Java实现发送邮件并携带附件

<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";//发送人邮箱
    public static final String senderCode = "ixxxxxxxxxxxdcd";//发送人邮箱授权码
    public static final String emailSMTPHost = "smtp.qq.com";//服务器地址
 
    public static final String receiveMailAccount = "xxxxx@qq.com";//收件人邮箱
    public static final String ccMailAccount = "xxxxx@163.com";//抄送人邮箱
    public static final String bccmailAccount = "xxxxxx@qq.com";//密送人邮箱
 
    /*发送邮件*/
    public static void sendMail() {
        try {
            Properties props = new Properties();
            props.setProperty("mail.transport.protocol", "smtp");// 使用的协议
            props.setProperty("mail.smtp.host", emailSMTPHost);// 发件人的邮箱的SMTP服务器地址
            props.setProperty("mail.smtp.auth", "true");// 需要请求认证
 
            Session session = Session.getInstance(props);//得到会话对象实例
            
            session.setDebug(false);//是否打印详细日志
            
            MimeMessage message = createMimeMessage(session);//获取邮件对象（封装了一个方法）
 
            Transport transport = session.getTransport();
 
            transport.connect(SenderEmail, senderCode);//连接发送人的邮箱账户
 
            // 6. 发送邮件, 发到所有的收件地址, message.getAllRecipients() 获取到的是在创建邮件对象时添加的所有收件人, 抄送人, 密送人
            transport.sendMessage(message, message.getAllRecipients());
 
            // 7. 关闭连接
            transport.close();
 
            log.info("邮件发送成功");
        } catch (Exception e) {
            log.error("发送邮件失败");
        }
 
    }

 
    public static MimeMessage createMimeMessage(Session session) throws Exception {
        // 1. 创建一封邮件
        MimeMessage message = new MimeMessage(session);
 
        // 2. From: 发件人
        message.setFrom(new InternetAddress(SenderEmail, "发件人", "UTF-8"));
 
        // 3. 设置收件人、抄送人、密送人
        //MimeMessage.RecipientType.TO：收件类型；MimeMessage.RecipientType.CC：抄送类型；MimeMessage.RecipientType.BCC：密送类型
        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: 邮件主题
        message.setSubject("这是邮件的主题", "UTF-8");
 
        // 5. Content: 邮件正文（可以使用html标签）
        message.setContent("这是邮件正文", "text/html;charset=UTF-8");
 
*****************以下部分为携带附件代码，不需要携带附件的可删除星号圈起的部分*************************
        MimeMultipart multipart = new MimeMultipart();
        MimeBodyPart file1 = new MimeBodyPart();
        DataHandler handler = new DataHandler(new FileDataSource("文件路径"));
        file1.setDataHandler(handler);
        //对文件名进行编码，防止出现乱码
        String fileName = MimeUtility.encodeWord("文件名", "utf-8", "B");
        file1.setFileName(fileName);
        multipart.addBodyPart(file1);
        message.setContent(multipart);
*******************************************************************************************
 
        // 6. 设置发件时间
        message.setSentDate(new Date());
 
        // 7. 保存设置
        message.saveChanges();
 
        return message;
    }
}