✨Feat: 增加发送邮件功能

backend/src/main/java/cn/hezhaohui/mail/SendMailApplication.java

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+package cn.hezhaohui.mail;
+
+import cn.hezhaohui.mail.service.MailService;
+import jakarta.annotation.Resource;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SendMailApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SendMailApplication.class, args);
+    }
+}

backend/src/main/java/cn/hezhaohui/mail/config/MailConfig.java

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+package cn.hezhaohui.mail.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.JavaMailSenderImpl;
+
+import java.util.Properties;
+
+@Configuration
+public class MailConfig {
+
+    @Bean
+    public JavaMailSender getJavaMailSender() {
+        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
+        mailSender.setHost("smtp.163.com");
+        mailSender.setPort(465);
+
+        mailSender.setUsername("hezhaohui0807@163.com");
+        mailSender.setPassword("AMaauzQZQMnkSfZi");
+
+        Properties properties = mailSender.getJavaMailProperties();
+        properties.put("mail.transport.protocol", "smtp");
+        properties.put("mail.smtp.auth", "true");
+        properties.put("mail.smtp.ssl.enable", "true");
+        properties.put("mail.smtp.starttls.enable", "true");
+        properties.put("mail.debug", "true");
+
+        return mailSender;
+    }
+}

backend/src/main/java/cn/hezhaohui/mail/service/MailService.java

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+package cn.hezhaohui.mail.service;
+
+import jakarta.annotation.Resource;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.stereotype.Service;
+
+@Service
+public class MailService {
+
+    @Resource
+    private JavaMailSender emailSender;
+
+    public void sendMessage(String to, String subject, String text) {
+        SimpleMailMessage message = new SimpleMailMessage();
+        message.setFrom("hezhaohui0807@163.com");
+        message.setTo(to);
+        message.setSubject(subject);
+        message.setText(text);
+        emailSender.send(message);
+    }
+}