common-utils/src/main/java/com/echepei/utils/mail/MailUtil.java

package com.echepei.utils.mail;

import com.echepei.dto.mail.MailDto;
import com.echepei.enums.MailTypeEnum;
import jakarta.mail.Authenticator;
import jakarta.mail.PasswordAuthentication;
import jakarta.mail.Session;

import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

/**
 * @author Rain
 */
public class MailUtil {


    private static final Map<String, Session> SESSION_MAP = new HashMap<>(20);


    public static Session getSession(MailDto mailDto) {
        // 如果存在则直接返回
        if (SESSION_MAP.containsKey(mailDto.getMailFrom())) {
            return SESSION_MAP.get(mailDto.getMailFrom());
        }
        MailTypeEnum mailTypeEnum = MailTypeEnum.getMailTypeEnum(mailDto.getMailType());
        if (mailTypeEnum == null) {
            throw new RuntimeException("邮箱类型错误");
        }
        Properties properties = new Properties();
        properties.put("mail.smtp.host", mailTypeEnum.mailSmtpHost);
        properties.put("mail.smtp.port", mailTypeEnum.mailSmtpPort);
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.starttls.enable", "true");
        Session session = Session.getInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(mailDto.getMailUserName(), mailDto.getMailPassword());
            }
        });
        SESSION_MAP.put(mailDto.getMailFrom(), session);
        return session;
    }


}