用Java发送邮件 smtp验证码问题

package cn.estore.utils;

import java.util.Properties;

import javax.mail.Authenticator;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.PasswordAuthentication;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMessage.RecipientType;

public class MailUtils {

public static void sendMail(String email, String emailMsg) throws MessagingException {
// 1.创建一个程序与邮件服务器会话对象 Session

Properties props = new Properties();
props.setProperty("mail.transport.protocol", "SMTP");
props.setProperty("mail.host", "smtp.163.com");
props.setProperty("mail.smtp.auth", "true");// 指定验证为true

// 创建验证器
Authenticator auth = new Authenticator() {
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("username", "password");//注意此处password为smtp验证码，不是密码
}
};

Session session = Session.getInstance(props, auth);

// 2.创建一个Message，它相当于是邮件内容
Message message = new MimeMessage(session);

message.setFrom(new InternetAddress("activecodezy@163.com")); // 设置发送者

message.setRecipient(RecipientType.TO, new InternetAddress(email)); // 设置发送方式与接收者

message.setSubject("用户激活");
// message.setText("这是一封激活邮件，请<a href='#'>点击</a>");

message.setContent(emailMsg, "text/html;charset=utf-8");

// 3.创建 Transport用于将邮件发送

Transport.send(message);
}

}