基于SSM框架的汽车在线销售系统设计与实现

**基于SSM框架的汽车在线销售系统设计与实现**

**1. 系统概述**

本系统是基于SSM（Spring + Spring MVC + MyBatis）框架设计的汽车在线销售系统。该系统主要功能包括用户注册、登录、汽车信息管理、订单管理等。

**2. 系统结构**

系统结构如下：

* **Controller**:负责处理用户请求和返回响应结果* **Service**:负责业务逻辑的实现* **DAO**:负责与数据库交互* **Model**:负责定义数据模型**3. Controller层设计**

###3.1 UserController.java

java/**
 * @author [Your Name]
 */
@RestController@RequestMapping("/user")
public class UserController {
 @Autowired private UserService userService;
 /**
 * 用户注册 * * @param user * @return */
 @PostMapping("/register")
 public Result register(@RequestBody User user) {
 return userService.register(user);
 }
 /**
 * 用户登录 * * @param user * @return */
 @PostMapping("/login")
 public Result login(@RequestBody User user) {
 return userService.login(user);
 }
}

java/**
 * @author [Your Name]
 */
@RestController@RequestMapping("/order")
public class OrderController {
 @Autowired private OrderService orderService;
 /**
 * 创建订单 * * @param order * @return */
 @PostMapping("/create")
 public Result createOrder(@RequestBody Order order) {
 return orderService.createOrder(order);
 }
}

java/**
 * @author [Your Name]
 */
@Servicepublic class UserService {
 @Autowired private UserDAO userDAO;
 /**
 * 用户注册 * * @param user * @return */
 public Result register(User user) {
 //业务逻辑实现 return Result.success();
 }
 /**
 * 用户登录 * * @param user * @return */
 public Result login(User user) {
 //业务逻辑实现 return Result.success();
 }
}

java/**
 * @author [Your Name]
 */
@Servicepublic class OrderService {
 @Autowired private OrderDAO orderDAO;
 /**
 * 创建订单 * * @param order * @return */
 public Result createOrder(Order order) {
 //业务逻辑实现 return Result.success();
 }
}

java/**
 * @author [Your Name]
 */
@Repositorypublic class UserDAO {
 @Autowired private SessionFactory sessionFactory;
 /**
 * 根据用户名查找用户 * * @param username * @return */
 public User findByUsername(String username) {
 //业务逻辑实现 return null;
 }
}

java/**
 * @author [Your Name]
 */
@Repositorypublic class OrderDAO {
 @Autowired private SessionFactory sessionFactory;
 /**
 * 根据订单号查找订单 * * @param orderNo * @return */
 public Order findByOrderNo(String orderNo) {
 //业务逻辑实现 return null;
 }
}

java/**
 * @author [Your Name]
 */
@Entitypublic class User {
 @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
 private Long id;
 private String username;
 private String password;
 // getter和setter方法}

java/**
 * @author [Your Name]
 */
@Entitypublic class Order {
 @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
 private Long id;
 private String orderNo;
 private Date createTime;
 // getter和setter方法}