使用java.mail发送邮件

一、导入pom依赖

<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.2</version>
</dependency>

二、代码实现

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.*;
import java.io.UnsupportedEncodingException;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.Properties;

public class MailWithAttachment {
    public static void main(String[] args) throws UnsupportedEncodingException, MessagingException, com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException {
        Properties properties = new Properties();
        properties.setProperty("mail.transport.protocol","smtp");
        properties.setProperty("mail.smtp.host","smtp.aliyun.com");
        properties.setProperty("mail.smtp.port","465");
        properties.setProperty("mail.smtp.auth","true");
        properties.setProperty("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
        properties.setProperty("mail.smtp.socketFactory.fallback","false");
        properties.setProperty("mail.smtp.socketFactory.port","465");

        Session session = Session.getInstance(properties);
        session.setDebug(true);
        MimeMessage mimeMessage = createMimeMessage(session,"properties@aliyun.com","495356619@qq.com");
        Transport transport = session.getTransport();
        transport.connect("properties@aliyun.com","properties123");
        transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());
        transport.close();


    }

    public static MimeMessage createMimeMessage(Session session,String send,String recipient) throws MessagingException, UnsupportedEncodingException, com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException {
        MimeMessage mimeMessage = new MimeMessage(session);
        mimeMessage.setSubject("setSubject是标题", StandardCharsets.UTF_8.name());
        InternetAddress internetAddress = new InternetAddress(send,"personal是发件人的名字",StandardCharsets.UTF_8.name());
        mimeMessage.setFrom(internetAddress);

        // 创建图片节点
        MimeBodyPart imagePart = new MimeBodyPart();
        DataHandler imageDataHandler = new DataHandler(new FileDataSource("S:/01.png")); //图片地址
        imagePart.setDataHandler(imageDataHandler);
        imagePart.setContentID("myImage");

        // 创建文本节点
        MimeBodyPart textPart = new MimeBodyPart();
        textPart.setContent("这是正文内容image:<img src='cid:myImage' />","text/html;charset=utf-8");

        // 将文本节点，图片节点 --> 组装
        MimeMultipart mm_text_image = new MimeMultipart();
        mm_text_image.addBodyPart(imagePart);
        mm_text_image.addBodyPart(textPart);
        mm_text_image.setSubType("related");

        // 注意：正文中 只能出现MimeBodyPart普通节点 不能出现复合节点只能出现MimeMultipart普通节点
        // MimeMultipart -> MimeBodyPart
        MimeBodyPart text_image_bodyPart = new MimeBodyPart();
        text_image_bodyPart.setContent(mm_text_image);

        // 附件
        MimeBodyPart attachment = new MimeBodyPart();
        DataHandler fileDataHandler = new DataHandler(new FileDataSource("S:/02.png"));
        attachment.setDataHandler(fileDataHandler);
        //给附件设置文件名
        attachment.setFileName(MimeUtility.encodeText(fileDataHandler.getName()));

        // 将刚才处理好的”文本+图片“节点 与 附件 设置成一个新的 复合节点
        MimeMultipart mm = new MimeMultipart();
        mm.addBodyPart(text_image_bodyPart);
        mm.addBodyPart(attachment);
        mm.setSubType("mixed"); //混合关系

        mimeMessage.setContent(mm,"text/html;charset=utf-8");

        InternetAddress recipientAddress = new InternetAddress(recipient, "personal是收件人的名称", StandardCharsets.UTF_8.name());
        mimeMessage.setRecipient(MimeMessage.RecipientType.BCC,recipientAddress);
        mimeMessage.setSentDate(new Date());
        mimeMessage.saveChanges();
        return mimeMessage;

    }
}