您的问题不是很清楚。让我弄清需求吧；您只需要成功注册即可将代码发送给用户的代码。正确？
在您的servlet（在Submit操作中调用）中，
if(user input is valid){ Step1: registerUser(); Step2: send confirmationEmail();} else { Step3: Exception case}发送电子邮件方法理想情况下会将请求发送到JMS（队列），以将电子邮件发送给所需的用户。以下是发送电子邮件的代码段。
//Sample java pre to send emailpublic void sendEmail(){ try{ Properties props = null; if (props == null) { props = System.getProperties(); } props.put("mail.smtp.host", "<server host name>"); Session session = Session.getInstance(props, null); MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress("<from email id>")); message.addRecipients(Message.RecipientType.CC, "<Registered user email id>"); message.setSubject("<Subject of the email>"); message.setContent("<Content of the email>", "text/plain"); Transport.send(message); logger.info("Sent Email :" + "From :" + message.getFrom() + "To:" + message.getAllRecipients() + "Subject:" + message.getSubject() ); } catch(Exception ex){ ex.printStackTrace(); } }
