import java.io.File;
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.MultipartEntity;
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.HttpClientBuilder;
import org.apache.http.util.EntityUtils;

import sun.misc.BASE64Encoder;

public class AttachFileToIncident {

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

        String pathname = "E:/TestAttachment.xlsx";
        File fileupload = new File(pathname);
        FileBody data = new FileBody(fileupload);
        HttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost postRequest = new HttpPost(
                " URL: /api/now/v1/attachment/filename");
        BASE64Encoder base = new BASE64Encoder();

        String encoding = base.encode("user:password".getBytes());
        postRequest.setHeader("Authorization", "Basic " + encoding);
        postRequest.addHeader("Accept", "application/json");
        postRequest.addHeader("Content-type", "multipart/form-data");
         MultipartEntity reqEntity = new MultipartEntity();

         reqEntity.addPart("file_name", new StringBody( fileupload.getName()));
         reqEntity.addPart("data", data);
         postRequest.setEntity(reqEntity);
         HttpResponse response = httpClient.execute(postRequest);
         System.out.println( response ) ;

         HttpEntity resEntity = response.getEntity();
         System.out.println( resEntity ) ;
          System.out.println( EntityUtils.toString(resEntity) );

          EntityUtils.consume(resEntity);
          httpClient.getConnectionManager().shutdown();
    }



}