<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.5.0-b01</version>
</dependency>

import lombok.extern.slf4j.Slf4j;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.*;
import java.util.Date;
import java.util.Properties;
 
@Slf4j
public class EmailUtils {
    public static final String SenderEmail = "xxxxx@qq.com";//發(fā)送人郵箱
    public static final String senderCode = "ixxxxxxxxxxxdcd";//發(fā)送人郵箱授權(quán)碼
    public static final String emailSMTPHost = "smtp.qq.com";//服務(wù)器地址
 
    public static final String receiveMailAccount = "xxxxx@qq.com";//收件人郵箱
    public static final String ccMailAccount = "xxxxx@163.com";//抄送人郵箱
    public static final String bccmailAccount = "xxxxxx@qq.com";//密送人郵箱
 
    /*發(fā)送郵件*/
    public static void sendMail() {
        try {
            Properties props = new Properties();
            props.setProperty("mail.transport.protocol", "smtp");// 使用的協(xié)議
            props.setProperty("mail.smtp.host", emailSMTPHost);// 發(fā)件人的郵箱的SMTP服務(wù)器地址
            props.setProperty("mail.smtp.auth", "true");// 需要請(qǐng)求認(rèn)證
 
            Session session = Session.getInstance(props);//得到會(huì)話(huà)對(duì)象實(shí)例
            
            session.setDebug(false);//是否打印詳細(xì)日志
            
            MimeMessage message = createMimeMessage(session);//獲取郵件對(duì)象（封裝了一個(gè)方法）
 
            Transport transport = session.getTransport();
 
            transport.connect(SenderEmail, senderCode);//連接發(fā)送人的郵箱賬戶(hù)
 
            // 6. 發(fā)送郵件, 發(fā)到所有的收件地址, message.getAllRecipients() 獲取到的是在創(chuàng)建郵件對(duì)象時(shí)添加的所有收件人, 抄送人, 密送人
            transport.sendMessage(message, message.getAllRecipients());
 
            // 7. 關(guān)閉連接
            transport.close();
 
            log.info("郵件發(fā)送成功");
        } catch (Exception e) {
            log.error("發(fā)送郵件失敗");
        }
 
    }

 
    public static MimeMessage createMimeMessage(Session session) throws Exception {
        // 1. 創(chuàng)建一封郵件
        MimeMessage message = new MimeMessage(session);
 
        // 2. From: 發(fā)件人
        message.setFrom(new InternetAddress(SenderEmail, "發(fā)件人", "UTF-8"));
 
        // 3. 設(shè)置收件人、抄送人、密送人
        //MimeMessage.RecipientType.TO：收件類(lèi)型；MimeMessage.RecipientType.CC：抄送類(lèi)型；MimeMessage.RecipientType.BCC：密送類(lèi)型
        message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMailAccount, "收件人", "UTF-8"));
        message.setRecipient(MimeMessage.RecipientType.CC, new InternetAddress(ccMailAccount, "抄送人", "UTF-8"));
        message.setRecipient(MimeMessage.RecipientType.BCC, new InternetAddress(bccmailAccount, "密送人", "UTF-8"));
 
        // 4. Subject: 郵件主題
        message.setSubject("這是郵件的主題", "UTF-8");
 
        // 5. Content: 郵件正文（可以使用html標(biāo)簽）
        message.setContent("這是郵件正文", "text/html;charset=UTF-8");
 
*****************以下部分為攜帶附件代碼，不需要攜帶附件的可刪除星號(hào)圈起的部分*************************
        MimeMultipart multipart = new MimeMultipart();
        MimeBodyPart file1 = new MimeBodyPart();
        DataHandler handler = new DataHandler(new FileDataSource("文件路徑"));
        file1.setDataHandler(handler);
        //對(duì)文件名進(jìn)行編碼，防止出現(xiàn)亂碼
        String fileName = MimeUtility.encodeWord("文件名", "utf-8", "B");
        file1.setFileName(fileName);
        multipart.addBodyPart(file1);
        message.setContent(multipart);
*******************************************************************************************
 
        // 6. 設(shè)置發(fā)件時(shí)間
        message.setSentDate(new Date());
 
        // 7. 保存設(shè)置
        message.saveChanges();
 
        return message;
    }
}