Java发送邮件

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package dcampus;

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/**
 *发送邮件测试通过
 * @author He Jianfei
 */
public class JavaMail {

    private String host;
    private String from;
    private String to;
    private String subject;
    private String content;
    private boolean authentication;
    private String username;
    private String password;

    public void sendMail(String host, String from, String to, String subject,
            String content, boolean authentication, String username,
            String password) throws MessagingException {
        //  Get system properties
        Properties props = System.getProperties();
        //  Setup mail server
        props.put("mail.smtp.host", host);
        if (!authentication) {
            props.put("mail.smtp.auth", "false");
        } else {
            props.put("mail.smtp.auth", "true");
        }
        //  Get session
        Session session = Session.getDefaultInstance(props, null);
        // Define message
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject(subject);
        message.setContent(content, "text/html;charset=gb2312");
        // Send message
        if (authentication) {
            Transport smtp = null;
            try {
                smtp = session.getTransport("smtp");
                smtp.connect(host, username, password);
                smtp.sendMessage(message, message.getAllRecipients());
            } catch (AddressException e) {
                e.printStackTrace();
            } catch (MessagingException e) {
                e.printStackTrace();
            } finally {
                smtp.close();
            }
        } else {
            Transport.send(message);
        }
    }

    public void send() throws MessagingException {
        host = "smtp.scut.edu.cn";
        from = "junwang@scut.edu.cn";
        to = "wj_526@sina.com";
        subject = "just for test";
        content = "Beijing Olympic";
        authentication = true;
        username = "xxxxxxxx";
        password = "xxxxxx";
        sendMail(host, from, to, subject, content, authentication, username, password);
    }

    public static void main(String args[]) throws MessagingException {
        JavaMail jm = new JavaMail();
        jm.send();
    }
}