JAVA购物车
小组成员
| 班级 | 成员 | 成员 | 成员 | 成员 |
| ---- | ---- | ---- | ---- | ---- | ---- |
| 网络1912 | 吴奕恒 | 蔡浩伟 | 朱韶华 | 郑剑龙 |
小组分工
-
1.吴奕恒：前期调查，登录注册.商城代码实现
-
2.蔡浩伟：Dao模式，面向对象设计，GUI
-
3.郑剑龙：UML类图，代码实现
-
4.朱韶华：博客制作，代码规范
一.前期调查
1.主页面信息
观察：主界面显示商品的分类，并且分类里含有各种商品的信息，使得购物者能一目了然了解到该商城所拥有的所有的商品的信息。
系统功能结构图
2.商品展示
观察：当进入到该商城或者该搜索信息的商品展示，该条目应该含有各种各样的商品信息以及产地之类的东西，还必须含有单价，使得购物者能够根据物品的信息来了解并且购买
3.购物车界面
观察：购物车包含了所有购物者选择将进行购买的商品，购物者可以自行挑选某几个选中的物品进行结算，而购物车里也必须含有商品相对于的信息；
商品的数量应该可在购物车里面进行添加和减少，并且可以在购物车里删除不想购买的物品，移除购物车。最后购物者选择完毕进行结算即可，并且结算后购物车内的该物品应该去除。
二.流程图
三.UML类图
四.效果展示
1.登录界面
2.商品界面
3.购物车功能
4.添加商品，删除商品且清空购物车
添加
删除
清空
5.结算
五.购物车核心代码
1.DAO展示
- 购物车DAO
package shoppingcart;
import java.util.ArrayList;
public interface CartDao{
public List getList();
public void addGoods(Goods goods); //加入购物车
public void deleteGoods(int num); //删除购物车
public void showCart(); //查看购物车
public void clearCart(); //清空购物车
public double checkList(); //计算购物车内商品总价
}
2.用户注册，用户登录
package shoppingcart;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
import java.util.StringTokenizer;
public class User {
public void registered() {
Scanner scan=new Scanner(System.in);
System.out.println("请输入您的手机号注册：");
String iname=scan.next();
System.out.println("请输入您的密码：");
String ipassword=scan.next();
File file=new File("C:\\1.txt");
try {
FileWriter writer = new FileWriter(file, true);
writer.write("\r\n"+iname+" "+ipassword);
writer.close();
} catch (Exception ex) {
ex.printStackTrace();
ex.getMessage();
}
}
//登陆
public int login() throws IOException {
Scanner scan=new Scanner(System.in);
System.out.println("请输入您的用户名/手机号");
String iname=scan.next();
System.out.println("请输入您的密码：");
String ipassword=scan.next();
int flag=1;
BufferedReader in = new BufferedReader(new FileReader("C:\\1.txt"));
String s;
s = in.readLine();
while ((s = in.readLine()) != null) {
StringTokenizer p = new StringTokenizer(s, " ");
String name=p.nextToken();
String pass=p.nextToken();
if(iname.equals(name))
{
System.out.println("登录成功！");
flag=0;
break;
}
}
if(flag==1)
{
System.out.println("用户名或密码输入错误！");
}
return flag;
}
}
3.商城展示
package shoppingcart;
import java.io.BufferedReader;//读取文本
import java.io.FileReader;//读取文件
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;//分割字符串
public class Mall {
static List<Goods>mallList = new ArrayList<>();
public static list<Goods> getList() {
return mallList;
}
public static void showAllGoods() throws NumberFormatException, IOException//抛出异常？
{
BufferedReader in = new BufferedReader(new FileReader("C:\\goods.txt"));
String s;
Goods goods;
int i=1;
while ((s = in.readLine()) != null)
{
StringTokenizer p = new StringTokenizer(s, " ");// " "为分隔符
String goodsName=p.nextToken();// 将第一个记录赋给变量goodsName
String goodsPrice=p.nextToken();// 将第二个记录赋给变量goodsPrice
String goodsType=p.nextToken();// 将第三个记录赋给变量goodType
String goodsOrigin=p.nextToken();// 将第四个记录赋给变量goodsOrigin
if(i<=5)
{
String phoneRam=p.nextToken();
String phoneColor=p.nextToken();
goods=new Phone(goodsName,goodsPrice,goodsType,goodsOrigin,phoneRam,phoneColor);
mallList.add(goods);
System.out.println(i+":"+goods.toString());
i++;
}
else if(i>5&&i<=12)
{
String shoeSize=p.nextToken();
String shoeCharacteristic=p.nextToken();
goods=new Shoe(goodsName,goodsPrice,goodsType,goodsOrigin,shoeSize,shoeCharacteristic);
mallList.add(goods);
System.out.println(i+":"+goods.toString());
i++;
}
else if(i>12&&i<=19)
{
String bookAuthor=p.nextToken();
goods=new Books(goodsName,goodsPrice,goodsType,goodsOrigin,bookAuthor);
mallList.add(goods);
System.out.println(i+":"+goods.toString());
i++;
}
else if(i>19)
{
String cosmeticsType=p.nextToken();
goods=new Cosmetics(goodsName,goodsPrice,goodsType,goodsOrigin,cosmeticsType);
mallList.add(goods);
System.out.println(i+":"+goods.toString());
i++;
}
}
in.close();
}
}
4.商品类的处理
- 1.主要子类有：手机，鞋，书籍，化妆品
package shoppingcart;
public class Goods {
private String goodsName; //商品名称
private String goodsPrice; //商品价格
private String goodsType; //商品类型
private String goodsOrigin; //产地
public goods() {
}
public goods(String goodsName,String goodsPrice,String goodsType,String goodsOrigin) {
this.goodsName = goodsName;
this.goodsPrice = goodsPrice;
this.goodsType = goodsType;
this.goodsOrigin = goodsOrigin;
}
@Override
public String toString() {
return goodsName + " " + goodsPrice + " " + goodsType
+ " " + goodsOrigin;
}
// setter/getter
public String getGoodsName() {
return goodsName;
}
public void setGoodsName(String goodsName) {
this.goodsName = goodsName;
}
public String getGoodsPrice() {
return goodsPrice;
}
public void setGoodsPrice(String goodsPrice) {
this.goodsPrice = goodsPrice;
}
String getGoodsType() {
return goodsType;
}
public void setGoodsType(String goodsType) {
this.goodsType = goodsType;
}
public String getGoodsOrigin() {
return goodsOrigin;
}
public void setGoodsOrigin(String goodsOrigin) {
this.goodsOrigin = goodsOrigin;
}
}
//手机类
class phone extends Goods{
private String ram; //内存
private String color; //颜色
public phone(String goodsName, String goodsPrice, String goodsType, String goodsOrigin, String ram, String color) {
this.setGoodsName(goodsName);
this.setGoodsPrice(goodsPrice);
this.setGoodsType(goodsType);
this.setGoodsOrigin(goodsOrigin);
this.ram=ram;
this.color=color;
}
public String getRam() {
return ram;
}
public void setRam(String ram) {
this.ram = ram;
}
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
@Override
public String toString() {
return this.getGoodsName() + " 价格：" + this.getGoodsPrice() + " 商品类型：" + this.getGoodsType()
+ " 商品产地：" + this.getGoodsOrigin() + " 手机内存：" + ram + " 手机颜色："+ color;
}
}
//鞋类
class shoe extends Goods{
private String size; //尺码
private String characteristic; //特性
public shoe(String goodsName, String goodsPrice, String goodsType, String goodsOrigin, String size, String characteristic) {
this.setGoodsName(goodsName);
this.setGoodsPrice(goodsPrice);
this.setGoodsType(goodsType);
this.setGoodsOrigin(goodsOrigin);
this.size=size;
this.characteristic=characteristic;
}
public String getSize() {
return size;
}
public void setSize(String size) {
this.size = size;
}
public String getCharacteristic() {
return characteristic;
}
public void setCharacteristic(String characteristic) {
this.characteristic = characteristic;
}
@Override
public String toString() {
return this.getGoodsName() + " 价格：" + this.getGoodsPrice() + " 商品类型：" + this.getGoodsType()
+ " 商品产地：" + this.getGoodsOrigin() + " 尺码大小：" + size + " 商品特性："+ characteristic;
}
}
//书籍类
class books extends Goods{
private String author; //作者
public books(String goodsName, String goodsPrice, String goodsType, String goodsOrigin, String author) {
this.setGoodsName(goodsName);
this.setGoodsPrice(goodsPrice);
this.setGoodsType(goodsType);
this.setGoodsOrigin(goodsOrigin);
this.author=author;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
@Override
public String toString() {
return this.getGoodsName() + " 价格：" + this.getGoodsPrice() + " 商品类型：" + this.getGoodsType()
+ " 商品产地：" + this.getGoodsOrigin() + " 作者：" + author;
}
}
//化妆品类
class cosmetics extends Goods{
private String c_type;
public cosmetics(String goodsName, String goodsPrice, String goodsType, String goodsOrigin, String c_type) {
this.setGoodsName(goodsName);
this.setGoodsPrice(goodsPrice);
this.setGoodsType(goodsType);
this.setGoodsOrigin(goodsOrigin);
this.c_type=c_type;
}
public String getC_type() {
return c_type;
}
public void setC_type(String c_type) {
this.c_type = c_type;
}
@Override
public String toString() {
return this.getGoodsName() + " 价格：" + this.getGoodsPrice() + " 商品类型：" + this.getGoodsType()
+ " 商品产地：" + this.getGoodsOrigin() + " 商品特性：" + c_type;
}
}
5.购物车的处理：查看购物车，添加商品个数，删除商品，清空购物车，结算购物车
package shoppingcart;
import java.util.ArrayList;
public class CartDaoLisImpl implements CartDao{
List cartList= new List();
public List getList() {
return cartList;
}
public void addGoods(Goods goods)
{
int i;
for(i=0;i<cartList.size();i++)
{
if(cartList.get(i).getItem().equals(goods)==true)
{
cartList.get(i).increase();
break;
}
}
if(i>=cartList.size())
{
Item e = new Item(goods);
cartList.add(e);
}
}
public void deleteGoods(int num)
{
if(cartList.size()==0)
{
System.out.println("购物车为空");
return;
}
if(num<cartList.size())
{
if(cartList.get(num).getNum()==1)
{
cartList.remove(num);
}
else
{
cartList.get(num).reduce();
}
}
if(num>cartList.size())
{
System.out.println("该商品编号不存在");
}
}
public void showCart() //查看购物车
{
for(int i=0;i<cartList.size();i++)
{
System.out.println((i+1)+":"+cartList.get(i).toString());
}
}
public void clearCart() //清空购物车
{
cartList.clear();
}
public double checkList() { //计算购物车内商品总价
double cost=0;
for(int i=0;i<cartList.size();i++)
{
cost=cost+Double.parseDouble(cartList.get(i).getItem().getGoodsPrice())*cartList.get(i).getNum();
}
return cost;
}
}
class item
{
private Goods item; //商品的信息
private int num; //商品的数量
public item(Goods item)
{
this.item = item;
num = 1;
}
public void increase() //增加商品数量
{
num++;
}
public void reduce() //减少商品数量
{
num--;
}
@Override
public String toString() {
return item + " 数量：" + num;
}
public Goods getItem() {
return item;
}
public void setItem(Goods item) {
this.item = item;
}
public int getNum() {
return num;
}
public void setNum(int num) {
this.num = num;
}
}
