How can I upload pdf files in Egnyte using Rest API and Java

import java.io.File;import java.io.FileInputStream;import java.io.IOException;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpPost;import org.apache.http.entity.mime.HttpMultipartMode;import org.apache.http.entity.mime.MultipartEntityBuilder;import org.apache.http.entity.mime.content.FileBody;import org.apache.http.impl.client.HttpClientBuilder;import org.apache.http.util.EntityUtils;import org.testng.Assert;@SuppressWarnings("deprecation")public class Postrequest {    public static void postRequest(String attachmentValue) throws Exception {        String attachment = "C:\\Users\\eclipse-workspace\\renamedfile\\"+attachmentValue;        String url = "https://domain.egnyte.com/pubapi/v1/fs-content/Shared/a/Sa/Upload/"+attachmentValue;        File inFile = new File(attachment);        FileInputStream fis = null;        FileBody data = new FileBody(inFile);        try {            fis = new FileInputStream(inFile);            HttpClient httpclient = HttpClientBuilder.create().build();            // server back-end URL            HttpPost httppost = new HttpPost(url);            httppost.addHeader("Authorization", "Bearer " + "*****");            httppost.addHeader("Content-Disposition", "form-data; name=\"file\"");            //httppost.addHeader("Content-type", "****");            httppost.addHeader("Content-type", "text/plain");            httppost.addHeader("Host", "domain.egnyte.com");            MultipartEntityBuilder entity = MultipartEntityBuilder.create();            entity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);            entity.addPart("document", data);            HttpEntity httpEntity = entity.build();            httppost.setEntity(httpEntity);            // execute the request            HttpResponse response = httpclient.execute(httppost);            int statusCode = response.getStatusLine().getStatusCode();            Assert.assertEquals(statusCode, 200,"The Status code is not matched");            HttpEntity responseEntity = response.getEntity();            String responseString = EntityUtils.toString(responseEntity, "UTF-8");            System.out.println("[" + statusCode + "] " + responseString);        } catch (ClientProtocolException e) {            System.err.println("Unable to make connection");        } catch (IOException e) {            System.err.println("Unable to read file");        } finally {            try {                if (fis != null)                    fis.close();            } catch (IOException e) {            }        }    };