Java基于JavaMail实现用QQ邮箱发送邮件

引入Maven依赖

<!-- email邮件 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
    <version>2.1.1.RELEASE</version>
</dependency>

开启POP3/SMTP服务

位置：QQ邮箱首页->设置->账户，然后会得到一个授权码

application.yml文件配置

*****处根据自己的实际情况填写

spring:
  # QQ邮箱发送配置
  mail:
    # host不配置会注入失败
    host: smtp.qq.com
    #自己的邮箱
    username: ****@qq.com
    #授权码
    password: ****
    default-encoding: utf-8
    protocol: smtp
    properties:
      mail:
        smtp:
          connectiontimeout: 5000
          timeout: 3000
          writetimeout: 5000
          ssl:
            enable: true #一定要开启ssl,不然会503 验证失败的（开启加密验证）

Java代码

package com.ledao.controller;

import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.annotation.Resource;

/**
 * @author LeDao
 * @company
 * @create 2021-07-16 9:08
 */
@Controller
public class MyController {

    @Resource
    private JavaMailSender javaMailSender;

    /**
     * 首页
     *
     * @return
     */
    @ResponseBody
    @RequestMapping("/")
    public String root() {
        return "<h1 style='text-align: center'><a href='/sendMail'>点我发送邮件</a></h1>";
    }

    /**
     * 发送邮件测试
     *
     * @return
     */
    @ResponseBody
    @RequestMapping("/sendMail")
    public String sendMail() {
        SimpleMailMessage message = new SimpleMailMessage();
        //发件人QQ邮箱
        message.setFrom("******@qq.com");
        //收件人QQ邮箱
        message.setTo("******@qq.com");
        //主题
        message.setSubject("发送邮件测试");
        //内容
        message.setText("111");
        //发送邮件
        javaMailSender.send(message);
        return "<h2 style='color:red;text-align: center'>发送成功,请到收件人邮箱查收!!</h2>";
    }
}