我在计算有序列表及其副本的书号时遇到问题。
当我从书单中添加任何书的数量时，由于将书号和价格添加到具有其功能的现有书中，我得到了正确的总价结果。但是，删除过程无法完成。
当我从订购清单中删除任何一本书并编辑订单时，我得到的书号和计算总价的结果是错误的。
我检查了订单明细，删除的书在订单清单中有效，但是我无法将其价格加到总价中。
我的订单清单
1数量-10 $
2数量-30 $（我的附加费）
状态处理
总计40 $，总计书籍3的所有副本 在删除过程和编辑过程之后，
1数量-10 $
2数量-30 $（我的附加费）
状态已交付
总计10 $，总计书籍3的所有副本。 当我将交货状态更新为任何选定的项目时，
1数量-10 $
2数量-30 $（我的附加费）
状态处理
总计40 $，总计书籍3的所有副本 我认为从BookOrder删除图书项目并更新BookOrder会有问题。
我该如何解决？
<c:if test="${bookOrder != null}">
<h2 class="sub-header">
Sipariş #
<c:out value="${bookOrder.id}" />
</h2>
<div class="table-responsive">
<h2 class="sub-header">Sipariş Bilgisi</h2>
<form action="order_process" action="GET" class="form-inline">
<input id="orderId" name="orderId" type=hidden
value="${bookOrder.id}">
<table class="table table-striped">
<tr>
<th>Sipariş Veren</th>
<td><c:out value="${bookOrder.customerOrders.name}" /> <c:out
value="${bookOrder.customerOrders.surname}" /></td>
<tr>
<th>Kitap Adeti</th>
<td><c:out value="${bookOrder.allBookCopies}" /></td>
<tr>
<th>Toplam Fiyat</th>
<td><i class="fa fa-turkish-lira"></i> <fmt:setLocale
value="tr_TR" /> <fmt:formatNumber
value="${bookOrder.orderTotal}" minFractionDigits="2" /></td>
</tr>
<tr>
<th>Alıcı (Ad Soyad)</th>
<td><input type="text" class="form-control"
id="recipientNameText" name="recipientName"
value="${bookOrder.recipentName}" size="45" /></td>
</tr>
<tr>
<th>Alıcı Tel No</th>
<td><input type="text" class="form-control"
id="recipientPhoneText" name="recipientPhone"
value="${bookOrder.recipentPhone}" size="45" /></td>
</tr>
<tr>
<th>Teslimat Adres</th>
<td><input type="text" class="form-control"
id="shippingAddressText" name="shippingAddress"
value="${bookOrder.shippingAddress}" size="45" /></td>
</tr>
<tr>
<th>Ödeme Durumu</th>
<td><select name="paymentMethod" class="form-control">
<c:if test="${bookOrder.paymentMethod !=null}">
<option value="${bookOrder.paymentMethod}">${bookOrder.paymentMethod}</option>
</c:if>
</select></td>
</tr>
<tr>
<th>Sipariş Durum</th>
<td><select name="orderStatus" class="form-control">
<option value="İşleniyor"
<c:if test="${bookOrder.orderStatus eq 'İşleniyor' }">selected='selected'</c:if>>İşleniyor</option>
<option value="Shipping"
<c:if test="${bookOrder.orderStatus eq 'Shipping' }">selected='selected'</c:if>>Shipping</option>
<option value="Delivered"
<c:if test="${bookOrder.orderStatus eq 'Delivered' }">selected='selected'</c:if>>Delivered</option>
<option value="Completed"
<c:if test="${bookOrder.orderStatus eq 'Completed' }">selected='selected'</c:if>>Completed</option>
<option value="Cancelled"
<c:if test="${bookOrder.orderStatus eq 'Cancelled' }">selected='selected'</c:if>>Cancelled</option>
</select></td>
</tr>
<tr>
<th>Sipariş Tarihi</th>
<td><c:out value="${bookOrder.orderDate}" /></td>
</tr>
</table>
<h2 class="sub-header">Sipariş Edilenler</h2>
<table class="table table-striped">
<thead>
<tr>
<th>Index</th>
<th>Kitap Adı</th>
<th>Yazar</th>
<th>Fiyat</th>
<th>Miktar</th>
<th>Adet Fiyat</th>
<th>
<button type="submit" name="button" class="btn btn-info"
value="Ekle">Kitap Ekle</button>
</th>
</tr>
</thead>
<tbody>
<c:forEach var="detailOrder" items="${bookOrder.orderDetails}"
varStatus="status">
<tr>
<td><c:out value="${status.index + 1}" /></td>
<td><c:out value="${detailOrder.book.title}" /></td>
<td><c:out value="${detailOrder.book.author}" /></td>
<td><i class="fa fa-turkish-lira"></i> <fmt:setLocale
value="tr_TR" /> <fmt:formatNumber
value="${detailOrder.book.price}" minFractionDigits="2" /></td>
<td><input type="text" class="form-control"
name="quantity${status.index + 1}"
value="${detailOrder.quantity}" readonly size="5" /></td>
<td><i class="fa fa-turkish-lira"></i> <fmt:setLocale
value="tr_TR" /> <fmt:formatNumber
value="${detailOrder.subTotal}" minFractionDigits="2" /></td>
<td><input id="price" type="hidden" name="price"
value="${detailOrder.book.price}" /> <input id="bookId"
name="bookId" type=hidden value="${detailOrder.book.id}">
<button type="submit" name="button" class="btn btn-danger"
value="Delete">Delete</button></td>
</tr>
</c:forEach>
<tr>
<td colspan="4" align="right">Toplam :</td>
<td><c:out value="${bookOrder.allBookCopies}" /></td>
<td><i class="fa fa-turkish-lira"></i> <fmt:setLocale
value="tr_TR" /> <fmt:formatNumber
value="${bookOrder.orderTotal}" minFractionDigits="2" /></td>
</tr>
</tbody>
</table>
<div class="row">
<div class="col-sm-12 col-md-3 ">
<button type="submit" name="button"
class="btn btn-warning btn-block" value="Kaydet">Kaydet</button>
</div>
<div class="col-sm-12 col-md-3 ">
<button type="reset" id="buttonCancel" name="button"
class="btn btn-danger btn-block" value="Cancel">İptal</button>
</div>
</div>
</form>
</div>
</c:if>
订购流程Servlet
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println("OrderProcessServlet");
String button = request.getParameter("button");
if("Kaydet".equals(button)) {
System.out.println("OrderProcessServlet | Kaydet button is clicked");
saveBookToOrder(request, response);
}else if("Cancel".equals(button)) {
System.out.println("OrderProcessServlet | Cancel button is clicked");
String page = "list_orders.jsp";
response.sendRedirect(page);
}else if("Delete".equals(button)) {
System.out.println("OrderProcessServlet | Delete is working");
delete(request, response);
}else if("Ekle".equals(button)) {
System.out.println("OrderProcessServlet | Ekle is working");
addBookToOrderList(request, response);
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
private void saveBookToOrder(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println("OrderProcessServlet | saveBookToOrder is working");
int orderId = Integer.parseInt(request.getParameter("orderId"));
String recipientName = request.getParameter("recipientName");
String recipientPhone = request.getParameter("recipientPhone");
String shippingAddress = request.getParameter("shippingAddress");
System.out.println("SaveBookOrderServlet | recipientName : " + recipientName);
System.out.println("SaveBookOrderServlet | recipientPhone : " + recipientPhone);
System.out.println("SaveBookOrderServlet | shippingAddress : " + shippingAddress);
StringBuilder errorMessage = new StringBuilder();
String errorMessageText = showErrorMessage(recipientName, recipientPhone, shippingAddress, errorMessage);
System.out.println("OrderProcessServlet | Before if-else statement | errorMessageText : " + errorMessageText);
if(!errorMessageText.isEmpty()) {
System.out.println("OrderProcessServlet | !errorMessageText.isEmpty() | errorMessageText : " + errorMessageText);
CommonUtility.errorMessage(errorMessageText, request);
BookOrdersService bookOrdersService = new BookOrdersService();
BookOrders bookOrder = bookOrdersService.getBookOrdersById(orderId);
request.setAttribute("bookOrder", bookOrder);
String resultPage = "order_form.jsp";
RequestDispatcher dispatcher = request.getRequestDispatcher(resultPage);
dispatcher.forward(request, response);
}else {
System.out.println("OrderProcessServlet | errorMessageText.isEmpty() | errorMessageText : " + errorMessageText);
BookOrdersService bookOrdersService = new BookOrdersService();
BookOrders bookOrder = bookOrdersService.getBookOrdersById(orderId);
String paymentMethod = request.getParameter("paymentMethod");
String orderStatus = request.getParameter("orderStatus");
System.out.println("OrderProcessServlet | paymentMethod : " + paymentMethod);
System.out.println("OrderProcessServlet | orderStatus : " + orderStatus);
bookOrder.setRecipentName(recipientName);
bookOrder.setRecipentPhone(recipientPhone);
bookOrder.setShippingAddress(shippingAddress);
bookOrder.setPaymentMethod(paymentMethod);
bookOrder.setOrderStatus(orderStatus);
String[] arrayBookId = request.getParameterValues("bookId");
String[] arrayPrice = request.getParameterValues("price");
String[] arrayQuantity = new String[arrayBookId.length];
for (int i = 1; i <= arrayQuantity.length; i++) {
arrayQuantity[i - 1] = request.getParameter("quantity" + i);
}
Set<DetailOrder> orderDetails = bookOrder.getOrderDetails();
orderDetails.clear();
float totalAmount = 0.0f;
for (int i = 0; i < arrayBookId.length; i++) {
int bookId = Integer.parseInt(arrayBookId[i]);
int quantity = Integer.parseInt(arrayQuantity[i]);
float price = Float.parseFloat(arrayPrice[i]);
float subtotal = price * quantity;
DetailOrder orderDetail = new DetailOrder();
orderDetail.setBook(new Book(bookId));
orderDetail.setQuantity(quantity);
orderDetail.setSubTotal(subtotal);
orderDetail.setOrders(bookOrder);
orderDetails.add(orderDetail);
totalAmount += subtotal;
}
bookOrder.setOrderTotal(totalAmount);
System.out.println("------------------------------------------------------------");
System.out.println(bookOrder.getId() + "# RecipentName : " + bookOrder.getRecipentName());
System.out.println(bookOrder.getId() + "# RecipentPhone : " + bookOrder.getRecipentPhone());
System.out.println(bookOrder.getId() + "# ShippingAddress : " + bookOrder.getShippingAddress());
System.out.println(bookOrder.getId() + "# OrderStatus : " + bookOrder.getOrderStatus());
System.out.println(bookOrder.getId() + "# PaymentMethod : " + bookOrder.getPaymentMethod());
System.out.println(bookOrder.getId() + "# AllBookCopies : " + bookOrder.getAllBookCopies());
for (DetailOrder detail : bookOrder.getOrderDetails()) {
Book book = detail.getBook();
int quantity = detail.getQuantity();
float subtotal = detail.getSubTotal();
System.out.println("\tBook Name : " + book.getTitle()
+ "| Book Quantity : " + quantity + " | Sub Total : " + subtotal);
System.out.println("----------------------------------------------------------------------------");
}
System.out.println("----------------------------------------------------------------");
bookOrdersService.updateBookOrder(bookOrder);
String message = "Order # " + bookOrder.getId() + " Updated.";
CommonUtility.successMessage(message, request);
List<BookOrders> bookOrdersList = bookOrdersService.listBookOrders();
// set attribute for usersList in request
request.setAttribute("bookOrdersList", bookOrdersList);
String page = "list_orders.jsp";
RequestDispatcher dispatcher = request.getRequestDispatcher(page);
dispatcher.forward(request, response);
}
}
private String showErrorMessage(String recipientName, String recipientPhone, String shippingAddress,
StringBuilder errorMessage) {
System.out.println("OrderProcessServlet | showErrorMessage function is working");
if(recipientName.equals("")) {
System.out.println("OrderProcessServlet | recipientName is empty");
String message = "Alıcı Alanı Boş Bırakılmış. ";
errorMessage.append(message);
}
if(recipientPhone.equals("")) {
System.out.println("OrderProcessServlet | recipientName is empty");
String message = "Telefon Alanı Boş Bırakılmış. ";
errorMessage.append(message);
}
if(shippingAddress.equals("")) {
System.out.println("OrderProcessServlet | recipientName is empty");
String message = "Teslimat Adresi Alanı Boş Bırakılmış. ";
errorMessage.append(message);
}
String errorMessageText = errorMessage.toString();
System.out.println("OrderProcessServlet | showErrorMessage | errorMessageText : " + errorMessageText);
return errorMessageText;
}
private void delete(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
System.out.println("OrderProcessServlet | delete is working");
int bookId = Integer.parseInt(request.getParameter("bookId"));
int orderId = Integer.parseInt(request.getParameter("orderId"));
BookOrdersService bookOrdersService = new BookOrdersService();
BookOrders bookOrder = bookOrdersService.getBookOrdersById(orderId);
if(bookOrder == null) {
System.out.println("OrderProcessServlet | delete | bookOrder is null");
}
Set<DetailOrder> orderDetails = bookOrder.getOrderDetails();
Iterator<DetailOrder> iterator = orderDetails.iterator();
Set<DetailOrder> newOrderDetails = null;
while (iterator.hasNext()) {
DetailOrder orderDetail = iterator.next();
if (orderDetail.getBook().getId() == bookId) {
System.out.println("OrderProcessServlet | delete | Book Title : " + orderDetail.getBook().getTitle() + " silindi.");
float newTotal = bookOrder.getOrderTotal() - orderDetail.getSubTotal();
bookOrder.setOrderTotal(newTotal);
iterator.remove();
}
}
request.setAttribute("bookOrder", bookOrder);
String editOrderFormPage = "order_form.jsp";
RequestDispatcher dispatcher = request.getRequestDispatcher(editOrderFormPage);
dispatcher.forward(request, response);
}
private void addBookToOrderList(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
BookService bookService = new BookService();
BookOrdersService bookOrdersService = new BookOrdersService();
int orderId = Integer.parseInt(request.getParameter("orderId"));
BookOrders bookOrder = bookOrdersService.getBookOrdersById(orderId);
if(bookOrder !=null) {
System.out.println("OrderProcessServlet | addBookToOrderList | bookOrder is not null");
}
List<Book> bookList = bookService.listBook();
request.setAttribute("bookList", bookList);
request.setAttribute("bookOrder",bookOrder);
request.setAttribute("orderId",orderId);
String page = "list_order_books.jsp";
RequestDispatcher dispatcher = request.getRequestDispatcher(page);
dispatcher.forward(request, response);
}