SpringBoot 轻松实现发送邮箱验证码+Redis缓存（附带HTML模板）

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
 
import javax.mail.internet.MimeMessage;
import java.util.concurrent.TimeUnit;
 
@Service
public class EmailService {
 
    @Autowired
    private JavaMailSender mailSender;
 
    @Autowired
    private TemplateEngine templateEngine;
 
    @Autowired
    private StringRedisTemplate redisTemplate;
 
    public void sendEmail(String to, String subject, String templateName, Context context) {
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        try {
            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
            helper.setTo(to);
            helper.setSubject(subject);
            String htmlContent = templateEngine.process(templateName, context);
            helper.setText(htmlContent, true);
            mailSender.send(mimeMessage);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 
    public void sendEmailWithCode(String to, String code) {
        Context context = new Context();
        context.setVariable("code", code);
        sendEmail(to, "Your Verification Code", "email/emailTemplate", context);
    }
 
    public void saveCodeToRedis(String key, String code, long timeout, TimeUnit unit) {
        ValueOperations<String, String> opsForValue = redisTemplate.opsForValue();
        opsForValue.set(key, code, timeout, unit);
    }
 
    public String getCodeFromRedis(String key) {
        ValueOperations<String, String> opsForValue = redisTemplate.opsForValue();
        return opsForValue.get(key);
    }
}

这段代码示例展示了如何在SpringBoot应用中使用JavaMailSender发送邮件，TemplateEngine处理HTML模板，以及StringRedisTemplate进行缓存操作。sendEmailWithCode方法接收接收者邮箱地址和验证码，并使用Thymeleaf模板引擎发送带有验证码的邮件。同时，提供了saveCodeToRedis和getCodeFromRedis方法来操作Redis缓存。