java发送Email

/**
 发送邮件的方法
 @param mailStr  -  发送的邮件体
**/
 public void sendMail(String mailStr){
       try {
           Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
           final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
           // Get a Properties object
           Properties props = System.getProperties();
           props.setProperty("mail.smtp.host", getHost());
           props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
           props.setProperty("mail.smtp.socketFactory.fallback", "false");
           props.setProperty("mail.smtp.starttls.enable", "true");
           props.setProperty("mail.smtp.startssl.enable", "true");
           props.setProperty("mail.smtp.port", this.getPort());
           props.put("mail.smtp.auth", "true");
           Session session = Session.getDefaultInstance(props, new Authenticator(){
               protected PasswordAuthentication getPasswordAuthentication() {
                   return new PasswordAuthentication(userName,password);
               }