手把手教你——JAVA集成QQ邮箱，实现发送QQ邮件

一、获取QQ邮箱授权码

获取验证码，开启服务

保存授权码

二、编写程序

1.引入依赖

<!-- 邮箱依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
    <version>3.0.0</version>
</dependency>

2.在application.properties添加配置

# ===========邮箱相关=========
spring.mail.host=smtp.qq.com
spring.mail.username= 123@qq.com
spring.mail.password= QQ邮箱申请的授权码
spring.mail.port=587
spring.mail.default-encoding=UTF-8
spring.mail.properties.mail.smtp.socketFactoryClass=javax.net.ssl.SSLSocketFactory
spring.mail.properties.mail.debug=true

或者application.yml中添加配置

spring:
#  ===========邮箱相关=========
  mail:
    host: smtp.qq.com
    username: 123@qq.com
    password: QQ邮箱申请的授权码
    port: 587
    default-encoding: UTF-8
    properties:
      mail:
        smtp:
          socketFactoryClass: javax.net.ssl.SSLSocketFactory
        debug: true

3.编写代码

package com.tledu.email;

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
 
public class QQMailSender {
 
    public static void sendEmail(String recipient, String subject, String content) throws MessagingException {
        final String username = "123@qq.com"; // 例如: example@qq.com
        final String password = "授权码"; // 这里是QQ邮箱的授权码，不是密码
 
        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.qq.com"); // QQ邮箱的SMTP服务器地址
        props.put("mail.smtp.auth", "true"); // 启用SMTP认证
        props.put("mail.smtp.port", "587"); // QQ邮箱的SMTP端口
        props.put("mail.smtp.starttls.enable", "true"); // 启用TLS
 
        // 创建邮件会话
        Session session = Session.getInstance(props, null);
 
        // 创建邮件
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("from@no-spam.com")); // 设置发件人
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipient)); // 设置收件人
        message.setSubject(subject); // 设置邮件主题
        message.setText(content); // 设置邮件内容
 
        // 发送邮件
        Transport transport = session.getTransport("smtp");
        transport.connect(username, password);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();
    }
 
    public static void main(String[] args) {
        try {
            sendEmail("3124616480@qq.com", "Test Subject", "This is the email content"); // 收件人邮箱，邮件主题， 邮件正文
            System.out.println("Email sent successfully");
        } catch (MessagingException e) {
            e.printStackTrace();
            System.out.println("Error sending email");
        }
    }
}