feat: 接入mysql数据库

utils/common.py

@@ -0,0 +1,13 @@
+import re
+
+
+def camel_to_snake(name: str) -> str:
+    """将驼峰命名转换为蛇形命名（CamelCase → snake_case）"""
+    name = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name)
+    return re.sub('([a-z0-9])([A-Z])', r'\1_\2', name).lower()
+
+
+def snake_to_camel(name: str) -> str:
+    """将蛇形命名转换为驼峰命名（snake_case → CamelCase）"""
+    components = name.split('_')
+    return ''.join(x.title() for x in components)