JS文件
var num_jia;
var num_jian;
var input_num;
var total;
var each;
function a(cid) {
var jia="num-jia"+cid;
num_jia = document.getElementById(jia);
num_jian = document.getElementById("num-jian"+cid);
input_num = document.getElementById("input-num"+cid);
total=document.getElementById("total"+cid);
each=document.getElementById("each"+cid);
}
/*数量加法*/
function b(cid) {
a(cid);
input_num.value = parseInt(input_num.value) + 1;
total.innerHTML=parseInt(input_num.value)*parseInt(each.innerHTML);
}
/*数量减法*/
function c(cid){
/*alert(cid);*/
a(cid);
if(input_num.value <= 0) {
input_num.value = 0;
} else {
input_num.value = parseInt(input_num.value) - 1;
total.innerHTML=parseInt(input_num.value)*parseInt(each.innerHTML);
}
}
//显示默认总价格
window.onload=function (){
for(i=0;i<30;i++){
total=document.getElementById("total"+i);
input_num = document.getElementById("input-num"+i);
each=document.getElementById("each"+i);
if(total!=null){
total.innerHTML=parseInt(input_num.value)*parseInt(each.innerHTML);
}
}
}JSP文件
<%--
Created by IntelliJ IDEA.
User: soft
Date: 2019/9/5
Time: 16:11
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>购物车界面</title>
<link rel="stylesheet" href="CSS/goodsBuy.css" />
<script src="http://localhost:8080/JS/GoodsBuy.js"></script>
</head>
<body>
<span>当前用户是:${sessionname}</span>
<div class="a">
<h1 style="text-align: center">商品展示</h1>
<hr>
</div>
<div class="mainNavigation">
<ul>
<li><a href="/selectGoods.do">商品展示</a></li>
<li><a href="/selectGoodsView.do">商品详情</a></li>
<li><a href="/selectGoodsViewSuccess.do">购物车</a></li>
<li><a href="/selectGoods.do">订单确认</a></li>
<li><a href="/selectGoods.do">结算</a></li>
</ul>
</div>
<div>
<table>
<thead>
<tr>
<td>
<input type="checkbox" /> 全选
</td>
<td colspan="2">
商品
</td>
<td>
数量
</td>
<td>
单价
</td>
<td>
小计
</td>
<td>
操作
</td>
</tr>
</thead>
<tbody>
<c:forEach items="${Carts}" var="cart" varStatus="status">
<tr>
<td>
<input type="checkbox" />
</td>
<td>
${cart.goodspublisher}
</td>
</tr>
<tr>
<td>
<input type="checkbox"/>
</td>
<td>
<%--<img src="/images/31.jpg">--%>
<img src=${cart.imageurl}>
</td>
<td>
${cart.goodsname}
</td>
<td>
<%-- ${status.count}--%>
<ul class="btn-numbox">
<li><span id="num-jian${status.count}" class="num-jian" onclick="c(${status.count})">-</span></li>
<li><input type="text" class="input-num" id="input-num${status.count}" value="1" /></li>
<li><span id="num-jia${status.count}" class="num-jia" onclick="b(${status.count})">+</span></li>
</ul>
</td>
<td>
<span id="each${status.count}">${cart.unitprice}</span>
</td>
<td>
<span id="total${status.count}">0</span>
</td>
<td>
<a href="/GoodsBuydel.do?del=${cart.id}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<hr>
<div>
<span>你的商品共2两件</span><span>总价共：98元</span><span><input type="button" value="去结算"></span>
</div>
</div>
</body>
</html>Controller中的方法
@RequestMapping("/GoodsBuy.do")
public String GoodsBuy(Carts carts, Model model, HttpServletRequest request){
/* String uid=request.getParameter("userid");
String pid=request.getParameter("pid");*/
/*插入到购物车表中*/
cartsService.addCarts(carts);
/*查询当前用户的购物车*/
int a=carts.getUserid();
List<Carts> carts1= cartsService.selectCartByUserid(a);
List<SelectCarts> list=new ArrayList<SelectCarts>();
for (int i = 0; i < carts1.size(); i++){
Carts c=(Carts)carts1.get(i);
int b= c.getPid();
SelectCarts selectCarts=selectCartService.selectCarts(b);
list.add(selectCarts);
}
model.addAttribute("Carts",list);
return "GoodsBuy";
}其他方法略。
