javamail使用示例

1、  下载javamail以及jaf(如使用jdk6则不用)，地址分别为61C0BCFFD3F10BFD928C3D8C7718423 和706F9CE9A4EFE38DA6E ，若有变动，可到sum的top downloads里面找，

2、  解压获得mail.jar和activation.jar，将其放在classpath或工程目录下

3、  用法示例

import javax.mail.*;
import javax.mail.internet.*;
try {
        String mailSever = "smtp.126.com";
        String from = "[e-mail]";
        String to = "[e-mail]";
        String userName= "sender";
        String passwd = "password";
        String subject = "The exam";
        String content = "Can you notice me of the exam?";
            
        java.util.Properties props = System.getProperties();
        props.put("mail.host", mailSever);
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.auth","true");
        Authenticator auth = new MyAuth(userName, passwd);
        javax.mail.Session mailSession = javax.mail.Session.getDefaultInstance(props, auth);
        mailSession.setDebug(true);
        Message msg = new MimeMessage(mailSession);
        msg.setFrom(new InternetAddress( from ));
        msg.setRecipient(Message.RecipientType.TO, new InternetAddress( to ));
        msg.setSubject(subject);
        msg.setSentDate(new java.util.Date());
        msg.setText(content);
        Transport.send(msg);
        System.out.println(" Sucess !");            
    } catch (AddressException e) {
        e.printStackTrace();
    } catch (MessagingException e) {
        e.printStackTrace();
}


其中MyAuth类的定义为：

class MyAuth extends Authenticator

{
        String UserName = null;
        String Password = null;
    
        public MyAuth(String UserName,String Password) {
            this.UserName = UserName;
            this.Password = Password;
        }
    
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(UserName, Password);
        }
    }

特别注意props.put("mail.smtp.auth","true");这句很重要，否则容易招致Relay access denied的异常

另外，目前发现无法用gmail邮箱发邮件，但可以用它收邮件。不知道google搞什么鬼，这么吝啬。