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jsp购物车代码

发布时间: 2021-01-01 03:08:27

㈠ 在JSP中怎样实现购物车计数

问题比较怪异~
既然都会做购物车了~那么计数又又什么难的？
无非都是统计数字专罢了~
如果是问的购物车中总共又属多少类商品，那么只要统计集合中又多少个商品对象就可以了，用count或者size方法（视你所用集合而定）
如果问的是每类商品有多少个，那么只要再再商品对象中加一个数量的属性就OK了，无论增加或减小商品数量也只要修改这个属性的值就可以~

㈡ 如何用java和jsp做一个简单的购物车

页面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>易买网-首页</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">
	您现在的位置：<ahref="Home">易买网</a>&gt;购物车
</div>
<divclass="wrap">
	<divid="shopping">
		<formaction=""method="post">
			<table>
				<tr>
					<th>商品名称</th>
					<th>商品价格</th>
					<th>购买数量</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}')">删除</a></td>
				</tr>
				</c:forEach>
			</table>
			<divclass="button"><inputtype="submit"value=""/></div>
		</form>
	</div>
</div>
<divid="footer">
	Copyright&;kaka292817678itjob远标培训.
</div>
</body>
</html>



页面关联的js 自己去网上下载一个jquery
/*数量减少*/
functionsub(id,proId){
	//购买数量的值
	varnum=$('#'+id).val();
	if(num>1){
		$('#'+id).val(num-1);
	}
	
	edit(id,proId);
	
}

functionedit(id,proId){
	varurl=contextPath+'/HomeCarManager'
	//修改后的数量，购物明细的商品的id
	num=$('#'+id).val();
	$.post(url,{"num":num,"proId":proId},function(msg){
		/*
		if(msg=='true'){
			alert('修改成功');
		}else{
			alert('修改失败');
		}*/
	});
}
/**
*数量增加
*@param{}id
*/
functionaddNum(id,proId){
	//购买数量的值
	varnum=$('#'+id).val();
	$('#'+id).val(parseInt(num)+1);	
	edit(id,proId);
}

/**
*删除购物明细
*/
functiondeleteItem(trId,proId){
	//
	//console.log($("#"+trId));
	//js删除页面节点
	//$("#"+trId).remove();
	varurl=contextPath+'/HomeCarManager'
	$.post(url,{"proId":proId},function(msg){
		if(msg=='true'){
			//js删除页面节点
			$("#"+trId).remove();
		}
	});
	
}



后台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;
/**
*购物车处理类
*@author@authorITJob远标培训
*
*/

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{
		//获取商品的id
		StringproId=req.getParameter("proId");
		resp.setContentType("text/html;charset=UTF-8");
		PrintWriterwriter=resp.getWriter();
		if(null!=proId&&!"".equals(proId)){
			//返回添加购物车成功
			//System.out.println("============="+proId);
			//根据商品的id查询商品
			try{
				IntegerpId=Integer.parseInt(proId);
				Proctproct=ps.findProctById(pId);
				if(null!=proct){
					//查询到了商品，将商品的相关参数构建一个购物明细放入到购物车
					Itemsit=newItems();
					it.setProId(proct.getProId());
					it.setProName(proct.getProName());
					it.setProPrice(proct.getProPrice());
					it.setProImg(proct.getProImg());
					
					//先判断session范围是否有购物车
					List<Items>shopCar=(List<Items>)req.getSession().getAttribute("shopCar");
					if(null==shopCar){
						//购物车
						shopCar=newArrayList<Items>();
					}
					//将商品加入到购物车之前，判断购物车中是否已经包含了该购物明细，如果包含了，只需要修改购买的数量
					if(shopCar.contains(it)){
						intindex=shopCar.indexOf(it);//寻找购物车中包含购物明细在购物车中位置
						Itemsitems=shopCar.get(index);//获取购物车中存在的购物明细
						items.setProNum(items.getProNum()+1);
					}else{
						shopCar.add(it);
					}
					
					
					//将购物车放入到session访问
					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);
	}
}



后台管理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;
/**
*购物车修改
*@authorITJob远标培训
*
*/

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();
		//获取参数
		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);
				
				//根据商品的id获取对应的明细项
				//先判断session范围是否有购物车
				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{
			//删除的操作
			try{
				IntegerpId=Integer.parseInt(proId);
				//根据商品的id获取对应的明细项
				//先判断session范围是否有购物车
				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和数据库做购物车，怎么能通过点击按钮把购买数量和商品信息传给购物车页面，急！！下面是部分代码

你把购买的数量和商品信息做成一个javabean，然后把这个javabean存在session里面，你点击按钮就向服务器端发出请求，然后服务器端处理请求后用jsp显示，这样就可以了呀

㈣ jsp+mysql购物车示例

通过这个方抄法request.getsession().setAttribute("cart",购物车的数据);放入，然后需要提取的时候就通过request.getsession().getAttribute("cart");得到数据，然后在往数据库里面插就好了。

㈤ Jsp写的购物车代码

这是其中的一段代码,要项目的话加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实现简单购物车功能的代码

修改下述的例子，增加web功能

（1）提供登录页面Login.jsp；
只需要登录名与密码（可在程序中硬编码）
（2）图书列表页面
列出所有可出售的图书供用户选择；
图书只需给出图书名（可在程序中硬编码）
（3）提供购物车商品的管理页面：
能够向购物车中添加图书（从图书列表中选择）；
能够删除购物车中的图书；
能够察看购物车中的图书信息
（4）用户可主动退出系统

一个EJB例子如下（购物车）
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("不允许没有用户！");
} else {
customerName = person;
}
customerId = "0";
contents = new ArrayList<String>();
}

public void initialize(String person, String id)
throws BookException {
if (person == null) {
throw new BookException("不允许没有用户！");
} else {
customerName = person;
}
IdVerifier idChecker = new IdVerifier();
if (idChecker.validate(id)) {
customerId = id;
} else {
throw new BookException("无效的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 + " 不在购物车中。");
}
}
public List<String> getContents() {
return contents;
}
@Remove()
public void remove() {
contents = null;
}
}

㈦ jsp购物车的代码和数据库

//购物车类ShoppingCart，仅供参考
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";//改动
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;
}
}
//图书信息类，ShoppingCartItem
packagebookshop;
publicclassShoppingCartItem{
publicStringbookID=null;
publicStringisbn=null;
publicStringbookName=null;
publicfloatprice=0.0F;
publicStringdescription=null;
publicStringbookImage=null;
publicStringauthor=null;
publicStringcategoryID=null;
publicintquantity;
}

㈧ 求修改或者给我JSP购物车代码

看看，能不能帮你：

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<jsp:directive.page import=".BookDao"/>
<jsp:directive.page import="entity.BookBean"/>
<html>
<head>
<title>详细内容</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">书名;<%=book.getBookName() %></font></h1>
<h2>价格:<%=book.getPrice() %></h2>
<h2>描述:<%=book.getDescription() %></h2>
<form action="/book/AddBookToCart" method="post">
<input type="submit" value="放入购物车" ></form><input type="button" name="button2" value="查看购物车" onClick="window.location.href='cart.jsp'">
</center>
</body>
</html>

㈨ 怎么用java代码来实现jsp网页里的购物车里的模块

购物车都是存在cookie里的，一般不登陆都是可以加入购物车的。加入购物车就写到cookie里就ok了。

㈩ jsp购物车是怎么实现的，请具体解释下，不要代码，要用自己的话说

其实很简单，就是复每次选择制了商品之后保存起来就可以了
页面的话可以将商品id用ajax传给后台，而页面要保存一个map，key是当前登录用户，从session中得到，value则是个list，list存商品相关信息，包括数量，价格等。

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