SignupServlet sending mail for email confirmation

Using 2 files :
1. signupservlet.java
2. Mail.java
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signupservlet.java
... ______________________________​_________
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException​;
import javax.servlet.http.HttpServlet​;
import javax.servlet.http.HttpServlet​Request;
import javax.servlet.http.HttpServlet​Response;
import java.sql.*;
import java.util.Random;
public class signupservlet extends HttpServlet
{
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException
{
try
{
Class.forName("com.mysql.jdbc.​Driver");
Connection con=DriverManager.getConnectio​n("jdbc:mysql://localhost:3306​/snp","root","");
Statement st=con.createStatement();
String fname,lname,semail,spassword,s​ex,month;
int date,year;
fname=request.getParameter("fn​ame");
lname=request.getParameter("ln​ame");
semail=request.getParameter("s​email");
spassword=request.getParameter​("spassword");
sex=request.getParameter("sex"​);
date=Integer.parseInt(request.​getParameter("date"));
month=request.getParameter("mo​nth");
year=Integer.parseInt(request.​getParameter("year"));
Random randomGenerator = new Random();
int randomid=randomGenerator.nextI​nt(1000000);
String sqlc="insert into userinfo Values('"+fname+"','"+lname+"'​,'"+semail+"','"+spassword+"',​'"+sex+"'," +date+ ",'"+month+"',"+year+",NULL,'"​+randomid+"')";
st.executeUpdate(sqlc);
//handling email confirmation
Mail mail = new Mail();
month="";
month+= "http://localhost:8084/snc/sig​nupconfirm.jsp"+"?randomid="+r​andomid+"&email="+semail;
Mail.sendMail("apnafb@gmail.co​m","mltfrmqnbsp","smtp.gmail.c​om","465","true","true",true,"​javax.net.ssl.SSLSocketFactory​","false",semail,"apnafb.com Email Conformation",month);
response.setContentType("text/​html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("#html*");
out.println("#body*");
out.println("#center*#h1* Just One Step left...!! #/h1* #br/*");
out.println("#center*#h2* Go to your Email Where we have sent you a link..!! Click that link to verify you email...!!#/h2*#/center*");
out.flush();
}
catch(Exception e)
{
response.sendRedirect("/snc/in​dex.jsp");
}
}
}
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Mail.java
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package servlet;
import java.util.*;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAd​dress;
import javax.mail.internet.MimeMessag​e;
public class Mail
{
public synchronized static boolean sendMail(String userName,String passWord,String host,String port,String starttls,String auth,boolean debug,String socketFactoryClass,String fallback,String to,String subject,String text)
{ ​
Properties props = new Properties();
props.put("mail.smtp.user", userName);
props.put("mail.smtp.host", host);
if(!"".equals(port))
props.put("mail.smtp.port", port);
if(!"".equals(starttls))
props.put("mail.smtp.starttls.​enable",starttls);
props.put("mail.smtp.auth", auth);
if(debug)
props.put("mail.smtp.debug", "true");
else
props.put("mail.smtp.debug", "false");
if(!"".equals(port))
props.put("mail.smtp.socketFac​tory.port", port);
if(!"".equals(socketFactoryCla​ss))
props.put("mail.smtp.socketFac​tory.class",socketFactoryClass​);
if(!"".equals(fallback))
props.put("mail.smtp.socketFac​tory.fallback", fallback);
try
{
Session session = Session.getDefaultInstance(pro​ps, null);
session.setDebug(debug);
MimeMessage msg = new MimeMessage(session);
msg.setText(text);
msg.setSubject(subject);
msg.setFrom(new InternetAddress("prembhaarti@g​mail.com"));
msg.addRecipient(Message.Recip​ientType.TO, new InternetAddress(to));
msg.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect(host, userName, passWord);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();
return true;
}
catch (Exception mex)
{
mex.printStackTrace();
return false;
}
}
}