常用邮箱工具类

 废话不多说 直接上代码 自个耍↓↓↓

package com.example.demo.util;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

/**
 * DATE: 2023/9/1
 * Author: Alun
 */
public class EmailUtil {
    public static void sendEmail(String host, String port, final String username, final String password,
                                 String toAddress, String subject, String message, String attachmentPath) throws MessagingException {
        // 设置邮件属性
        Properties props = new Properties();
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.port", port);

        // 创建会话对象
        Session session = Session.getInstance(props, new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
        });

        try {
            // 创建邮件消息
            Message emailMessage = new MimeMessage(session);
            emailMessage.setFrom(new InternetAddress(username));
            emailMessage.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toAddress));
            emailMessage.setSubject(subject);

            // 创建消息体部分
            MimeBodyPart messageBodyPart = new MimeBodyPart();
            messageBodyPart.setText(message);

            // 创建附件部分
            MimeBodyPart attachmentPart = new MimeBodyPart();
            attachmentPart.attachFile(attachmentPath);

            // 创建多部分消息
            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(messageBodyPart);
            multipart.addBodyPart(attachmentPart);

            // 设置消息内容
            emailMessage.setContent(multipart);

            // 发送邮件
            Transport.send(emailMessage);

            System.out.println("邮件发送成功！");
        } catch (MessagingException e) {
            System.out.println("邮件发送失败！");
            throw e;
        }catch (Exception e){
            System.out.println("附件添加失败！");
            throw e;
        }
    }
}

package com.example.demo;

import com.example.demo.util.EmailUtil;

import javax.mail.MessagingException;

/**
 * DATE: 2023/9/1
 * Author: Alun
 */
public class EmailText {
    public static void main(String[] args) {
        //个别参数晚上一大把 直接百度
        String host = "smtp.example.com"; // SMTP服务器地址
        String port = "587"; // SMTP服务器端口
        String username = "your_email@example.com"; // 发件人邮箱
        String password = "your_password"; // 发件人邮箱密码
        String toAddress = "recipient@example.com"; // 收件人邮箱
        String subject = "测试邮件"; // 邮件主题
        String message = "这是一封测试邮件。"; // 邮件内容
        String attachmentPath = "path_to_attachment_file"; // 附件文件路径

        try {
            EmailUtil.sendEmail(host, port, username, password, toAddress, subject, message, attachmentPath);
        } catch (MessagingException e) {
            e.printStackTrace();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

本人用163邮箱测试的,常见报错问题如下:

类似这种问题 说明已经成功了一半 还需设置一下163客户端授权码

开启成功后 会发送 "成功开启IMAP/SMTP服务，在第三方客户端登录时，登录密码输入以下授权密码" 然后把改密码复制粘贴到 对应测试类中的password(发件人密码)! 以下就是成功发送后 返回结果

校验是否成功 还可以去邮箱查看 已发送 就能找到对应发送 邮件~~~~