jsp购物车代码(jsp网上购物代码及操作!)

编程之家2023-11-0399次浏览

亲爱的读者们，你是否对jsp购物车代码和jsp网上购物代码及操作!的相关问题感到困惑？别担心，今天我将为你解答这些问题，让你对此有更清晰的认识。

怎么用jsp的session对象编写购物车

肯定需要用javabean啊，如果要购买的话就把这个物存入到map类型的cart里面，再调用session.setAttribute方法把hashmap类型的cart放到session里面，然后在购物车那个页面取出购物车里的东西就行了，

DiscBean bean=data.getItem(itemid);这是选中物品的id

得到session对象

HttpSession session= request.getSession();

得到map类型的购物车

Map car=(Map)session.getAttribute("car");

if(car==null){

car=new HashMap();

session.setAttribute("car", car);

}

Set set=car.keySet();得到键的集合

Object[] bea=set.toArray();

boolean isNewDisc= true;

for(Object object: bea){

DiscItem discitem=(DiscItem)car.get(object);

String discitemid= discitem.getDiscBean().getItemID();

if(itemid.equals(discitemid)){

isNewDisc= false;

discitem.setNumber(discitem.getNumber()+1);

break;

}

if(isNewDisc){

car.put(itemid, new DiscItem(bean,1));

}

这个例子就是说我添加一本书的信息，如果是已经在购物车里了，就更新它的数量，如果没在购物车里，就把这个bean保存到购物车，并且数量设为一

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"/>

<linktype="text/css"rel="stylesheet"rel="external nofollow" 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：<arel="external nofollow" href="Home">易买网</a>>购物车

</div>

<divclass="wrap">

<divid="shopping">

<formaction=""method="post">

<table>

<tr>

</tr>

<c:forEachitems="${sessionScope.shopCar}"var="item"varStatus="status">

<trid="product_id_${item.proId}">

<tdclass="thumb"><imgsrc="${item.proImg}"height="50"width="30"/><arel="external nofollow" href="Product?action=view&entityId=${item.proId}">${item.proName}</a></td>

<tdclass="price"id="price_id_1">

<inputtype="hidden"value="${item.proPrice}"/>

</td>

<tdclass="number">

<dl>

</dl>

</td>

<tdclass="delete"><arel="external nofollow" href="javascript:deleteItem('product_id_${item.proId}','${item.proId}')">删除</a></td>

</tr>

</c:forEach>

</table>

<divclass="button"><inputtype="submit"value=""/></div>

</form>

</div>

<divid="footer">

</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.Product;

importcom.kaka.service.ProductService;

importcom.kaka.service.impl.ProductServiceImpl;

publicclassHomeCarextendsHttpServlet{

privatestaticfinallongserialVersionUID=1L;

ProductServiceps=newProductServiceImpl();

@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);

Productproduct=ps.findProductById(pId);

if(null!=product){

//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(product.getProId());

it.setProName(product.getProName());

it.setProPrice(product.getProPrice());

it.setProImg(product.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.Product;

importcom.kaka.service.ProductService;

importcom.kaka.service.impl.ProductServiceImpl;

publicclassHomeCarManagerextendsHttpServlet{

privatestaticfinallongserialVersionUID=1L;

ProductServiceps=newProductServiceImpl();

@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);

}

jsp网上购物代码及操作!

1.index.jsp登陆界面：

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>

String path= request.getContextPath();

String basePath= request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<%session.invalidate();%><%--销毁所有session对象--%>

<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<!--

-->

</head>

<body>

<hr>

请输入用户名，默认的为Guest

</tr>

</tr>

</tr>

</tr>

</table>

</form>

</center>

</body>

</html>

2.checklogin.jsp登陆认证页面：

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>

String path= request.getContextPath();

String basePath= request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<jsp:useBean id="Car" class="web.Car" scope="session">

<jsp:setProperty property="*" name="Car"/>

</jsp:useBean>

<%session.setMaxInactiveInterval(900);%><%--设置session超时为30分--%>

<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP'checklogin.jsp' starting page</title>

<!--

-->

</head>

<body>

String nextpage;

if(Car.getUserID().equals("Guest"))

nextpage="car.jsp";

else

nextpage="index.jsp";

<jsp:forward page="<%=nextpage%>"></jsp:forward>

</body>

</html>

3.car.jsp购物车页面

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>

String path= request.getContextPath();

String basePath= request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<%@ page import="java.util.*"%>

<%@ page import="web.Car"%>

<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<!--

-->

</head>

<body>

<hr>

<jsp:useBean id="Car" class="web.Car" scope="session">

</jsp:useBean>

<strong>百货商场，请尽情的选购商品添加到购物车！</strong>

</font>

<%String str=response.encodeRedirectURL("add.jsp");%>

<form action="<%=str%>" method="post" name="form">

</select>

输入购买的数量：

</font>

<p>

<input type="radio" name="unit" value="个">个

<input type="radio" name="unit" value="公斤">公斤

<input type="radio" name="unit" value="台">台

</form>

<p><font color="#804040" face="楷体_GB2312">你的购物车里有如下商品：</font>

Hashtable list=Car.list_h();

Enumeration enums=list.elements();

while(enums.hasMoreElements()){

String goods=(String) enums.nextElement();

byte b[]=goods.getBytes("ISO-8859-1");

goods=new String(b);

out.println("<br>"+goods);

}

</font>

<% String strl=response.encodeRedirectURL("selectRemoveGoods.jsp");%>

<form action="<%=strl%>" method="post" name="form">

</form>

</font>

<%@ include file="tail.jsp"%>

</body>

</html>

4.add.jsp增加物品：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

String path= request.getContextPath();

String basePath= request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<!--

-->

</head>

<body>

<%@ include file="header.jsp"%>

<hr>

<jsp:useBean id="Car" class="web.Car" scope="session"></jsp:useBean><br>

<jsp:setProperty name="Car" property="*"/>

<%Car.add_h();%>

<p>您的购物车有如下商品：

Hashtable list=Car.list_h();

Enumeration enums=list.elements();

while(enums.hasMoreElements()){

String goods=(String) enums.nextElement();

byte b[]=goods.getBytes("ISO-8859-1");

goods=new String(b);

out.println("<br>"+goods);

}

</font>

<%String str=response.encodeRedirectURL("car.jsp");%>

<br>

<form action="<%=str%>" method="post" neme="form">

</form>

<%String strl=response.encodeRedirectURL("selectRemoveGoods.jsp");%>

<br>

<form action="<%=strl%>" method="post" neme="form">

</form>

</font>

<%@ include file="tail.jsp"%>

</body>

</html>

5.selectRemoveGoods.jsp选择删除商品：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

String path= request.getContextPath();

String basePath= request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<%@ page import="java.util.*"%>

<%@ page import="web.Car"%>

<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<!--

-->

</head>

<body>

<hr>

<jsp:useBean id="Car" class="web.Car" scope="session">

</jsp:useBean><br>

<p>选择从购物车中删除的物品：

<%String str=response.encodeRedirectURL("removeWork.jsp");%>

<form action="<%=str%>" method="post" name="form">

</select>

</form>

<p>您的购物车有如下商品：

Hashtable list=Car.list_h();

Enumeration enums=list.elements();

while(enums.hasMoreElements()){

String goods=(String) enums.nextElement();

byte b[]=goods.getBytes("ISO-8859-1");

goods=new String(b);

out.println("<br>"+goods);

}

</font></font>

<%String strl=response.encodeRedirectURL("car.jsp");%>

<form action="<%=strl%>" method="post" neme="form">

</form>

<%@include file="tail.jsp"%>

</body>

</html>

6.removeWork.jsp删除页面：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

String path= request.getContextPath();

String basePath= request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<%@ page import="java.util.*"%>

<%@ page import="web.Car"%>

<!DOCTYPE HTML PUBLIC"-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<!--

-->

</head>

<body>

<%@include file="header.jsp"%>

<hr>

<jsp:useBean id="Car" class="web.Car" scope="session">

</jsp:useBean><br>

<%String str=response.encodeRedirectURL("removeWork.jsp");%>

<%String name=request.getParameter("deleteitem");

if(name==null)

name="";

byte c[]=name.getBytes("ISO-8859-1");

name=new String(c);

Car.dele_h(name);

out.println("您删除了货物"+name);%>

</font>

<p>您的购物车有如下商品：

Hashtable list=Car.list_h();

Enumeration enums=list.elements();

while(enums.hasMoreElements()){

String goods=(String) enums.nextElement();

byte b[]=goods.getBytes("ISO-8859-1");

goods=new String(b);

out.println("<br>"+goods);

}

</font></font>

<%String strp=response.encodeRedirectURL("car.jsp");%>

<form action="<%=strp%>" method="post" neme="form">

</form>

<%String strl=response.encodeRedirectURL("selectRemoveGoods.jsp");%>

<form action="<%=strl%>" method="post" neme="form">

</form>

</body>

</html>

7.header.jsp页面头部：

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>

========================================================================<br>

购物车系统<br>

=======================================================================<br>

WELCOME！

<jsp:getProperty name="Car" property="userID"/>

当前时间是：

<%=new java.util.Date().toLocaleString()%>

<br>

</center>

8.tail页面尾部

<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>

<hr>

JSP+TOMCAT购物系统

</center>

9.Car.java类

package web;

import java.util.*;

import java.io.*;

public class Car implements Serializable{

Hashtable list=new Hashtable();//散列表，商品列表

String item="Welcome";

int mount=0;//商品数量

String unit=null;//商品单位

String userID;//用户

public void Car(){

}

public void setItem(String item){

this.item= item;

}

public void setMount(int mount){

this.mount= mount;

}

public void setUnit(String unit){

this.unit= unit;

}

public String getUserID(){

return userID;

}

public void setUserID(String userID){

this.userID= userID;

}

public Hashtable list_h(){

return list;

}

public void dele_h(String s){

list.remove(s);

}

public void add_h(){

String str="Name:"+item+"Mount:"+mount+"Unit:"+unit;

list.put(item, str);

}

好了，文章到此结束，希望可以帮助到大家。

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