refactor: update Mysql connection parameters

src/main/resources/application.properties

@@ -2,7 +2,7 @@
 server.port=8443
 
 # 数据源配置
-spring.datasource.url=jdbc:mysql://127.0.0.1:3306/wj?characterEncoding=UTF-8&serverTimezone=GMT%2B8
+spring.datasource.url=jdbc:mysql://localhost:3306/wj?characterEncoding=UTF-8&serverTimezone=GMT%2B8
 spring.datasource.username=root
 spring.datasource.password=Admin123!
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver