<dependency>

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

            <artifactId>httpclient</artifactId>

            <version>4.5.3</version>

        </dependency>

package com.skd.util;

import com.skd.common.Constant;

import com.skd.common.Event;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.methods.PostMethod;

import org.apache.commons.httpclient.methods.multipart.FilePart;

import org.apache.commons.httpclient.methods.multipart.MultipartRequestEntity;

import org.apache.commons.httpclient.methods.multipart.Part;

import org.apache.commons.httpclient.methods.multipart.StringPart;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import java.io.File;

import java.util.ArrayList;

import java.util.List;

/**

 * @Description

 * @Author virgosnail

 * @Date 2018/12/15 17:06

 */

public class HttpUtil2

{

    private static Logger log = LoggerFactory.getLogger(HttpUtil2.class);

    /**

     * org.apache.commons.httpclient.HttpClient

      */

    private static HttpClient httpClient = new HttpClient();

    /**

     * @param event  0:删除  1：新增  2：修改

     * @param file

     * @return

     * @Author Administrator

     * @Date 2018年11月11日

     */

    public static void doPostMethod(Event event, File file)

    {

        try

        {
PostMethod post = new PostMethod(FileUtil.getURL());

            post.setRequestHeader("Content-Type","application/json");

            List<Part> list = new ArrayList<>();

            list.add(new StringPart(Constant.TYPE, event.getValue()));

            list.add(new StringPart(Constant.RELATIVE_PATH, file.getPath()));

            if (!Event.FILE_DELETE.equals(event))

            {
　　　　　　　　　　//

                list.add(new FilePart(Constant.FILE, file));

            }

            Part[] parts = new Part[list.size()];

            list.toArray();

            post.setRequestEntity(new MultipartRequestEntity(parts, post.getParams()));

            log.info("request： " + post);

            httpClient.executeMethod(post);

            String response = post.getResponseBodyAsString();

            log.info("respopnse: " + response);

        } catch (Exception e)

        {

            log.error("doPostMethod occur a exception", e);

        }

    }

}

        <dependency>

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

            <artifactId>httpmime</artifactId>

            <version>4.5.3</version>

        </dependency>

package com.skd.util;

import com.skd.common.Constant;

import com.skd.common.Event;

import net.sf.json.JSONObject;

import org.apache.http.Header;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.client.HttpClient;

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

import org.apache.http.entity.ContentType;

import org.apache.http.entity.StringEntity;

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

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

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

import org.apache.http.util.EntityUtils;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import java.io.File;

import java.nio.charset.Charset;

/**

 * @Description

 * @Author virgosnail

 * @Date 2018/12/15 17:06

 */

public class HttpUtil

{

    private static Logger log = LoggerFactory.getLogger(HttpUtil.class);

    /**

     *     org.apache.http.client.HttpClient;

     *     创建一个httpclient对象

      */

    private static HttpClient httpclient = HttpClients.createDefault();

    /**

     * @param event  0:删除  1：新增  2：修改

     * @param file

     * @return

     * @Author Administrator

     * @Date 2018年11月11日

     */

    public static void doPost(Event event, File file, boolean isDir, boolean hasFile)

    {

        try

        {

            // 创建http的发送方式对象，是GET还是POST

            String url = FileUtil.getURL();

            HttpPost httppost = new HttpPost(url);

            log.info(" URL: " + url);

            httppost.addHeader("Charset",Constant.CHARSET);

            // 创建要发送的实体，就是key-value的这种结构，借助于这个类，可以实现文件和参数同时上传

            MultipartEntityBuilder fileEntity = MultipartEntityBuilder.create();

            // 设置编码

            Charset charset = Charset.forName(Constant.CHARSET);

            fileEntity.setCharset(charset);

            // 追加要发送的文本信息并设置编码格式

            fileEntity.addTextBody(Constant.TYPE, event.getValue(),ContentType.APPLICATION_JSON);

            log.info("type： " + event.getValue());

            String relativePath = FileUtil.getRelativePath(file.getAbsolutePath());

            fileEntity.addTextBody(Constant.RELATIVE_PATH, relativePath,ContentType.APPLICATION_JSON);

            log.info("relative_path： " + relativePath);

            fileEntity.addTextBody(Constant.ISDIR, String.valueOf(isDir),ContentType.APPLICATION_JSON);

            log.info("isDir： " + isDir);

            if (Event.FILE_CREATE.equals(event) || Event.FILE_CHANGE.equals(event)){

                fileEntity.addPart(Constant.FILE, new FileBody(file,ContentType.APPLICATION_OCTET_STREAM));

            }

            log.info("file： " + file);

            HttpEntity httpEntity = fileEntity.build();

            httppost.setEntity(httpEntity);

            // 执行httppost对象并获得response

            HttpResponse response = httpclient.execute(httppost);

            // 状态码

            int statusCode = response.getStatusLine().getStatusCode();

            HttpEntity resEntity = response.getEntity();

            // 获得返回来的信息，转化为字符串string

            String respopnse = EntityUtils.toString(resEntity);

            log.info("respopnse body: " + respopnse);

        } catch (Exception e)

        {

            log.error("doPost occur a exception", e);

        }

    }

}