导包

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

创建java类

结构是这样的

MailService接口

package com.zq.email.service;
 public interface MailService {
    /**
     * 发送邮件
     *
     * @param to         邮件收件人
     * @param subject    邮件主题
     * @param verifyCode 邮件验证码
     */
    void sendMail(String receive, String subject, String verifyCode);
}

MailService实现类

package com.zq.email.service.iml;
import com.zq.email.service.MailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.stereotype.Service;
@Service

public class MailServiceIml implements MailService {
@Autowired
private JavaMailSender sender;

@Value("${mail.fromMail.addr}")
private String from;


/**
 * @param receive    邮件收件人
 * @param subject    邮件主题
 * @param verifyCode 邮件验证码
 */
@Override
public void sendMail(String receive, String subject, String verifyCode){

    SimpleMailMessage message = new SimpleMailMessage();

    // 主题
    message.setSubject(subject);

    // 文本
    message.setText("暗号是：" + verifyCode);

    // 发件人
    message.setFrom(from);

    // 收件人
    message.setTo(receive);

    // 发送
    sender.send(message);
}

}

MailController

package com.zq.email.controller;
import com.zq.email.service.iml.MailServiceIml;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;
@RestController

@RequestMapping("/mail")

public class MailController {
@Autowired
private MailServiceIml mailSender;

@RequestMapping("/send")
public String mailSend() {
    mailSender.sendMail("ovo.sk@qq.com", "请回暗号", "5201314");
    return "发送成功";
}

}

测试方法一

效果图1

效果图2

测试方法二

启动项目：访问 http://localhost:8080/mail/send

效果图1

效果图2

源码地址：https://gitee.com/kk-dad/email/tree/main