->

        </dependency>

import java.io.File;

import java.io.IOException;

import org.apache.http.HttpEntity;

import org.apache.http.client.methods.CloseableHttpResponse;

import org.apache.http.client.methods.HttpPost;

import org.apache.http.entity.ContentType;

import org.apache.http.entity.mime.MultipartEntityBuilder;

import org.apache.http.entity.mime.content.FileBody;

import org.apache.http.entity.mime.content.StringBody;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClientBuilder;

import org.apache.http.util.EntityUtils;

public class TestMultiPartUpload {

    /**

     * TODO 方法说明。

     *

     * @param args

     * @throws IOException

     */

    public static void main(String[] args) throws IOException {

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

        try {

        HttpPost post = new HttpPost("http://127.0.0.1:8080/mypath/test");

        post.setHeader("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;)");

        post.setHeader("charset", "utf-8");

        String token = "4dc6098e-d584-4883-a4e7-45adc5xxxxxx";

        post.setHeader("Authorization", "Bearer " + token);

        post.setHeader("Accept", "application/json");

        // post.setHeader("Content-Type", "multipart/mixed;boundary=----QWERTYUIO");

        FileBody img1 = new FileBody(new File("D:/img/1.jpg"), ContentType.create("image/jpeg"), "1.jpg");

        FileBody img2 = new FileBody(new File("D:/img/4.jpg"), ContentType.create("image/jpeg"), "4.jpg");

        StringBody meta = new StringBody("{ \"key1\":\"v1\"; \"key2\":\"v2\"   }", ContentType.APPLICATION_JSON);

        HttpEntity reqEntity = MultipartEntityBuilder.create()

                .addPart("files", img1)

                .addPart("files", img2)

                //.addPart("story", meta).setBoundary("----QWERTYUIO")
                .addPart("story", meta)

                .build();

        post.setEntity(reqEntity);

        CloseableHttpResponse response = httpClient.execute(post);

        try {

            System.out.println("----------------------------------------");

            System.out.println(response.getStatusLine());

            HttpEntity resEntity = response.getEntity();

            if (resEntity != null) {

                System.out.println("Response content: " + InputStreamUtil.toString(resEntity.getContent()));

                System.out.println("Response content length: " + resEntity.getContentLength());

            }

            EntityUtils.consume(resEntity);

        } finally {

            response.close();

        }

        } finally {

            httpClient.close();

        }

    }

}