java后台实现发送邮件的功能

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package test;import java.util.Date;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;public class SendEmail { public static final String HOST = "smtp.163.com";    public static final String PROTOCOL = "smtp";       public static final int PORT = 25;    public static final String FROM = "*****@163.com";//发件人的email    public static final String PWD = "*****";//发件人密码(授权密码)         /**     * 获取Session     * @return     */    private static Session getSession() {        Properties props = new Properties();        props.put("mail.smtp.host", HOST);//设置服务器地址        props.put("mail.store.protocol" , PROTOCOL);//设置协议        props.put("mail.smtp.port", PORT);//设置端口        props.put("mail.smtp.auth" , "true");//身份认证                 Authenticator authenticator = new Authenticator() {             @Override            protected PasswordAuthentication getPasswordAuthentication() {                return new PasswordAuthentication(FROM, PWD);            }                     };        Session session = Session.getDefaultInstance(props , authenticator);                 return session;    }    public static void send(String toEmail , String content) {        Session session = getSession();        try {            System.out.println("--send--"+content);            // Instantiate a message            Message msg = new MimeMessage(session);              //Set message attributes            msg.setFrom(new InternetAddress(FROM));            InternetAddress[] address = {new InternetAddress(toEmail)};            msg.setRecipients(Message.RecipientType.TO, address);            msg.setSubject("账号激活邮件");            msg.setSentDate(new Date());            msg.setContent(content , "text/html;charset=utf-8");              //Send the message            Transport.send(msg);        }        catch (MessagingException mex) {            mex.printStackTrace();        }    }    }
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