原生 jakarta.mail 例子

		
        <!-- Source: https://mvnrepository.com/artifact/com.sun.mail/jakarta.mail -->
        <dependency>
            <groupId>com.sun.mail</groupId>
            <artifactId>jakarta.mail</artifactId>
            <version>2.0.2</version>
            <scope>compile</scope>
        </dependency>		
		
		

			
package cn.netkiller.component;

import jakarta.activation.DataHandler;
import jakarta.activation.URLDataSource;
import jakarta.mail.*;
import jakarta.mail.internet.*;
import org.springframework.resilience.annotation.Retryable;
import org.springframework.stereotype.Component;

import java.net.URL;
import java.util.*;

@Component
public class EmailComponent {

    protected final Map<String, SequencedMap<String, String>> emailAccount = new HashMap<String, SequencedMap<String, String>>() {{
        put("outlook", new LinkedHashMap<>() {{
            put("host", "smtp-mail.outlook.com");
            put("port", "587");
            put("auth", "true");
            put("username", "netkiller@outlook.com");
            put("password", "5BtS7vR4");
        }});
        put("exmail", new LinkedHashMap<>() {{
            put("host", "smtp.exmail.qq.com");
            put("port", "465");
            put("auth", "true");
            put("username", "neo@netkiller.cn");
            put("password", "h2yVh5XJ2vyg972i");
        }});
    }};

    @Retryable(
            value = {MessagingException.class}
    )
    public void sendEmailWithAttachment(String to, String subject, String body, String filePath) throws Exception {

        SequencedMap<String, String> account = emailAccount.get("outlook");
// 配置SMTP服务器
        Properties properties = new Properties();
        properties.put("mail.smtp.host", account.get("host")); // 替换为SMTP服务器地址
        properties.put("mail.smtp.port", account.get("port"));
        properties.put("mail.smtp.auth", account.get("auth"));
        properties.put("mail.user", account.get("username"));
        properties.put("mail.password", account.get("password"));
// TLS
        properties.put("mail.smtp.starttls.enable", "true");
        properties.put("mail.smtp.starttls.required", "true");
// SSL
//        properties.put("mail.transport.protocol", "smtps");
//        properties.put("mail.smtp.ssl.enable", "true");

        properties.put("mail.smtp.ssl.protocols", "TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;");
        properties.put("mail.smtp.ssl.ciphersuites", "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:DES-CBC3-SHA:RC4-MD5:RC4-SHA;");
        properties.put("mail.smtp.ssl.trust", "*"); // 信任所有证书
        properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        properties.put("mail.smtp.socketFactory.fallback", "false");


// 创建会话
        Session session = Session.getInstance(properties, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(account.get("username"), account.get("password")); // 替换为邮箱和授权码
            }
        });
        session.setDebug(true);

// 创建邮件
        MimeMessage message = new MimeMessage(session);
        message.setFrom(new InternetAddress(account.get("username")));
        message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
        message.setSubject(subject);

// 设置邮件内容和附件
        Multipart multipart = new MimeMultipart();

// 添加文本内容
        MimeBodyPart textPart = new MimeBodyPart();
        textPart.setText(body);
        multipart.addBodyPart(textPart);

// 添加附件
//        MimeBodyPart attachmentPart = new MimeBodyPart();
//        attachmentPart.attachFile(filePath);
//        multipart.addBodyPart(attachmentPart);

        // URL 网络附件
        String url = "https://www.baidu.com/img/PCtm_d9c8750bed0b3c7d089fa7d55720d6cf.png";
        MimeBodyPart attachmentPart = new MimeBodyPart();
        attachmentPart.setDataHandler(new DataHandler(new URLDataSource(new URL(url))));
        attachmentPart.setFileName(MimeUtility.encodeText("logo.png"));
        multipart.addBodyPart(attachmentPart);

        message.setContent(multipart);
// 发送邮件
        Transport.send(message);
    }
}