SpringBoot邮件发送（QQ邮箱）

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

# 发件人QQ号
spring.mail.username=2508575653@qq.com
# QQ邮箱授权码
spring.mail.password=xxxxxxxxxxxxxxx
# 主机
spring.mail.host=smtp.qq.com
# qq邮箱需要开启安全连接
spring.mail.properties.mail.stmp.ssl.enable=true

package com.peng;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;
@SpringBootTest
class SpringbootSecurityApplicationTests {
    @Autowired
    private JavaMailSenderImpl javaMailSender;
    @Test
    void contextLoads() {
        //简单邮件
        SimpleMailMessage message = new SimpleMailMessage();
        message.setSubject("灵异事件");//主题
        message.setText("九十岁老太为何起死回生，数百头母猪为何半夜惨叫。女生宿舍为何频频失窃，超市方便面为何惨遭黑手。在达一切的背后，是人性的扭曲、还是道德的沦丧。敬请观注鹏哥解说！！");
        message.setTo("2508575653@qq.com");
        message.setFrom("2508575653@qq.com");
        javaMailSender.send(message);
    }
    @Test
    void test() throws MessagingException {
        //复杂邮件
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true);//组装，开启之后可以添加附件
        helper.setSubject("ok");//主题
        helper.setText("九十岁老太为何起死回生，数百头母猪为何半夜惨叫。女生宿舍为何频频失窃，超市方便面为何惨遭黑手。在达一切的背后，是人性的扭曲、还是道德的沦丧。敬请观注鹏哥解说！！");
        helper.addAttachment("按什么名称发送.后缀",new File("文件路径"));
        helper.setTo("收件人");
        helper.setFrom("发件人");
        javaMailSender.send(mimeMessage);
    }
}