帮我在user（uid，uname,upwd）,commodity(cid,cname,cprice),cart(cartid,uid,cid,cnum,cartprice，cartselected)三个表的基础上，用springboot 、maven完成购物车功能，包括entiity,controller,service,reposity，HTML等文件，告诉我代码以及pom文件里添加的依赖项

好的，以下是购物车功能的代码示例和pom文件依赖项：

1. Entity类：

User.java

@Entity
@Table(name = "user")
public class User {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private int uid;
    private String uname;
    private String upwd;
    
    // getter, setter, constructor
}

Commodity.java
@Entity
@Table(name = "commodity")
public class Commodity {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private int cid;
    private String cname;
    private double cprice;

    // getter, setter, constructor
}

Cart.java
@Entity
@Table(name = "cart")
public class Cart {
    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    private int cartid;
    private int uid;
    private int cid;
    private int cnum;
    private double cartprice;
    private boolean cartselected;

    // getter, setter, constructor
}

2. Repository类：

UserRepository.java

@Repository
public interface UserRepository extends JpaRepository<User, Integer> {
    // 根据用户名和密码查询用户
    User findByUnameAndUpwd(String uname, String upwd);
}

CommodityRepository.java
@Repository
public interface CommodityRepository extends JpaRepository<Commodity, Integer> {

}

CartRepository.java
@Repository
public interface CartRepository extends JpaRepository<Cart, Integer> {
    // 根据用户id查询购物车
    List<Cart> findByUid(int uid);

    // 根据用户id和商品id查询购物车
    Cart findByUidAndCid(int uid, int cid);

    // 根据用户id和购物车id查询购物车
    Cart findByUidAndCartid(int uid, int cartid);
}

3. Service类：

UserService.java
@Service
public class UserService {
@Autowired
private UserRepository userRepository;

// 登录
public User login(String uname, String upwd) {
return userRepository.findByUnameAndUpwd(uname, upwd);
}
}

CommodityService.java
@Service
public class CommodityService {
@Autowired
private CommodityRepository commodityRepository;

// 查询所有商品
public List<Commodity> findAll() {
return commodityRepository.findAll();
}
}

CartService.java
@Service
public class CartService {
@Autowired
private CartRepository cartRepository;

// 查询购物车
public List<Cart> findByUid(int uid) {
return cartRepository.findByUid(uid);
}

// 添加商品到购物车
public boolean addToCart(Cart cart) {
Cart oldCart = cartRepository.findByUidAndCid(cart.getUid(), cart.getCid());
if (oldCart != null) {
oldCart.setCnum(oldCart.getCnum() + cart.getCnum());
oldCart.setCartprice(oldCart.getCartprice() + cart.getCartprice());
cartRepository.save(oldCart);
} else {
cartRepository.save(cart);
}
return true;
}

// 修改购物车商品数量
public boolean updateCart(Cart cart) {
Cart oldCart = cartRepository.findByUidAndCartid(cart.getUid(), cart.getCartid());
if (oldCart != null) {
oldCart.setCnum(cart.getCnum());
oldCart.setCartprice(cart.getCartprice());
cartRepository.save(oldCart);
return true;
}
return false;
}

// 删除购物车商品
public boolean deleteCart(int uid, int cartid) {
Cart cart = cartRepository.findByUidAndCartid(uid, cartid);
if (cart != null) {
cartRepository.delete(cart);
return true;
}
return false;
}
}

4. Controller类：

UserController.java
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;

// 登录
@PostMapping("/login")
public String login(@RequestParam String uname, @RequestParam String upwd) {
User user = userService.login(uname, upwd);
if (user != null) {
return "success";
}
return "fail";
}
}

CommodityController.java
@RestController
@RequestMapping("/commodity")
public class CommodityController {
@Autowired
private CommodityService commodityService;

// 查询所有商品
@GetMapping("/findAll")
public List<Commodity> findAll() {
return commodityService.findAll();
}
}

CartController.java
@RestController
@RequestMapping("/cart")
public class CartController {
@Autowired
private CartService cartService;

// 查询购物车
@GetMapping("/findByUid")
public List<Cart> findByUid(@RequestParam int uid) {
return cartService.findByUid(uid);
}

// 添加商品到购物车
@PostMapping("/addToCart")
public String addToCart(@RequestParam int uid, @RequestParam int cid, @RequestParam int cnum, @RequestParam double cartprice) {
Cart cart = new Cart();
cart.setUid(uid);
cart.setCid(cid);
cart.setCnum(cnum);
cart.setCartprice(cartprice);
boolean result = cartService.addToCart(cart);
if (result) {
return "success";
}
return "fail";
}

// 修改购物车商品数量
@PostMapping("/updateCart")
public String updateCart(@RequestBody Cart cart) {
boolean result = cartService.updateCart(cart);
if (result) {
return "success";
}
return "fail";
}

// 删除购物车商品
@PostMapping("/deleteCart")
public String deleteCart(@RequestParam int uid, @RequestParam int cartid) {
boolean result = cartService.deleteCart(uid, cartid);
if (result) {
return "success";
}
return "fail";
}
}

5. HTML文件：

购物车页面cart.html：

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>购物车</title>
</head>
<body>
    <table>
        <tr>
            <th>商品名称</th>
            <th>商品价格</th>
            <th>商品数量</th>
            <th>商品小计</th>
            <th>操作</th>
        </tr>
        <tbody id="cartTable"></tbody>
    </table>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
    <script>
        $(function() {
            // 查询购物车
            $.ajax({
                url: "/cart/findByUid",
                type: "GET",
                data: {
                    uid: 1
                },
                success: function(data) {
                    var html = "";
                    for (var i = 0; i < data.length; i++) {
                        var item = data[i];
                        html += "<tr>";
                        html += "<td>" + item.cname + "</td>";
                        html += "<td>" + item.cprice + "</td>";
                        html += "<td><input type='number' value='" + item.cnum + "' onchange='updateCart(" + item.cartid + ", $(this).val())' /></td>";
                        html += "<td>" + item.cartprice + "</td>";
                        html += "<td><a href='#' onclick='deleteCart(" + item.cartid + ")'>删除</a></td>";
                        html += "</tr>";
                    }
                    $("#cartTable").html(html);
                }
            });
        });

        // 添加商品到购物车
        function addToCart(cid, cprice) {
            $.ajax({
                url: "/cart/addToCart",
                type: "POST",
                data: {
                    uid: 1,
                    cid: cid,
                    cnum: 1,
                    cartprice: cprice
                },
                success: function(data) {
                    if (data == "success") {
                        alert("添加成功！");
                    } else {
                        alert("添加失败！");
                    }
                }
            });
        }

        // 修改购物车商品数量
        function updateCart(cartid, cnum) {
            $.ajax({
                url: "/cart/updateCart",
                type: "POST",
                dataType: "json",
                contentType: "application/json;charset=utf-8",
                data: JSON.stringify({
                    uid: 1,
                    cartid: cartid,
                    cnum: cnum,
                    cartprice: 0
                }),
                success: function(data) {
                    if (data == "success") {
                        alert("修改成功！");
                    } else {
                        alert("修改失败！");
                    }
                }
            });
        }

        // 删除购物车商品
        function deleteCart(cartid) {
            $.ajax({
                url: "/cart/deleteCart",
                type: "POST",
                data: {
                    uid: 1,
                    cartid: cartid
                },
                success: function(data) {
                    if (data == "success") {
                        alert("删除成功！");
                        window.location.reload();
                    } else {
                        alert("删除失败！");
                    }
                }
            });
        }
    </script>
</body>
</html>

6. pom.xml文件依赖项：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.23</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.12.3</version>
    </dependency>
</dependencies>