import java.util.Date;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import org.apache.log4j.Logger;

public class MailUtil {

    private static Logger logger = Logger.getLogger(MailUtil.class);

    /**
     * 发送邮件
     * 
     * @param smtp
     *            SMTP服务器
     * @param user
     *            用户名
     * @param password
     *            密码
     * @param subject
     *            标题
     * @param content
     *            邮件内容
     * @param from
     *            发件人邮箱
     * @param to
     *            收件人邮箱
     */
    public static void send(String smtp, final String user,
            final String password, String subject, String content, String from,
            String to) {
        try {
            Properties props = new Properties();
            props.put("mail.smtp.host", smtp);
            props.put("mail.smtp.auth", "true");
            Session ssn = Session.getInstance(props, new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(user, password);
                }

            });
            MimeMessage message = new MimeMessage(ssn);//由邮件会话新建一个消息对象 
            InternetAddress fromAddress = new InternetAddress(from);//发件人的邮件地址 
            message.setFrom(fromAddress);//设置发件人 
            InternetAddress toAddress = new InternetAddress(to);//收件人的邮件地址 
            message.addRecipient(Message.RecipientType.TO, toAddress);//设置收件人
            message.setSubject(subject);//设置标题
            message.setText(content);//设置内容
            message.setSentDate(new Date());//设置发信时间 

            Transport transport = ssn.getTransport("smtp");
            transport.connect(smtp, user, password);
            transport.sendMessage(message, message
                    .getRecipients(Message.RecipientType.TO));
            // transport.send(message);
            transport.close();
            logger.info("邮件发送成功");
        } catch (Exception e) {
            logger.warn("邮件发送失败", e);
        }
    }
}