引入依赖：
<!-- JavaMail API -->
<dependency><groupId>javax.mail</groupId><artifactId>javax.mail-api</artifactId><version>1.6.2</version>
</dependency>
<!-- JavaMail实现 -->
<dependency><groupId>com.sun.mail</groupId><artifactId>javax.mail</artifactId><version>1.6.2</version>
</dependency>
工具类：
package com.woniu.controller;import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;public class QQMailSender {// QQ邮箱SMTP服务器地址private static final String SMTP_HOST = "smtp.qq.com";// 端口号，SSL加密方式为465private static final String SMTP_PORT = "465";private String senderEmail; // 发送者邮箱地址private String authCode; // QQ邮箱授权码（不是登录密码）/*** 构造方法* @param senderEmail 发送者QQ邮箱* @param authCode 邮箱授权码*/public QQMailSender(String senderEmail, String authCode) {this.senderEmail = senderEmail;this.authCode = authCode;}/*** 发送邮件* @param receiver 收件人邮箱* @param subject 邮件主题* @param content 邮件内容* @return 发送成功返回true，否则返回false*/public boolean sendMail(String receiver, String subject, String content) {// 1. 配置邮件服务器属性Properties props = new Properties();props.put("mail.smtp.host", SMTP_HOST); // SMTP服务器地址props.put("mail.smtp.port", SMTP_PORT); // 端口号props.put("mail.smtp.auth", "true"); // 需要身份验证props.put("mail.smtp.ssl.enable", "true"); // 启用SSL加密props.put("mail.transport.protocol", "smtp"); // 协议类型// 2. 创建会话对象，设置身份验证Session session = Session.getInstance(props, new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication(senderEmail, authCode);}});session.setDebug(false); // 调试模式，true会输出详细发送日志try {// 3. 创建邮件消息MimeMessage message = new MimeMessage(session);// 设置发件人message.setFrom(new InternetAddress(senderEmail));// 设置收件人message.setRecipient(Message.RecipientType.TO, new InternetAddress(receiver));// 设置邮件主题message.setSubject(subject, "UTF-8"); // 解决中文乱码// 设置邮件内容message.setText(content, "UTF-8"); // 解决中文乱码// 4. 发送邮件Transport.send(message);System.out.println("邮件发送成功！");return true;} catch (MessagingException e) {System.err.println("邮件发送失败：" + e.getMessage());e.printStackTrace();return false;}}/*** 测试方法*/public static void main(String[] args) {// 替换为你的QQ邮箱和授权码String senderEmail = "your_qq@qq.com";String authCode = "your_auth_code";// 创建发送者实例QQMailSender mailSender = new QQMailSender(senderEmail, authCode);// 发送测试邮件boolean result = mailSender.sendMail("recipient@example.com", // 收件人邮箱"这是一封测试邮件", // 邮件主题"你好，这是通过Java程序发送的QQ邮件测试！" // 邮件内容);if (result) {System.out.println("测试邮件发送成功");} else {System.out.println("测试邮件发送失败");}}
}封装之后的代码：
前提:qq授权码已经在本地环境变量配置好了，使用的是spingboot项目
yaml配置：
spring:mail:# QQ邮箱SMTP服务器地址host: smtp.qq.com# SMTP服务器端口（SSL加密方式）port: 465# 发送者QQ邮箱账号（替换为你的QQ邮箱）username: your_qq@qq.com# QQ邮箱授权码（不是登录密码，需要在QQ邮箱设置中获取）password: ${QQ_SMTP_PASSWORD}
配置类：
package com.woniu.controller;import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;@Component // 加入Spring容器管理
public class QQEmailSender {// QQ邮箱SMTP服务器地址private static final String SMTP_HOST = "smtp.qq.com";// SMTP端口，QQ邮箱为465private static final String SMTP_PORT = "465";@Value("${spring.mail.username}") // 从配置文件获取用户名private String username; // 发件人邮箱@Value("${spring.mail.password}")private String password; // 发件人邮箱授权码// 移除自定义构造方法，使用默认构造方法让Spring可以实例化public QQEmailSender () {}/*** 发送邮件** @param to 收件人邮箱* @param subject 邮件主题* @param content 邮件内容* @return 是否发送成功*/public boolean sendEmail (String to, String subject, String content) {// 配置邮件服务器属性Properties props = new Properties();props.put("mail.smtp.host", SMTP_HOST);props.put("mail.smtp.port", SMTP_PORT);props.put("mail.smtp.auth", "true");props.put("mail.smtp.ssl.enable", "true"); // 启用SSL加密props.put("mail.transport.protocol", "smtp");// 创建会话Session session = Session.getInstance(props, new Authenticator() {@Overrideprotected PasswordAuthentication getPasswordAuthentication () {// 此处的username和password必须是非空的return new PasswordAuthentication(username, password);}});try {// 创建邮件消息Message message = new MimeMessage(session);message.setFrom(new InternetAddress(username));message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));message.setSubject(subject);message.setText(content);// 发送邮件Transport.send(message);System.out.println("邮件发送成功!!!");return true;} catch (MessagingException e) {System.err.println("邮件发送失败: " + e.getMessage());e.printStackTrace();return false;}}
}
测试：
package com.woniu.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;/*** @Author: 王思莹* @Description:* @DateTime: 2025/11/11 9:46* @Component: 成都蜗牛学苑*/// 项目启动时自动执行测试
@Component
public class EmailTest implements CommandLineRunner {@Autowiredprivate QQEmailSender qqEmailSender; // 从Spring容器注入@Overridepublic void run(String... args) throws Exception {// 发送测试邮件qqEmailSender.sendEmail("to_qq@qq.com", // 收件人邮箱"测试邮件", // 主题"这是一封通过Java程序发送的测试邮件！" // 内容);}
}