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jsp購物車代碼

發布時間: 2021-01-01 03:08:27

㈠ 在JSP中怎樣實現購物車計數

問題比較怪異~
既然都會做購物車了~那麼計數又又什麼難的？
無非都是統計數字專罷了~
如果是問的購物車中總共又屬多少類商品，那麼只要統計集合中又多少個商品對象就可以了，用count或者size方法（視你所用集合而定）
如果問的是每類商品有多少個，那麼只要再再商品對象中加一個數量的屬性就OK了，無論增加或減小商品數量也只要修改這個屬性的值就可以~

㈡ 如何用java和jsp做一個簡單的購物車

頁面jsp ：

<%@pagelanguage="java"contentType="text/html;charset=utf-8"
pageEncoding="utf-8"%>
<%@taglibprefix="c"uri="
<%@tagliburi="

<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""
<htmlxmlns="
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<title>易買網-首頁</title>
<linktype="text/css"rel="stylesheet"href="${pageContext.request.contextPath}/css/style.css"/>
<scripttype="text/javascript"src="${pageContext.request.contextPath}/js/jquery-2.1.1.js"></script>
<scripttype="text/javascript">
varcontextPath='${pageContext.request.contextPath}'
</script>
<scripttype="text/javascript"src="${pageContext.request.contextPath}/js/shopping.js"></script>
</head>
<body>
<jsp:includepage="top.jsp"/>
<divid="position"class="wrap">
	您現在的位置：<ahref="Home">易買網</a>&gt;購物車
</div>
<divclass="wrap">
	<divid="shopping">
		<formaction=""method="post">
			<table>
				<tr>
					<th>商品名稱</th>
					<th>商品價格</th>
					<th>購買數量</th>
					<th>操作</th>
				</tr>
				<c:forEachitems="${sessionScope.shopCar}"var="item"varStatus="status">
				<trid="proct_id_${item.proId}">
					<tdclass="thumb"><imgsrc="${item.proImg}"height="50"width="30"/><ahref="Proct?action=view&entityId=${item.proId}">${item.proName}</a></td>
					<tdclass="price"id="price_id_1">
						<span><fmt:formatNumbervalue="${item.proPrice}"type="NUMBER"minFractionDigits="2"/></span>
						<inputtype="hidden"value="${item.proPrice}"/>
					</td>
					<tdclass="number">
						<dl>
							<dt><spanonclick="sub('number_id_${item.proId}','${item.proId}')">－</span><inputid="number_id_${item.proId}"type="text"readonly="readonly"name="number"value="${item.proNum}"/><spanonclick="addNum('number_id_${item.proId}','${item.proId}')">＋</span></dt>
							
						</dl>
					</td>
					<tdclass="delete"><ahref="javascript:deleteItem('proct_id_${item.proId}','${item.proId}')">刪除</a></td>
				</tr>
				</c:forEach>
			</table>
			<divclass="button"><inputtype="submit"value=""/></div>
		</form>
	</div>
</div>
<divid="footer">
	Copyright&;kaka292817678itjob遠標培訓.
</div>
</body>
</html>



頁面關聯的js 自己去網上下載一個jquery
/*數量減少*/
functionsub(id,proId){
	//購買數量的值
	varnum=$('#'+id).val();
	if(num>1){
		$('#'+id).val(num-1);
	}
	
	edit(id,proId);
	
}

functionedit(id,proId){
	varurl=contextPath+'/HomeCarManager'
	//修改後的數量，購物明細的商品的id
	num=$('#'+id).val();
	$.post(url,{"num":num,"proId":proId},function(msg){
		/*
		if(msg=='true'){
			alert('修改成功');
		}else{
			alert('修改失敗');
		}*/
	});
}
/**
*數量增加
*@param{}id
*/
functionaddNum(id,proId){
	//購買數量的值
	varnum=$('#'+id).val();
	$('#'+id).val(parseInt(num)+1);	
	edit(id,proId);
}

/**
*刪除購物明細
*/
functiondeleteItem(trId,proId){
	//
	//console.log($("#"+trId));
	//js刪除頁面節點
	//$("#"+trId).remove();
	varurl=contextPath+'/HomeCarManager'
	$.post(url,{"proId":proId},function(msg){
		if(msg=='true'){
			//js刪除頁面節點
			$("#"+trId).remove();
		}
	});
	
}



後台servlet1
packagecom.kaka.web;

importjava.io.IOException;
importjava.io.PrintWriter;
importjava.util.ArrayList;
importjava.util.List;

importjavax.servlet.ServletException;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
/**
*購物車處理類
*@author@authorITJob遠標培訓
*
*/

importcom.kaka.entity.Items;
importcom.kaka.entity.Proct;
importcom.kaka.service.ProctService;
importcom.kaka.service.impl.ProctServiceImpl;
{

	=1L;
	ProctServiceps=newProctServiceImpl();
	@Override
	protectedvoiddoPost(HttpServletRequestreq,HttpServletResponseresp)throwsServletException,IOException{
		//獲取商品的id
		StringproId=req.getParameter("proId");
		resp.setContentType("text/html;charset=UTF-8");
		PrintWriterwriter=resp.getWriter();
		if(null!=proId&&!"".equals(proId)){
			//返回添加購物車成功
			//System.out.println("============="+proId);
			//根據商品的id查詢商品
			try{
				IntegerpId=Integer.parseInt(proId);
				Proctproct=ps.findProctById(pId);
				if(null!=proct){
					//查詢到了商品，將商品的相關參數構建一個購物明細放入到購物車
					Itemsit=newItems();
					it.setProId(proct.getProId());
					it.setProName(proct.getProName());
					it.setProPrice(proct.getProPrice());
					it.setProImg(proct.getProImg());
					
					//先判斷session范圍是否有購物車
					List<Items>shopCar=(List<Items>)req.getSession().getAttribute("shopCar");
					if(null==shopCar){
						//購物車
						shopCar=newArrayList<Items>();
					}
					//將商品加入到購物車之前，判斷購物車中是否已經包含了該購物明細，如果包含了，只需要修改購買的數量
					if(shopCar.contains(it)){
						intindex=shopCar.indexOf(it);//尋找購物車中包含購物明細在購物車中位置
						Itemsitems=shopCar.get(index);//獲取購物車中存在的購物明細
						items.setProNum(items.getProNum()+1);
					}else{
						shopCar.add(it);
					}
					
					
					//將購物車放入到session訪問
					req.getSession().setAttribute("shopCar",shopCar);
					//返回
					writer.print(true);
				}else{
					writer.print(false);
				}
			}catch(Exceptione){
				e.printStackTrace();
				writer.print(false);
			}
		}else{
			writer.print(false);
		}
		writer.flush();
		writer.close();
	}
	@Override
	protectedvoiddoGet(HttpServletRequestreq,HttpServletResponseresp)throwsServletException,IOException{
		doPost(req,resp);
	}
}



後台管理servlet
packagecom.kaka.web;

importjava.io.IOException;
importjava.io.PrintWriter;
importjava.util.ArrayList;
importjava.util.List;

importjavax.mail.FetchProfile.Item;
importjavax.servlet.ServletException;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
/**
*購物車修改
*@authorITJob遠標培訓
*
*/

importcom.kaka.entity.Items;
importcom.kaka.entity.Proct;
importcom.kaka.service.ProctService;
importcom.kaka.service.impl.ProctServiceImpl;
{

	=1L;
	ProctServiceps=newProctServiceImpl();
	@Override
	protectedvoiddoPost(HttpServletRequestreq,HttpServletResponseresp)throwsServletException,IOException{
		resp.setContentType("text/html;charset=UTF-8");
		PrintWriterwriter=resp.getWriter();
		//獲取參數
		StringproId=req.getParameter("proId");
		Stringnum=req.getParameter("num");
		if(null!=proId&&null!=num
				&&!"".equals(proId)&&!"".equals(num)){
			try{
				IntegerpId=Integer.parseInt(proId);
				FloatpNum=Float.parseFloat(num);
				
				//根據商品的id獲取對應的明細項
				//先判斷session范圍是否有購物車
				List<Items>shopCar=(List<Items>)req.getSession().getAttribute("shopCar");
				for(Itemsit:shopCar){
					if(it.getProId()==pId){
						it.setProNum(pNum);
					}
				}
				writer.print(true);
			}catch(Exceptione){
				e.printStackTrace();
			}
		}else{
			//刪除的操作
			try{
				IntegerpId=Integer.parseInt(proId);
				//根據商品的id獲取對應的明細項
				//先判斷session范圍是否有購物車
				List<Items>shopCar=(List<Items>)req.getSession().getAttribute("shopCar");
				Itemsitems=null;
				for(Itemsit:shopCar){
					if(it.getProId()==pId){
						items=it;
						break;
					}
				}
				if(null!=items){
					shopCar.remove(items);
					req.getSession().setAttribute("shopCar",shopCar);
				}
				
				writer.print(true);
			}catch(Exceptione){
				e.printStackTrace();
			}
		}
		
		writer.flush();
		writer.close();
	}
	@Override
	protectedvoiddoGet(HttpServletRequestreq,HttpServletResponseresp)throwsServletException,IOException{
		doPost(req,resp);
	}
}

㈢ 用jsp和資料庫做購物車，怎麼能通過點擊按鈕把購買數量和商品信息傳給購物車頁面，急！！下面是部分代碼

你把購買的數量和商品信息做成一個javabean，然後把這個javabean存在session裡面，你點擊按鈕就向伺服器端發出請求，然後伺服器端處理請求後用jsp顯示，這樣就可以了呀

㈣ jsp+mysql購物車示例

通過這個方抄法request.getsession().setAttribute("cart",購物車的數據);放入，然後需要提取的時候就通過request.getsession().getAttribute("cart");得到數據，然後在往資料庫裡面插就好了。

㈤ Jsp寫的購物車代碼

這是其中的一段代碼,要項目的話加445899710
HttpSession session = request.getSession(false);

if(session==null){
dispatcher = request.getRequestDispatcher("show.jsp");
dispatcher.forward(request, response);
}

FoodBean foodBean = (FoodBean)session.getAttribute("FoodToAdd");
Map cart = (Map)session.getAttribute("cart");

if(cart==null){
cart = new HashMap();
session.setAttribute("cart", cart);
}

CartItemBean cartItem = (CartItemBean)cart.get(foodBean.getFoodID());
if(cartItem==null){
cart.put(foodBean.getFoodID(), new CartItemBean(foodBean,1));
}else{
cartItem.setNumber(cartItem.getNumber()+1);
}

㈥ 求ejb+jsp實現簡單購物車功能的代碼

修改下述的例子，增加web功能

（1）提供登錄頁面Login.jsp；
只需要登錄名與密碼（可在程序中硬編碼）
（2）圖書列表頁面
列出所有可出售的圖書供用戶選擇；
圖書只需給出圖書名（可在程序中硬編碼）
（3）提供購物車商品的管理頁面：
能夠向購物車中添加圖書（從圖書列表中選擇）；
能夠刪除購物車中的圖書；
能夠察看購物車中的圖書信息
（4）用戶可主動退出系統

一個EJB例子如下（購物車）
import java.util.*;
import javax.ejb.Stateful;
import javax.ejb.*;

@Stateful(mappedName="cart")
public class CartBean implements Cart{
String customerName;
String customerId;
List<String> contents;
//ArrayList<String> contents;

public void initialize(String person) throws BookException {
if (person == null) {
throw new BookException("不允許沒有用戶！");
} else {
customerName = person;
}
customerId = "0";
contents = new ArrayList<String>();
}

public void initialize(String person, String id)
throws BookException {
if (person == null) {
throw new BookException("不允許沒有用戶！");
} else {
customerName = person;
}
IdVerifier idChecker = new IdVerifier();
if (idChecker.validate(id)) {
customerId = id;
} else {
throw new BookException("無效的ID: " + id);
}
contents = new ArrayList<String>();
}

public void addBook(String title) {
contents.add(title);
}
public void removeBook(String title) throws BookException {
boolean result = contents.remove(title);
if (result == false) {
throw new BookException(title + " 不在購物車中。");
}
}
public List<String> getContents() {
return contents;
}
@Remove()
public void remove() {
contents = null;
}
}

㈦ jsp購物車的代碼和資料庫

//購物車類ShoppingCart，僅供參考
packagebookshop;
importjava.util.*;
importjava.sql.*;
importjava.text.*;
publicclassShoppingCart{
HashMapitems=null;
publicShoppingCart(){
items=newHashMap();
}
publicsynchronizedvoidadd(StringbookID)throwsException{
if(items.containsKey(bookID))
{
ShoppingCartItemitem=(ShoppingCartItem)items.get(bookID);
item.quantity++;
}
else
{
Stringsql="SELECT*FROMtb_BookWHEREbookID='"+bookID
+"'";
DBHandledbhandle=newDBHandle();
ResultSetrs=dbhandle.executeQuery(sql);
ShoppingCartItemnewItem=newShoppingCartItem();
if(rs.next()){
newItem.bookID=bookID;
newItem.isbn=rs.getString("ISBN");
newItem.bookName=rs.getString("bookName");
newItem.bookImage=rs.getString("bookImage");
newItem.categoryID=rs.getString("categoryID");
newItem.author=rs.getString("author");
newItem.price=rs.getFloat("price");
newItem.description=rs.getString("description");
newItem.quantity=1;
dbhandle.closeResource();
items.put(bookID,newItem);
}
}
}

publicsynchronizedvoidsetItem(StringBookID,intnum){
if(items.containsKey(BookID)){
ShoppingCartItemitem=(ShoppingCartItem)items.get(BookID);
item.quantity=num;
}
}

publicsynchronizedvoidremove(StringBookID){
items.remove(BookID);
}

(){
Collectionc=items.values();
returnc.iterator();
}

protectedvoidfinalize()throwsThrowable{
items.clear();
}

(){
returnitems.size();
}

(){
doubleamount=0.0;
for(Iteratori=getItems();i.hasNext();){
ShoppingCartItemitem=(ShoppingCartItem)i.next();
amount+=item.quantity*item.price;
}
returnroundOff(amount);
}

privatedoubleroundOff(doublex){
longval=Math.round(x*100);//cents
returnval/100;
}

publicsynchronizedvoidclear(){
items.clear();
}

publicintpayOrder(StringuserName,StringtrueName,Stringpostcode,
Stringaddress,Stringtelephone,Stringmemo)throwsException{
Connectionconn=null;
intorderID=0;
DBHandledbhandle=newDBHandle();
try{
conn=dbhandle.getConnection();
conn.setAutoCommit(false);

Statementstmt=conn.createStatement();
doubletotal=getTotal();
SimpleDateFormatdataFormat=newSimpleDateFormat(
"yyyy-MM-ddHH:mm:ss");
StringorderDate=dataFormat.format(newjava.util.Date());
Stringsql="INSERTINTOtb_Orders(userName,trueName,address,postcode,tel,memo,totalPrice,isPay,isDeliver,orderDate)VALUES('"
+userName+"','"+trueName
+"','"
+address
+"','"
+postcode
+"','"
+telephone
+"','"
+memo
+"',"
+total+",'0','0','"+orderDate+"')";
System.out.println(sql);
stmt.executeUpdate(sql);
sql="SELECTMAX(orderID)ASmaxOrderIDFROMtb_Orders";//改動
System.out.println(sql);
ResultSetrs=stmt.executeQuery(sql);
rs.next();
orderID=rs.getInt(1);
Iteratori=getItems();
while(i.hasNext()){
ShoppingCartItemitem=(ShoppingCartItem)i.next();
intquantity=item.quantity;
Stringid=item.bookID;
doubleprice=item.price;
sql="INSERTINTOtb_OrderDetail(orderID,bookID,quantity,price)VALUES("
+orderID
+","
+id
+","
+quantity
+","
+price
+")";
stmt.executeUpdate(sql);
}
conn.commit();
conn.setAutoCommit(true);
}catch(Exceptionex){
conn.rollback();
System.out.println(ex.getMessage());
throwex;
}finally{
dbhandle.closeResource();
}
returnorderID;
}
}
//圖書信息類，ShoppingCartItem
packagebookshop;
publicclassShoppingCartItem{
publicStringbookID=null;
publicStringisbn=null;
publicStringbookName=null;
publicfloatprice=0.0F;
publicStringdescription=null;
publicStringbookImage=null;
publicStringauthor=null;
publicStringcategoryID=null;
publicintquantity;
}

㈧ 求修改或者給我JSP購物車代碼

看看，能不能幫你：

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<jsp:directive.page import=".BookDao"/>
<jsp:directive.page import="entity.BookBean"/>
<html>
<head>
<title>詳細內容</title>
</head>
<%
List<BookBean> list=(List<BookBean>)session.getAttribute("list");
int size=list.size();
int bookId=Integer.parseInt(request.getParameter("bookid"));
BookBean book=null;
int i=0;
while(i<size){
book=list.get(i);
if(bookId==book.getBookId())
{
session.setAttribute("bookToAdd",book);
break;
}
i++;
}
%>
<body>
<center>
<h1><font color="red">書名;<%=book.getBookName() %></font></h1>
<h2>價格:<%=book.getPrice() %></h2>
<h2>描述:<%=book.getDescription() %></h2>
<form action="/book/AddBookToCart" method="post">
<input type="submit" value="放入購物車" ></form><input type="button" name="button2" value="查看購物車" onClick="window.location.href='cart.jsp'">
</center>
</body>
</html>

㈨ 怎麼用java代碼來實現jsp網頁里的購物車里的模塊

購物車都是存在cookie里的，一般不登陸都是可以加入購物車的。加入購物車就寫到cookie里就ok了。

㈩ jsp購物車是怎麼實現的，請具體解釋下，不要代碼，要用自己的話說

其實很簡單，就是復每次選擇制了商品之後保存起來就可以了
頁面的話可以將商品id用ajax傳給後台，而頁面要保存一個map，key是當前登錄用戶，從session中得到，value則是個list，list存商品相關信息，包括數量，價格等。

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