Java发送邮件的简单实现

使用Oracle官方的JavaMail进行实现，JavaMail下载地址：​​https://java.net/projects/javamail/pages/Home​​

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

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.MimeMessage;

public class SimpleMail {
    public static void main(String[] args) {
        Properties props = new Properties();
        //这里使用smtp协议发送邮件。我的新浪邮箱是.cn的不是.com的，所以smtpserver为smtp.sina.cn
        props.put("mail.smtp.host", "smtp.sina.cn");
        Session session = Session.getInstance(props, null);

        try {
            MimeMessage msg = new MimeMessage(session);
            //设置发件人邮箱
            msg.setFrom("[e-mail]");
            //设置收件人邮箱
            msg.setRecipients(Message.RecipientType.TO, "[e-mail]");
            //设置主题
            msg.setSubject("This is a test");
            //设置日期
            msg.setSentDate(new Date());
            //设置正文内容
            msg.setText("How are you?\nThis is a test, please do not reply!");
            //发送邮件，參数为邮件信息，发件人邮箱和发件人邮箱password
            Transport.send(msg, "[e-mail]", "这里是发件人的password");
        } catch (MessagingException mex) {
            System.err.println("Send failed! Exception: " + mex);
        }
    }
}

JavaMail中比較重要的的类是Session、Store和Folder。