first commit

backend/src/main/java/com/xuezhanmaster/common/api/GlobalExceptionHandler.java

@@ -0,0 +1,20 @@
+package com.xuezhanmaster.common.api;
+
+import com.xuezhanmaster.common.exception.BusinessException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(BusinessException.class)
+    public ApiResponse<Void> handleBusinessException(BusinessException exception) {
+        return ApiResponse.failure(exception.getCode(), exception.getMessage());
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ApiResponse<Void> handleGenericException(Exception exception) {
+        return ApiResponse.failure("INTERNAL_ERROR", exception.getMessage());
+    }
+}
+