QQ邮箱发送验证码功能的实现

1.打开QQ邮箱的xxx服务，记住授权码

2.引入依赖

            org.springframework.boot
            spring-boot-starter-mail
       

3.application.properties中配置
#mail
spring.mail.host=smtp.qq.com
spring.mail.username=2813573389@qq.com
spring.mail.password=xxxxx        //这个不是密码，是QQ邮箱授权码
spring.mail.protocol=smtp
spring.mail.properties.mail.smtp.auth=true
spring.mail.port=465
spring.mail.properties.mail.display.sendmail: Javen
spring.mail.properties.mail.display.sendname: ChairC's blog official
spring.mail.properties.mail.smtp.ssl.enable: true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

4.代码
package com.zhaoguo.testlogin.util;

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.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import javax.servlet.http.HttpSession;
import java.util.Random;

@Service
public class MyEMail {

    @Value("${spring.mail.username}")
    private String from;

    @Autowired
    private JavaMailSender javaMailSender;

   
    public void sendMail(String email, HttpSession session) {

        MimeMessage mimeMessage = javaMailSender.createMimeMessage();

        try {
            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
//            设置发件人
            mimeMessageHelper.setFrom(from);
//            设置收件人
            mimeMessageHelper.setTo(email);
//            设置邮件主题
            mimeMessageHelper.setSubject("来不及许愿的星雨测试用户邮箱注册激活");
            //生成随机数
            String random = randomInteger();
            //将随机数放置到session中
            session.setAttribute("code",random);
            System.out.println(random);

//            设置验证码的样式
            mimeMessageHelper.setText("激活验证码为：" + random);

            javaMailSender.send(mimeMessage);
        } catch (MessagingException e) {
            e.printStackTrace();
        }

    }

    public void sendMail1(String email, HttpSession session){
        SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
        simpleMailMessage.setFrom(from);
        simpleMailMessage.setTo(email);

        //生成随机数
        String random = randomInteger();
        //  将验证信息存入session
        session.setAttribute("code",random);
        //  自动信息发送
        String mailSubject = "来不及许愿的星雨测试用户邮箱注册激活";
        String mailContent = "激活验证码为：" + random;

        simpleMailMessage.setSubject(mailSubject);
        simpleMailMessage.setText(mailContent);
        javaMailSender.send(simpleMailMessage);
    }
   
    private String randomInteger() {
        Random random = new Random();
        StringBuffer stringBuffer = new StringBuffer();
        //生成6位的随机数
        for (int i = 0;i<6;i++){
            int i1 = random.nextInt(10);
            stringBuffer.append(i1);
        }
        return stringBuffer.toString();
    }

}

5.注意：如果一个类中有自动注入的内容，那么在另一个类中是不可以实例化第一个类的，只能注入第一个类。