feat: 模版方法模式实现消息发送器

pom.xml

@@ -185,6 +185,12 @@
             <version>${springdoc-openapi.version}</version>
         </dependency>
 
+        <!-- 邮件 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-mail</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>com.mysql</groupId>
             <artifactId>mysql-connector-j</artifactId>