java购物网站开发,ukvps,云主机安全基线,海外vps是什么,日本vps推荐windows

🗣 Wd提问: java购物网站开发

🤖 Ai回答:
我来为您详细介绍Java购物网站的开发过程。

1、技术栈选择

后端技术
Spring Boot 快速开发框架
Spring MVC Web层框架
Spring Data JPA 数据持久化
Spring Security 安全认证
MySQL 关系型数据库
Redis 缓存和会话管理

前端技术
HTML/CSS/JavaScript
Bootstrap 响应式布局
Thymeleaf 模板引擎
jQuery JavaScript库

2、项目结构设计

shopping-website/
├── src/main/java/
│ └── com/example/shopping/
│ ├── controller/ 控制器层
│ ├── service/ 业务逻辑层
│ ├── repository/ 数据访问层
│ ├── entity/ 实体类
│ ├── dto/ 数据传输对象
│ ├── config/ 配置类
│ └── ShoppingApplication.java
├── src/main/resources/
│ ├── templates/ Thymeleaf模板
│ ├── static/ 静态资源
│ ├── application.yml 配置文件
│ └── data.sql 初始化数据
└── pom.xml Maven依赖配置

3、核心实体类设计

java
// 用户实体
@Entity
@Table(name = users)
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@Column(unique = true)
private String username;

private String password;
private String email;
private String phone;

@Enumerated(EnumType.STRING)
private UserRole role;

// 构造函数、getter、setter省略
}

// 商品实体
@Entity
@Table(name = products)
public class Product {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

private String name;
private String description;
private BigDecimal price;
private Integer stock;
private String imageUrl;

@ManyToOne
@JoinColumn(name = category_id)
private Category category;

private LocalDateTime createTime;

// 构造函数、getter、setter省略
}

// 订单实体
@Entity
@Table(name = orders)
public class Order {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@ManyToOne
@JoinColumn(name = user_id)
private User user;

private BigDecimal totalAmount;
private OrderStatus status;
private LocalDateTime createTime;

@OneToMany(mappedBy = order, cascade = CascadeType.ALL)
private List<OrderItem orderItems = new ArrayList<();

// 构造函数、getter、setter省略
}

4、Repository层（数据访问）

java
// 用户Repository
@Repository
public interface UserRepository extends JpaRepository<User, Long {
Optional<User findByUsername(String username);
Optional<User findByEmail(String email);
}

// 商品Repository
@Repository
public interface ProductRepository extends JpaRepository<Product, Long {
Page<Product findByCategory(Category category, Pageable pageable);
Page<Product findByNameContaining(String keyword, Pageable pageable);

@Query(SELECT p FROM Product p WHERE p.stock 0 ORDER BY p.createTime DESC)
Page<Product findAvailableProducts(Pageable pageable);
}

// 订单Repository
@Repository
public interface OrderRepository extends JpaRepository<Order, Long {
List<Order findByUserOrderByCreateTimeDesc(User user);
}

5、Service层（业务逻辑）

java
@Service
@Transactional
public class ProductService {

@Autowired
private ProductRepository productRepository;

public Page<Product getProducts(Pageable pageable) {
return productRepository.findAvailableProducts(pageable);
}

public Page<Product searchProducts(String keyword, Pageable pageable) {
return productRepository.findByNameContaining(keyword, pageable);
}

public Product getProductById(Long id) {
return productRepository.findById(id)
.orElseThrow(() - new ProductNotFoundException(商品不存在));
}

public void updateStock(Long productId, Integer quantity) {
Product product = getProductById(productId);
if (product.getStock() < quantity) {
throw new InsufficientStockException(库存不足);
}
product.setStock(product.getStock() quantity);
productRepository.save(product);
}
}

@Service
@Transactional
public class OrderService {

@Autowired
private OrderRepository orderRepository;

@Autowired
private ProductService productService;

public Order createOrder(User user, Map<Long, Integer cartItems) {
Order order = new Order();
order.setUser(user);
order.setStatus(OrderStatus.PENDING);
order.setCreateTime(LocalDateTime.now());

BigDecimal totalAmount = BigDecimal.ZERO;
List<OrderItem orderItems = new ArrayList<();

for (Map.Entry<Long, Integer entry : cartItems.entrySet()) {
Long productId = entry.getKey();
Integer quantity = entry.getValue();

// 更新库存
productService.updateStock(productId, quantity);

Product product = productService.getProductById(productId);
OrderItem item = new OrderItem();
item.setOrder(order);
item.setProduct(product);
item.setQuantity(quantity);
item.setPrice(product.getPrice());

orderItems.add(item);
totalAmount = totalAmount.add(product.getPrice().multiply(new BigDecimal(quantity)));
}

order.setOrderItems(orderItems);
order.setTotalAmount(totalAmount);

return orderRepository.save(order);
}
}

6、Controller层（控制层）

java
@Controller
public class HomeController {

@Autowired
private ProductService productService;

@GetMapping(/)
public String home(Model model,
@RequestParam(defaultValue = 0) int page,
@RequestParam(defaultValue = 9) int size) {
Pageable pageable = PageRequest.of(page, size);
Page<Product products = productService.getProducts(pageable);
model.addAttribute(products, products);
return home;
}

@GetMapping(/search)
public String search(@RequestParam String keyword,
@RequestParam(defaultValue = 0) int page,
Model model) {
Pageable pageable = PageRequest.of(page, 9);
Page<Product products = productService.searchProducts(keyword, pageable);
model.addAttribute(products, products);
model.addAttribute(keyword, keyword);
return search;
}
}

@Controller
@RequestMapping(/cart)
public class CartController {

@PostMapping(/add)
@ResponseBody
public ResponseEntity<? addToCart(@RequestParam Long productId,
@RequestParam Integer quantity,
HttpSession session) {
// 获取或创建购物车
Map<Long, Integer cart = (Map<Long, Integer)
session.getAttribute(cart);
if (cart == null) {
cart = new HashMap<();
session.setAttribute(cart, cart);
}

// 添加商品到购物车
cart.put(productId, cart.getOrDefault(productId, 0) + quantity);

return ResponseEntity.ok(Map.of(success, true, message, 添加成功));
}

@GetMapping
public String viewCart(HttpSession session, Model model) {
Map<Long, Integer cart = (Map<Long, Integer) session.getAttribute(cart);
if (cart == null) {
cart = new HashMap<();
}
model.addAttribute(cart, cart);
return cart;
}
}

@Controller
@RequestMapping(/order)
public class OrderController {

@Autowired
private OrderService orderService;

@PostMapping(/create)
public String createOrder(@RequestParam Map<String, String params,
Authentication authentication,
HttpSession session) {
User user = (User) authentication.getPrincipal();

// 解析购物车数据
Map<Long, Integer cartItems = parseCartItems(params);

// 创建订单
Order order = orderService.createOrder(user, cartItems);

// 清空购物车
session.removeAttribute(cart);

return redirect:/order/success/ + order.getId();
}
}

7、配置文件

yaml
application.yml
spring:
datasource:
url: jdbc:mysql://localhost:3306/shopping_db?useUnicode=true&characterEncoding=utf8
username: root
password: password
driver-class-name: com.mysql.cj.jdbc.Driver

jpa:
hibernate:
ddl-auto: update
show-sql: true
properties:
hibernate:
dialect: org.hibernate.dialect.MySQL8Dialect

redis:
host: localhost
port: 6379

thymeleaf:
cache: false

server:
port: 8080

分页配置
page:
size: 9

8、前端页面示例

html
<! templates/home.html
<!DOCTYPE html
<html xmlns:th=http://www.thymeleaf.org
<head
<meta charset=UTF-8
<title购物网站</title
<link href=/css/bootstrap.min.css rel=stylesheet
</head
<body
<! 导航栏
<nav class=navbar navbar-expand-lg navbar-dark bg-dark
<div class=container
<a class=navbar-brand href=/购物网站</a
<div

Ai作答

📣 商家广告：