干货，某大厂小姐姐深夜让我说出了秘密-springboot发邮件-CFANZ编程社区

后端依赖

    <!--引入mail依赖-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-mail</artifactId>
    </dependency>
    <!--使用thymeleaf构建邮件模板-->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <!--验证码-->
    <dependency>
      <groupId>com.github.whvcse</groupId>
      <artifactId>easy-captcha</artifactId>
      <version>1.6.2</version>
    </dependency>

后端配置文件application.yml

spring:
  # 关闭thymeleaf缓存
  thymeleaf:
    cache: false
  mail:
    host: smtp.163.com
    username: 你的邮箱
    password: 你的邮箱授权码（163邮箱->设置->开启pop3smtp->获取授权码）
    default-encoding: UTF-8
    protocol: smtp
    properties:
      mail:
        smtp:
          auth: true # 启用SMTP认证
          starttls:
            enabled: true # 启用SMTP认证
            required: true # 必须采用加密链接

后端工具类

package com.test.empback.utils;

import java.io.File;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.mail.MailProperties;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import javax.mail.internet.MimeMessage;


@Component("mailUtils")
@Slf4j
public class MailUtils {
    @Autowired
    private MailProperties mailProperties;
    @Autowired
    private JavaMailSender mailSender;
    // 发送简单邮件

    public void sendSimpleMall(String to, String subject, String content) {
        try {
            SimpleMailMessage message = new SimpleMailMessage();
            message.setFrom(mailProperties.getUsername());
            message.setTo(to);
            message.setCc(mailProperties.getUsername());
            message.setSubject(subject);
            message.setText(content);

            mailSender.send(message);
        }
        catch(Exception e) {
            e.printStackTrace();
        }
    }

    // 发送带附件的邮件

    public void sendAttachFileMail(String to, String subject, String content, File file) {
        try {
            MimeMessage message = mailSender.createMimeMessage();
            MimeMessageHelper messageHelper = new MimeMessageHelper(message, true);
            //邮件发送人
            messageHelper.setFrom(mailProperties.getUsername());
            //邮件接收人
            messageHelper.setTo(to);
            //邮件主题
            message.setSubject(subject);
            //邮件内容
            messageHelper.setText(content);
            //添加附件
            messageHelper.addAttachment(file.getName(), file);
            //发送
            mailSender.send(message);

        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }

    // 发送HTML格式文件

    public void sendHtmlMail(String to, String subject, String content) {
        try {
            MimeMessage message = mailSender.createMimeMessage();
            MimeMessageHelper messageHelper = new MimeMessageHelper(message, true);
            //邮件发送人
            messageHelper.setFrom(mailProperties.getUsername());
            //邮件接收人
            messageHelper.setTo(to);
            //邮件主题
            message.setSubject(subject);
            //邮件内容
            messageHelper.setText(content, true);
            //发送
            mailSender.send(message);

        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

后端邮件html模板：这个必须方法resource下边的templates文件夹下

文件名：mailtemplate.html

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">

<head>
    <title>邮箱验证</title>
    <meta charset="utf-8">
</head>

<body>
<!-- 头部 -->
<div style="padding: 10px; background-color: #393D49;">
    <h2 style="color: #FFFFFF; margin: 0px;">人事招聘系统</h2>
</div>
<!-- 内容 -->
<div style="padding-top: 10px; padding-bottom: 10px;">
    <div style="background-color: snow; padding: 20px;">
        <div>
            <h3>尊敬的用户：您好！</h3>
            <p>说明：您现在正在进行敏感操作，为了确保您的账户安全，我们将通过邮件对您进行身份验证。</p>
            <p th:text="${message}"></p>
            <div>
                <h4>本次的验证码为：</h4>
                <div style="background-color: #EBEEF5; padding: 10px;">
                    <h3 th:text="${code}"></h3>
                </div>
                <h4>有效期为1分钟</h4>
            </div>
            <p style="margin-top: 15px;">发件人：人事招聘管理系统</p>
        </div>
    </div>
</div>
<!-- 页底 -->
<div style="padding: 10px; text-align: center; background-color: #2F4056;">
    <p style="margin: 0px; color: #FFFFFF;">Copyright © 2020 <a href="http://localhost:8080/" style="color: #FFFFFF;">人事招聘系统</a> All Rights Reserved.</p>
</div>

</body>

</html>

控制器发送邮件

public void sendCode(String userName,String email) {
        try {
            // 随机生成验证码
            SpecCaptcha captcha = new SpecCaptcha(10, 10, 4);
            captcha.setCharType(Captcha.TYPE_ONLY_NUMBER);
            // 存入键值对并设置过期时间（1分钟内有效）
            redisUtil.set(CommonConstant.PREFIX_PASSFIND_CODE+userName,captcha.text(),CommonConstant.PASSFIND_CODE_EXPIRE_TIME);

            String message = "详情：您正在尝试进行找回密码操作，若非是您本人的行为，请忽略!";
            // 设置邮件内容
            Context context = new Context();
            context.setVariable("message", message);
            context.setVariable("code", captcha.text());
            String mail = templateEngine.process("mailtemplate.html", context);
            // 发送邮件
            mailUtils.sendHtmlMail(email, "邮箱验证码", mail);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

完事，这就是所有的实现了，最后截个图

干货，某大厂小姐姐深夜让我说出了秘密-springboot发邮件_spring