Initial commit: Car Maintenance Management System

Author: Yang Lu

School: Liaoning Institute of Science and Technology

Major: Computer Science and Technology

Class: BZ246

Tech Stack:

- Backend: Spring Boot 2.7.18 + JPA + MySQL

- Frontend: HTML5 + CSS3 + JavaScript

Features:

- User Management (Admin/Staff/Customer roles)

- Vehicle Archive Management

- Service Order Management

- Parts Inventory Management

- Online Appointment Service

- Data Statistics and Analysis

Generated with Claude Code

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/src/main/java/com/carmaintenance/dto/Result.java

@@ -0,0 +1,54 @@
+package com.carmaintenance.dto;
+
+import lombok.Data;
+
+/**
+ * 统一API响应结果
+ */
+@Data
+public class Result<T> {
+
+    private Integer code;
+    private String message;
+    private T data;
+
+    private Result() {}
+
+    private Result(Integer code, String message, T data) {
+        this.code = code;
+        this.message = message;
+        this.data = data;
+    }
+
+    public static <T> Result<T> success() {
+        return new Result<>(200, "操作成功", null);
+    }
+
+    public static <T> Result<T> success(T data) {
+        return new Result<>(200, "操作成功", data);
+    }
+
+    public static <T> Result<T> success(String message, T data) {
+        return new Result<>(200, message, data);
+    }
+
+    public static <T> Result<T> error(String message) {
+        return new Result<>(500, message, null);
+    }
+
+    public static <T> Result<T> error(Integer code, String message) {
+        return new Result<>(code, message, null);
+    }
+
+    public static <T> Result<T> unauthorized(String message) {
+        return new Result<>(401, message, null);
+    }
+
+    public static <T> Result<T> forbidden(String message) {
+        return new Result<>(403, message, null);
+    }
+
+    public static <T> Result<T> notFound(String message) {
+        return new Result<>(404, message, null);
+    }
+}