From d5dada686bace75e62ee7221ae221e5fc9c6f117 Mon Sep 17 00:00:00 2001
From: Geonhee Min <baekyangdan@gmail.com>
Date: Mon, 3 Nov 2025 00:10:10 +0000
Subject: [PATCH] =?UTF-8?q?=EC=83=88=20=ED=8C=8C=EC=9D=BC=20=EC=B6=94?=
 =?UTF-8?q?=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 MailService.java | 57 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 MailService.java

diff --git a/MailService.java b/MailService.java
new file mode 100644
index 0000000..ab60058
--- /dev/null
+++ b/MailService.java
@@ -0,0 +1,57 @@
+package com.baekyangdan.scheduler.service;
+
+import java.util.Properties;
+
+import org.springframework.stereotype.Service;
+
+import com.google.auth.oauth2.AccessToken;
+import com.google.auth.oauth2.UserCredentials;
+
+import jakarta.mail.Message;
+import jakarta.mail.Session;
+import jakarta.mail.Transport;
+import jakarta.mail.internet.InternetAddress;
+import jakarta.mail.internet.MimeMessage;
+
+@Service
+public class MailService {
+    
+    private static final String CLIENT_ID="688417162908-iqvnj4ceb8t1dkbjr70dtcafo27m8kqe.apps.googleusercontent.com";
+    private static final String CLIENT_SECRET="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";
+    private static final String REFRESH_TOKEN="1//04_pSivNoGpPUCgYIARAAGAQSNwF-L9IrO0Kx6jSzq_eQNjdl65f0O2iqKSNpFeZ3gtIGMhOk0oiZsnKrPfWs8jvuEic1NhUoZ0g";
+    private static final String USER_MAIL="baekyangdan@gmail.com";
+
+    public void sendTestMail() throws Exception {
+        UserCredentials credentials = 
+        UserCredentials.newBuilder()
+            .setClientId(CLIENT_ID)
+            .setClientSecret(CLIENT_SECRET)
+            .setRefreshToken(REFRESH_TOKEN)
+            .build();
+
+        AccessToken accessToken = credentials.refreshAccessToken();
+        
+        Properties props = new Properties();
+        props.put("mail.smtp.auth", "true");
+        props.put("mail.smtp.starttls.enable", "true");
+        props.put("mail.smtp.host", "smtp.gmail.com");
+        props.put("mail.smtp.port", "587");
+        props.put("mail.smtp.auth.mechanisms", "XOAUTH2");
+
+        Session session = Session.getInstance(props);
+        Transport transport = session.getTransport("smtp");
+
+        transport.connect("smtp.gmail.com", USER_MAIL, accessToken.getTokenValue());
+
+        Message message = new MimeMessage(session);
+        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("lapinuit966@gmail.com"));
+        message.setSubject("test Mail");
+        message.setText("test mail");
+        message.setFrom(new InternetAddress(USER_MAIL));
+
+        transport.sendMessage(message, message.getAllRecipients());
+        transport.close();
+
+        System.out.println("메일 전송 완료");
+    }
+}