在数据库中使用javstvalidate和phpmailer

import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class EmailValidator {
    private static final String EMAIL_REGEX = "^[A-Za-z0-9+_.-]+@[A-Za-z0-9.-]+$";

    public static boolean isValidEmail(String email) {
        Pattern pattern = Pattern.compile(EMAIL_REGEX);
        Matcher matcher = pattern.matcher(email);
        return matcher.matches();
    }

    public static void main(String[] args) {
        String email = "example@example.com";
        System.out.println(isValidEmail(email)); // 输出: true
    }
}

<?php
require 'vendor/autoload.php';

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

$mail = new PHPMailer(true);

try {
    // 服务器设置
    $mail->SMTPDebug = 2;                      // 开启 SMTP 调试
    $mail->isSMTP();                                            // 发送邮件使用 SMTP
    $mail->Host       = 'smtp.example.com';                     // SMTP 服务器地址
    $mail->SMTPAuth   = true;                                   // 启用 SMTP 验证
    $mail->Username   = 'your_email@example.com';               // SMTP 用户名
    $mail->Password   = 'your_password';                        // SMTP 密码
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;         // 启用 TLS 加密
    $mail->Port       = 587;                                    // SMTP 端口

    // 发件人
    $mail->setFrom('from@example.com', 'Mailer');

    // 收件人
    $mail->addAddress('recipient@example.com', 'Joe User');     // 添加一个收件人

    // 邮件内容
    $mail->isHTML(true);                                  // 设置邮件格式为 HTML
    $mail->Subject = 'Here is the subject';
    $mail->Body    = 'This is the HTML message body <b>in bold!</b>';
    $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
?>