How to attach multiple files to an email using JavaMail

How to attach multiple files to an email using JavaMail?

Sending files to an emill in the folder all files

package com.javanotes2all.java.mail;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class SendFilesInDirectory 
{
public static void main(String[] args) 
{
 SendFilesInDirectory send=new SendFilesInDirectory();
 send.sendAttachments();
}
public void sendAttachments()
{
   try
    {
                String host = "smtp.gmail.com";
  BufferedReader breader=new BufferedReader(new InputStreamReader(System.in));
  System.out.println("enter from email");
  String username=breader.readLine().trim();
  System.out.println("enter password");
  String password=breader.readLine().trim();
  System.out.println("enter to email");
  String to=breader.readLine().trim();
  System.out.println("enter attach file path");
  String filename=breader.readLine().trim();
  Properties props = System.getProperties();
  props.put("mail.smtp.starttls.enable", "true");
  props.put("mail.smtp.host", host);
  props.put("mail.smtp.user", username);
  props.put("mail.smtp.password", password);
  props.put("mail.smtp.port", 587);
  props.put("mail.smtp.auth", "true");
Session session = Session.getInstance(props,  new GMailAuthenticator(username, password));

  Message msg=new MimeMessage(session);
  msg.setSubject("File Attached");
  msg.setFrom(new InternetAddress(username));
 msg.addRecipient(Message.RecipientType.TO,new InternetAddress(to));
  BodyPart msgBP=new MimeBodyPart();
  msgBP.setText("Take a look at this\n");
  Multipart mPart=new MimeMultipart();
  mPart.addBodyPart(msgBP);
  addAttachments(mPart,filename,0);
  msg.setContent(mPart);
  Transport.send(msg);
  System.out.println("mail sent");
 }catch(Exception e)
 {
  System.out.println(e);
 }

}
public void addAttachments(Multipart mPart,String filepath,long size)
{
 try
 {
  File dir=new File(filepath);
  if(dir.isDirectory())
  {
   for (File file : dir.listFiles()) 
   {
    if (file.isFile()) 
     {
      BodyPart msgBP=new MimeBodyPart();
      DataSource src=new FileDataSource(file.getPath());
      msgBP.setDataHandler(new DataHandler(src));
      msgBP.setFileName(file.getName());
      mPart.addBodyPart(msgBP);
      size += file.length();
      }
        else
    addAttachments(mPart,file.getName(),size);
   }
  }else if(dir.isFile())
  {
   size += dir.length();
  }

  double sizeInMB =(double)size / 1024 / 1024;
  String s="MB";
  if(sizeInMB<1)

  {
   sizeInMB=(double)size / 1024;
   s="KB";
  }
  System.out.println("file size"+sizeInMB+" "+s);

 }catch(Exception e)
 {
  System.out.println(e.getMessage());
 }
}
class GMailAuthenticator extends Authenticator
{
 String user;
 String pw;
 public GMailAuthenticator (String username, String password)
 {
  super();
  this.user = username;
  this.pw = password;
 }
 public PasswordAuthentication getPasswordAuthentication()
 {
  return new PasswordAuthentication(user, pw);
 }
}
}