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src/main/java/com/aida/buyer/common/exception/GlobalExceptionHandler.java

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+package com.aida.buyer.common.exception;
+
+import com.aida.buyer.common.result.Response;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.validation.BindException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@Slf4j
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(UnauthorizedException.class)
+    public ResponseEntity<Response<Void>> handleUnauthorizedException(UnauthorizedException e) {
+        log.error("Unauthorized: {}", e.getMessage());
+        return new ResponseEntity<>(
+                Response.fail(401, e.getMessage()),
+                HttpStatus.UNAUTHORIZED
+        );
+    }
+
+    @ExceptionHandler(BusinessException.class)
+    public Response<Void> handleBusinessException(BusinessException e) {
+        return Response.fail(e.getCode(), e.getMsg());
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public Response<Void> handleValidationException(MethodArgumentNotValidException e) {
+        String message = e.getBindingResult().getFieldErrors().stream()
+                .map(error -> error.getField() + ": " + error.getDefaultMessage())
+                .findFirst()
+                .orElse("validation error");
+        return Response.fail(-2, message);
+    }
+
+    @ExceptionHandler(BindException.class)
+    public Response<Void> handleBindException(BindException e) {
+        String message = e.getBindingResult().getFieldErrors().stream()
+                .map(error -> error.getField() + ": " + error.getDefaultMessage())
+                .findFirst()
+                .orElse("bind error");
+        return Response.fail(-2, message);
+    }
+
+    @ExceptionHandler(Exception.class)
+    public Response<Void> handleException(Exception e) {
+        log.error("system error: ", e);
+        return Response.error("系统繁忙");
+    }
+}