Java - JSP อยากทราบวิธีส่งอีเมลไปยังผู้รับหลายคนในการส่งครั้งเดียวครับ

package contact;

import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import java.util.Date;
import java.text.SimpleDateFormat;


import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class servletContact
 */
@WebServlet("/servletContact")
public class servletContact extends HttpServlet {
	private static final long serialVersionUID = 1L;
	
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		request.setCharacterEncoding("UTF-8");
		response.setContentType("text/html; charset=UTF-8");
		String fullName = new String(request.getParameter("txtFormName").getBytes("ISO8859_1"),"UTF-8");
		System.out.println(fullName);
		String nameCompany = new String(request.getParameter("txtFormCompany").getBytes("ISO8859_1"),"UTF-8");
		String address = new String(request.getParameter("txtFormAddress").getBytes("ISO8859_1"),"UTF-8");
		String tel = new String(request.getParameter("txtFormTel").getBytes("ISO8859_1"),"UTF-8");
		String fax =  new String(request.getParameter("txtFormFax").getBytes("ISO8859_1"),"UTF-8");
		String email = new String(request.getParameter("txtFormEmail").getBytes("ISO8859_1"),"UTF-8");
		String subject =  new String(request.getParameter("txtFormSubject").getBytes("ISO8859_1"),"UTF-8");
		String message =  new String(request.getParameter("txtFormMessage").getBytes("ISO8859_1"),"UTF-8");
		Date now = new Date();
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		String datetime = df.format(now);
		
//		Sending Email.......................................................................
		
		String host = "smtp.gmail.com";
		String port = "587";
		
		String user = "[email protected]";
		String pass = "xxxxxxxxxxx";
		
		String recipient = "[email protected]";
		String recipientCC = "[email protected]";
		
		String resultMessage = "";
		System.out.println(message);
		try {
            EmailUtility.sendEmail(host, port, user, pass, recipient, recipientCC, subject,
                    message);
            resultMessage = "The e-mail was sent successfully";
        } catch (Exception ex) {
            ex.printStackTrace();
            resultMessage = "There were an error: " + ex.getMessage();
        } finally {
            System.out.println(resultMessage);
        }
				
		//Insert Database
		String sql = "INSERT INTO contact(name, name_company, address, tel, fax, email, subject, message, date_contact) " +
				"values ( '"+fullName+"', '"+nameCompany+"', '"+address+"', '"+tel+"', '"+fax+"', '"+email+"', '"+subject+"', '"+message+"', '"+datetime+"')";
		
		Connection con = null;
		PreparedStatement pst = null;
		
		try{
			con = DBConnect.getConnection();
			pst = con.prepareStatement(sql);
			pst.executeUpdate();
		}
		catch(SQLException e) {
			throw new ServletException(e);
		} 
		finally {
			if (pst != null) {
				try {
					pst.close();
				} catch (SQLException ignore) {
				}
			}
			if (con != null) {
				try {
					con.close();
				} catch (SQLException ignore) {
				}
			}
		}
		
	}
}

package contact;


import java.util.Date;
import java.util.Properties;
 
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
 
/**
 * A utility class for sending e-mail messages
 * @author www.codejava.net
 *
 */
public class EmailUtility {
    public static void sendEmail(String host, String port,
            final String userName, final String password, String toAddress, String toCC,
            String subject, String message) throws AddressException,
            MessagingException {
 
        // sets SMTP server properties
        Properties properties = new Properties();
        properties.put("mail.smtp.host", host);
        properties.put("mail.smtp.port", port);
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
 
        // creates a new session with an authenticator
        Authenticator auth = new Authenticator() {
            public PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(userName, password);
            }
        };
 
        Session session = Session.getInstance(properties, auth);
 
        // creates a new e-mail message
        Message msg = new MimeMessage(session);
 
        msg.setFrom(new InternetAddress(userName));
        InternetAddress[] toAddresses = { new InternetAddress(toAddress) };
        InternetAddress[] toCCC = { new InternetAddress(toCC) };
        msg.setRecipients(Message.RecipientType.TO, toAddresses);
        msg.setRecipients(Message.RecipientType.CC, toCCC);
        msg.setSubject(subject);
        msg.setSentDate(new Date());
        msg.setText(message);
 
        // sends the e-mail
        Transport.send(msg);
 
    }
}