java mail(SSL)

public class MailAction extends BaseAction {
    private String smtphost = Constants.MAIL_SERVER_IP; // ·¢ËÍÓʼþ·þÎñÆ÷IP
    private int port = Constants.MAIL_SERVER_PORT;  // ·¢ËÍÓʼþ·þÎñÆ÷¶Ë¿Ú
    private String user1 = Constants.MAIL_SERVER_USER; // Óʼþ·þÎñÆ÷µÇ¼Óû§Ãû
    private String password = Constants.MAIL_SERVER_PASSWORD; // Óʼþ·þÎñÆ÷µÇ¼ÃÜÂë
    private String from = Constants.MAIL_SENDPASSWROD_SENDER_ADDRESS; // ·¢ËÍÈËÓʼþµØÖ·
    private String subject = "»ù´¡ÃÜÔ¿ÐÞ¸Ä֪ͨ!"; // Óʼþ±êÌâ

    public String sendMail(String to, String body) {
        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
        final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
        Properties props = new Properties();
        props.put("mail.smtp.host", smtphost);
        props.put("mail.smtp.socketFactory.class", SSL_FACTORY);
        props.put("mail.smtp.socketFactory.fallback", "false");
        props.put("mail.smtp.port", port);
        props.put("mail.smtp.socketFactory.port", port);
        props.put(