JavaWeb —— JavaMail邮件发送

用户注册时需要给用户填写的邮箱发送一封激活邮件

一、引入jar包：

mail.jar

activation.jar

二、发送邮件的工具类

public class MailUtils extends Thread {
    //给用户发送邮件的邮箱
    private String from = "xxxxxx@163.com";
    //发送邮件的服务器地址
    private String host = "smtp.163.com";
    //邮箱的用户名
    private String username = "xxxxxx";
    //邮箱的授权码
    private String password = "xxxxxx";

    private String email;
    private String emailMsg;

    public MailUtils(String email, String emailMsg) {
        this.email = email;
        this.emailMsg = emailMsg;
    }

    @Override
    public void run() {
        try {
            //创建Properties对象，并设置邮件服务器的基本信息
            Properties properties = new Properties();
            //设置邮件传输协议为SMTP
            properties.setProperty("mail.transport.protocol", "SMTP");
            //设置SMTP服务器地址
            properties.setProperty("mail.host", host);
            //设置SMTP服务器是否需要用户验证，需要验证设置为true
            properties.setProperty("mail.smtp.auth", "true");
            //创建验证器
            Authenticator auth = new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(username,password);
                }
            };
            //实例化邮件会话Session,发送邮件的环境
            Session session = Session.getInstance(properties, auth);
            Message message = sendMail(session, email, emailMsg);
            //发送邮件
            Transport.send(message);
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }

    public Message sendMail(Session session, String email, String emailMsg) throws AddressException, MessagingException {
        //创建一个Message,该内容相当于邮件内容
        Message message = new MimeMessage(session);
        //设置发送者
        message.setFrom(new InternetAddress(from));
        //设置发送方式与接收者，邮件接收者在调用sendMail()方法时通过参数传递进来
        message.setRecipient(RecipientType.TO, new InternetAddress(email));
        //设置发送邮件主题
        message.setSubject("用户注册");
        message.setContent(emailMsg, "text/html;charset=utf-8");
        return message;
    }
}

三、创建该工具类完成邮件发送

//user.getEmail():接收邮件的地址，eamilMsg:邮件发送的内容，邮件发送比较慢利用线程提高发送的速度
String eamilMsg="xxxxxxxxxxxxx";
new MailUtils(user.getEmail(), eamilMsg).start();

163邮箱授权码开启：