Java发送邮件的代码详解编程语言

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); 
        } 
    } 
}