Week 1-8: Spring Boot 学习计划完整项目

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

week5/src/main/java/com/learn/exception/GlobalExceptionHandler.java

@@ -0,0 +1,43 @@
+package com.learn.exception;
+
+import com.learn.dto.ApiResponse;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+import java.util.stream.Collectors;
+
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
+
+    /** 参数校验失败 */
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ResponseEntity<ApiResponse<?>> handleValidation(MethodArgumentNotValidException ex) {
+        String detail = ex.getBindingResult().getFieldErrors().stream()
+                .map(e -> e.getField() + ": " + e.getDefaultMessage())
+                .collect(Collectors.joining("; "));
+        return ResponseEntity.badRequest().body(ApiResponse.badRequest("参数校验失败: " + detail));
+    }
+
+    /** 权限不足（第 3 天） */
+    @ExceptionHandler(AccessDeniedException.class)
+    public ResponseEntity<ApiResponse<?>> handleAccessDenied(AccessDeniedException ex) {
+        return ResponseEntity.status(HttpStatus.FORBIDDEN)
+                .body(ApiResponse.error(403, "权限不足: 只有 ADMIN 可以执行此操作"));
+    }
+
+    /** 兜底 */
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<ApiResponse<?>> handleAll(Exception ex) {
+        log.error("未处理异常", ex);
+        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
+                .body(ApiResponse.error(500, "服务器错误: " + ex.getMessage()));
+    }
+}