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backend/src/main/java/com/example/cattletends/exception/GlobalExceptionHandler.java

@@ -0,0 +1,70 @@
+package com.example.cattletends.exception;
+
+import com.example.cattletends.common.Result;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.HttpStatus;
+import org.springframework.validation.FieldError;
+import org.springframework.web.bind.MethodArgumentNotValidException;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 全局异常处理器
+ */
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);
+
+    /**
+     * 处理参数校验异常
+     */
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    public Result<Map<String, String>> handleValidationExceptions(MethodArgumentNotValidException ex) {
+        Map<String, String> errors = new HashMap<>();
+        ex.getBindingResult().getAllErrors().forEach((error) -> {
+            String fieldName = ((FieldError) error).getField();
+            String errorMessage = error.getDefaultMessage();
+            errors.put(fieldName, errorMessage);
+        });
+        logger.warn("参数校验失败: {}", errors);
+        return Result.error(400, "参数校验失败", errors);
+    }
+
+    /**
+     * 处理业务异常
+     */
+    @ExceptionHandler(RuntimeException.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    public Result<Void> handleRuntimeException(RuntimeException ex) {
+        logger.error("业务异常: {}", ex.getMessage(), ex);
+        return Result.error(400, ex.getMessage());
+    }
+
+    /**
+     * 处理非法参数异常
+     */
+    @ExceptionHandler(IllegalArgumentException.class)
+    @ResponseStatus(HttpStatus.BAD_REQUEST)
+    public Result<Void> handleIllegalArgumentException(IllegalArgumentException ex) {
+        logger.warn("非法参数: {}", ex.getMessage());
+        return Result.error(400, ex.getMessage());
+    }
+
+    /**
+     * 处理所有其他异常
+     */
+    @ExceptionHandler(Exception.class)
+    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+    public Result<Void> handleException(Exception ex) {
+        logger.error("系统异常: {}", ex.getMessage(), ex);
+        return Result.error(500, "系统内部错误，请联系管理员");
+    }
+}
+