完成新需求

backend-java/src/main/java/com/nanri/aiimage/common/api/ApiResponse.java

@@ -0,0 +1,34 @@
+package com.nanri.aiimage.common.api;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Schema(description = "统一响应体")
+public class ApiResponse<T> {
+
+    @Schema(description = "是否成功")
+    private boolean success;
+
+    @Schema(description = "提示信息")
+    private String message;
+
+    @Schema(description = "响应数据")
+    private T data;
+
+    public static <T> ApiResponse<T> success(T data) {
+        return new ApiResponse<>(true, "操作成功", data);
+    }
+
+    public static <T> ApiResponse<T> success(String message, T data) {
+        return new ApiResponse<>(true, message, data);
+    }
+
+    public static <T> ApiResponse<T> fail(String message) {
+        return new ApiResponse<>(false, message, null);
+    }
+}

backend-java/src/main/java/com/nanri/aiimage/common/exception/BusinessException.java

@@ -0,0 +1,8 @@
+package com.nanri.aiimage.common.exception;
+
+public class BusinessException extends RuntimeException {
+
+    public BusinessException(String message) {
+        super(message);
+    }
+}

backend-java/src/main/java/com/nanri/aiimage/common/exception/GlobalExceptionHandler.java

@@ -0,0 +1,37 @@
+package com.nanri.aiimage.common.exception;
+
+import com.nanri.aiimage.common.api.ApiResponse;
+import jakarta.validation.ConstraintViolationException;
+import lombok.extern.slf4j.Slf4j;
+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(BusinessException.class)
+    public ApiResponse<Void> handleBusinessException(BusinessException ex) {
+        return ApiResponse.fail(ex.getMessage());
+    }
+
+    @ExceptionHandler(MethodArgumentNotValidException.class)
+    public ApiResponse<Void> handleMethodArgumentNotValidException(MethodArgumentNotValidException ex) {
+        String message = ex.getBindingResult().getFieldError() != null
+                ? ex.getBindingResult().getFieldError().getDefaultMessage()
+                : "参数校验失败";
+        return ApiResponse.fail(message);
+    }
+
+    @ExceptionHandler(ConstraintViolationException.class)
+    public ApiResponse<Void> handleConstraintViolationException(ConstraintViolationException ex) {
+        return ApiResponse.fail(ex.getMessage());
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ApiResponse<Void> handleException(Exception ex) {
+        log.error("Unhandled exception", ex);
+        return ApiResponse.fail("服务异常：" + ex.getMessage());
+    }
+}