本文介绍了一种利用Angular框架来实现购物车功能的方法。通过定义一个包含商品名称、价格等属性的产品数组，并借助Angular内置的指令实现了商品数量的增减及总价的实时更新。
<%@ 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>
<base href="<%=basePath%>">
<title>shopcart.</title>
<!-- 首先引入angular的插件-->
<script type="text/javascript" src="js/angular.min.js"></script>
<script type="text/javascript">
var app = angular.module("app",[]);
app.controller("AppController",["$scope",function($scope){
//定义一个数组
$scope.productList = [{name:"鼠标",price:50,num:1,myTotal:50}
,{name:"书包",price:150,num:1,myTotal:150}
,{name:"笔记本",price:5000,num:1,myTotal:5000}
];
$scope.total=function(){
//总数量
$scope.totalNum = 0;
//总价格
$scope.totalPrice = 0;
for(var i=0; i<$scope.productList.length; i++){
var product = $scope.productList[i];
$scope.totalNum += product.num;
$scope.totalPrice += product.num*product.price;
}
};
$scope.total();
//数量-1
$scope.del=function(index){
$scope.productList[index].num--;
$scope.total();
};
//数量+1
$scope.add=function(index){
$scope.productList[index].num++;
$scope.total();
};
}]);
</script>
</head>
<body ng-app="app" ng-controller="AppController">
<h1>购物车</h1>
<table border="1" style="background-color: brown">
<tr>
<td>商品名称</td>
<td>商品单价</td>
<td>商品数量</td>
<td>商品总价</td>
</tr>
<tr ng-repeat="p in productList">
<td>{{ p.name}}</td>
<td>{{p.price}}</td>
<td>
<button ng-click="del($index)">-</button>
<input type="text" ng-model="p.num"/>
<button ng-click="add($index)">+</button>
</td>
<td>{{p.price*p.num}}</td>
</tr>
<tr >
<td colspan="2"></td>
<td>{{totalNum}}</td>
<td>{{totalPrice}}</td>
</tr>
</table>
</body>
</html>
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