Mail.java

package database;
import com.sun.xml.internal.bind.v2.runtime.reflect.Lister;
import io.netty.channel.ChannelHandlerContext;
import network.Handler;
import packet.Packet;

import java.util.List;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Created by ksy98_000 on 2016-12-30.
 */

public class Mail {
    final private String username = "indizss99@gmail.com";
    final private String password = "tnddusdl12";
    private static Logger logger = Logger.getLogger(Handler.class.getName());

    public void sendmail(ChannelHandlerContext ctx, String email, String _password){

        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.port", "25");
        props.put("mail.debug", "false");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable","true");
        props.put("mail.smtp.EnableSSL.enable","true");

        props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.setProperty("mail.smtp.socketFactory.fallback", "false");
        props.setProperty("mail.smtp.port", "465");
        props.setProperty("mail.smtp.socketFactory.port", "465");


        Session session = Session.getInstance(props,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(username, password);
                    }});

        try{
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("indizss99@gmail.com"));//
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse(email));
            message.setSubject("시나브로 온라인 비밀번호 찾기");
            message.setText("시나브로 온라인 비밀번호 찾기 결과입니다."
                    + "\n\n 회원님의 비밀번호는 [   " + _password + "   ] 입니다." + "\n감사합니다.");
            Transport.send(message);
            logger.log(Level.INFO, "이메일 " + email + " 님에게 비밀번호 찾기용 메일이 전송되었습니다.");
            ctx.writeAndFlush(Packet.loginMessage(3));
        } catch(Exception e){
            e.printStackTrace();
            ctx.writeAndFlush(Packet.loginMessage(4));
        }
    }
}