导出优化，上传端代码

app/core/exceptions.py

@@ -0,0 +1,59 @@
+"""
+自定义业务异常类
+用于区分业务逻辑错误和系统错误
+"""
+
+from .response_code import ResponseCode, ResponseMessage
+
+
+class BusinessException(Exception):
+    """业务异常基类"""
+    def __init__(self, message: str, code: int = None):
+        self.message = message
+        self.code = code or ResponseCode.INTERNAL_ERROR
+        super().__init__(self.message)
+
+
+class DataNotFoundException(BusinessException):
+    """数据不存在异常"""
+    def __init__(self, message: str = None):
+        super().__init__(
+            message or ResponseMessage.DATA_NOT_FOUND,
+            ResponseCode.DATA_NOT_FOUND
+        )
+
+
+class AccountNotFoundException(BusinessException):
+    """账号不存在异常"""
+    def __init__(self, message: str = None):
+        super().__init__(
+            message or ResponseMessage.ACCOUNT_NOT_FOUND,
+            ResponseCode.ACCOUNT_NOT_FOUND
+        )
+
+
+class DataExistsException(BusinessException):
+    """数据已存在异常"""
+    def __init__(self, message: str = None):
+        super().__init__(
+            message or ResponseMessage.DATA_EXISTS,
+            ResponseCode.DATA_EXISTS
+        )
+
+
+class ValidationException(BusinessException):
+    """数据验证异常"""
+    def __init__(self, message: str = None):
+        super().__init__(
+            message or ResponseMessage.BAD_REQUEST,
+            ResponseCode.VALIDATION_ERROR
+        )
+
+
+class ExportException(BusinessException):
+    """导出异常"""
+    def __init__(self, message: str = None):
+        super().__init__(
+            message or ResponseMessage.EXPORT_FAILED,
+            ResponseCode.EXPORT_FAILED
+        )