장바구니 주문

1) 장바구니 페이지에서 주문할 상품 데이터를 전달할 DTO 생성

package com.shop.dto;

import lombok.Getter;
import lombok.Setter;

import java.util.List;

@Getter
@Setter
public class CartOrderDto {
    private Long cartItemId;
    private List<CartOrderDto> cartOrderDtoList;
}

 

2) 서비스 구현

- OrderService 클래스에 장바구니에서 주문할 상품 데이터를 전달받아서 주문을 생성하는 로직

package com.shop.service;

import com.shop.dto.OrderDto;
import com.shop.dto.OrderHistDto;
import com.shop.dto.OrderItemDto;
import com.shop.entity.*;
import com.shop.repository.ItemImgRepository;
import com.shop.repository.ItemRepository;
import com.shop.repository.MemberRepository;
import com.shop.repository.OrderRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageImpl;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.thymeleaf.util.StringUtils;

import javax.persistence.EntityNotFoundException;
import java.util.ArrayList;
import java.util.List;

@Service
@Transactional
@RequiredArgsConstructor
public class OrderService {
    private final ItemRepository itemRepository;
    private final MemberRepository memberRepository;
    private final OrderRepository orderRepository;
    private final ItemImgRepository itemImgRepository;

    ...

    public Long orders(List<OrderDto> orderDtoList, String email){
        Member member = memberRepository.findByEmail(email);
        List<OrderItem> orderItemList = new ArrayList<>();

        for(OrderDto orderDto : orderDtoList){
            Item item = itemRepository.findById(orderDto.getItemId()).orElseThrow(EntityNotFoundException::new);
            OrderItem orderItem = OrderItem.createOrderItem(item, orderDto.getCount());
            orderItemList.add(orderItem);
        }

        Order order = Order.createOrder(member, orderItemList);
        orderRepository.save(order);
        return order.getId();
    }
}

 

- CartService 클래스에서는 주문 로직으로 전달할 orderDto 리스트 생성 및 주문 로직 호출, 주문한 상품은 장바구니에서 제거하는 로직을 구현

package com.shop.service;

import com.shop.dto.CartDetailDto;
import com.shop.dto.CartItemDto;
import com.shop.dto.CartOrderDto;
import com.shop.dto.OrderDto;
import com.shop.entity.*;
import com.shop.repository.CartItemRepository;
import com.shop.repository.CartRepository;
import com.shop.repository.ItemRepository;
import com.shop.repository.MemberRepository;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.thymeleaf.util.StringUtils;

import javax.persistence.EntityNotFoundException;
import java.util.ArrayList;
import java.util.List;

@Service
@RequiredArgsConstructor
@Transactional
public class CartService {
    private final ItemRepository itemRepository;
    private final MemberRepository memberRepository;
    private final CartRepository cartRepository;
    private final CartItemRepository cartItemRepository;
    private final OrderService orderService;

    ...

    public Long orderCartItem(List<CartOrderDto> cartOrderDtoList, String email){
        List<OrderDto> orderDtoList = new ArrayList<>();
        for(CartOrderDto cartOrderDto : cartOrderDtoList){
            CartItem cartItem = cartItemRepository.findById(cartOrderDto.getCartItemId()).orElseThrow(EntityNotFoundException::new);
            OrderDto orderDto = new OrderDto();
            orderDto.setItemId(cartItem.getItem().getId());
            orderDto.setCount(cartItem.getCount());
            orderDtoList.add(orderDto);
        }

        Long orderId = orderService.orders(orderDtoList, email);

        for(CartOrderDto cartOrderDto : cartOrderDtoList){
            CartItem cartItem = cartItemRepository.findById(cartOrderDto.getCartItemId()).orElseThrow(EntityNotFoundException::new);
            cartItemRepository.delete(cartItem);
        }

        return orderId;
    }
}

 

3) 컨트롤러 구현

package com.shop.controller;

import com.shop.dto.CartDetailDto;
import com.shop.dto.CartItemDto;
import com.shop.dto.CartOrderDto;
import com.shop.service.CartService;
import lombok.RequiredArgsConstructor;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;
import java.security.Principal;
import java.util.List;

@Controller
@RequiredArgsConstructor
public class CartController {
    private final CartService cartService;

    ...

    @PostMapping(value = "/cart/orders")
    public @ResponseBody ResponseEntity orderCartItem(@RequestBody CartOrderDto cartOrderDto, Principal principal){
        List<CartOrderDto> cartOrderDtoList = cartOrderDto.getCartOrderDtoList();
        if(cartOrderDtoList == null || cartOrderDtoList.size() == 0){
            return new ResponseEntity<String>("주문할 상품을 선택해주세요", HttpStatus.BAD_REQUEST);
        }

        for(CartOrderDto cartOrder : cartOrderDtoList){
            if(!cartService.validateCartItem(cartOrder.getCartItemId(), principal.getName())){
                return new ResponseEntity<String>("주문 권한이 없습니다.", HttpStatus.BAD_REQUEST);
            }
        }

        Long orderId = cartService.orderCartItem(cartOrderDtoList, principal.getName());
        return new ResponseEntity<Long>(orderId, HttpStatus.OK);
    }
}

 

4) cartList.html 구현

소스코드중 orders() 함수만 보면됨

아래링크 참고

https://github.com/gusrl6394/SpringbootShop/blob/master/src/main/resources/templates/cart/cartList.html