run as时只有run configurations

package com.homework;

public class Goods {

private String goodsId;

private String goodsNamde;

private double price;

private String goodsDesp; //描述

//构造方法

public Goods() {

}

public Goods(String goodsId, String goodsNamde, double price, String goodsDesp) {

super();

this.goodsId = goodsId;

this.goodsNamde = goodsNamde;

this.price = price;

this.goodsDesp = goodsDesp;

}

// get set

public String getGoodsId() {

return goodsId;

}

public void setGoodsId(String goodsId) {

this.goodsId = goodsId;

}

public String getGoodsNamde() {

return goodsNamde;

}

public void setGoodsNamde(String goodsNamde) {

this.goodsNamde = goodsNamde;

}

public double getPrice() {

return price;

}

public void setPrice(double price) {

this.price = price;

}

public String getGoodsDesp() {

return goodsDesp;

}

public void setGoodsDesp(String goodsDesp) {

this.goodsDesp = goodsDesp;

}

// hashCode

@Override

public int hashCode() {

final int prime = 31;

int result = 1;

result = prime * result + ((goodsDesp == null) ? 0 : goodsDesp.hashCode());

result = prime * result + ((goodsId == null) ? 0 : goodsId.hashCode());

result = prime * result + ((goodsNamde == null) ? 0 : goodsNamde.hashCode());

long temp;

temp = Double.doubleToLongBits(price);

result = prime * result + (int) (temp ^ (temp >>> 32));

return result;

}

@Override

public boolean equals(Object obj) {

if (this == obj)

return true;

if (obj == null)

return false;

if (getClass() != obj.getClass())

return false;

Goods other = (Goods) obj;

if (goodsDesp == null) {

if (other.goodsDesp != null)

return false;

} else if (!goodsDesp.equals(other.goodsDesp))

return false;

if (goodsId == null) {

if (other.goodsId != null)

return false;

} else if (!goodsId.equals(other.goodsId))

return false;

if (goodsNamde == null) {

if (other.goodsNamde != null)

return false;

} else if (!goodsNamde.equals(other.goodsNamde))

return false;

if (Double.doubleToLongBits(price) != Double.doubleToLongBits(other.price))

return false;

return true;

}

//toString

@Override

public String toString() {

return "商品信息 [编号=" + goodsId + ", 名称=" + goodsNamde + ", 价格=" + price + ", 描述="

+ goodsDesp + "]";

}

}

package com.homework;

public class GoodsInCart {

private Goods goods;

private int num;

public GoodsInCart(Goods goods, int num) {

super();

this.goods = goods;

this.num = num;

}

public GoodsInCart() {

}

public Goods getGoods() {

return goods;

}

public void setGoods(Goods goods) {

this.goods = goods;

}

public int getNum() {

return num;

}

public void setNum(int num) {

this.num = num;

}

}

package com.homework;

import java.util.HashSet;

import java.util.Iterator;

import java.util.Set;

public class GoodsManage {

private Set goodsSet; //容器

public GoodsManage() {

}

public GoodsManage(Set goodsSet) {

this.goodsSet = goodsSet;

}

public Set getGoodsSet() {

return goodsSet;

}

public void setGoodsSet(Set goodsSet) {

this.goodsSet = goodsSet;

}

Set<Goods> set=new HashSet<Goods>();

//商品信息导入方法

public void importGoods() {

Goods goods1=new Goods("goods001","水杯",56,"不锈钢水杯");

        Goods goods2=new Goods("goods002","饮水机",299,"带净化功能的饮水机");

        Goods goods3=new Goods("goods003","笔记本电脑",4999,"15寸笔记本电脑");

        Goods goods4=new Goods("goods004","手机",2300,"android手机");

        set.add(goods1);

        set.add(goods2);

        set.add(goods3);

        set.add(goods4);

        System.out.println("商品导入成功!");

}

//显示所有商品信息

public void displayAllGoods() {

Iterator<Goods> it=set.iterator();

while(it.hasNext()) {

System.out.println(it.next());

}

}

}

package com.homework;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Scanner;

import java.util.Set;

public class ShoppingCart {

private Map<String,GoodsInCart> shoppingCart;

public ShoppingCart() {

}

public ShoppingCart(Map<String, GoodsInCart> shoppingCart) {

super();

this.shoppingCart = shoppingCart;

}

public Map<String, GoodsInCart> getShoppingCart() {

return shoppingCart;

}

public void setShoppingCart(Map<String, GoodsInCart> shoppingCart) {

this.shoppingCart = shoppingCart;

}

//添加商品到购物车

public void addGoodsToCart(GoodsManage gm) {

Scanner console=new Scanner(System.in);

System.out.println("请输入要添加商品的编号：");

String goodsId=console.next();

System.out.println("请输入要添加商品的数量：");

int num=console.nextInt();

//构建迭代器查询与待添加商品编号相同的商品

Iterator<Goods> it=gm.getGoodsSet().iterator();//容器放入迭代器中

while(it.hasNext()) {

if(it.next().getGoodsId().equals(goodsId)) {

GoodsInCart goodsInCart=new GoodsInCart(it.next(),num);//添加到购物车中

shoppingCart.put(goodsId, goodsInCart); //添加都购物车的map集合

                break;

}

}

}

//修改购物车的商品数量

public void updateNumInCart() {

Scanner console=new Scanner(System.in);

System.out.println("请输入要修改的商品编号:");

String goodsId=console.next();

System.out.println("请输入新的商品数量");

int newNum=console.nextInt();

Set <Entry<String,GoodsInCart>>entry=shoppingCart.entrySet();

Iterator <Entry<String,GoodsInCart>>it=entry.iterator();

while(it.hasNext()) {

if(it.next().getValue().getGoods().getGoodsId().equals(goodsId)) {

if(newNum==0) {

System.out.println("因为商品数量为0，该商品已经从购物车上移除！");

}

it.next().getValue().setNum(newNum);

}

}

 }

//显示购物车中的所有商品

public void displayAllInCart() {

if(shoppingCart!=null) {

Iterator <Entry<String,GoodsInCart>>it=shoppingCart.entrySet().iterator();

while(it.hasNext()) {

System.out.println(it.next().getValue().getGoods()+",数量:"+it.next().getValue().getNum());

}

}else {

System.out.println("购物车是空的");

}

}

//结算

public void settleAccounts() {

System.out.println("结算");

double sum=0.0;

Set<Entry<String,GoodsInCart>> entrySet=shoppingCart.entrySet();

for(Entry<String,GoodsInCart> entry:entrySet) {

sum+=entry.getValue().getNum()*entry.getValue().getGoods().getPrice();

}

System.out.println("商品的总价为"+sum);

displayAllInCart();

entrySet.removeAll(entrySet);

}

}

package com.homework;

import java.util.Scanner;

public class TestDemo {

public  void mianMenu() {

System.out.println("*****************************");

     System.out.println("          **主菜单**         ");

     System.out.println("          1--商品管理               ");

     System.out.println("          2--购物车                  ");

     System.out.println("          0--退出                     ");

     System.out.println("*****************************");

     System.out.println("请输入对应的数字进行操作：");

    }

public  void goodsManageMenu() {

        /*

         * 商品管理菜单

         */    

        System.out.println("******************************************");

        System.out.println("                 **商品管理**              ");

        System.out.println("              1--商品信息导入                          ");

        System.out.println("              2--显示所有商品信息                   ");

        System.out.println("              9--返回上一级菜单                      ");

        System.out.println("******************************************");

        System.out.println("请输入对应的数字对商品进行管理：");

}

public  void shoppingCartManagementMenu() {

        /*

         * 购物车管理菜单

         */   

        System.out.println("****************************************************");

        System.out.println("                 **购物车管理**                      ");

        System.out.println("              1--添加商品到购物车                                     ");

        System.out.println("              2--修改购物车中的商品数量                           ");

        System.out.println("              3--显示购物车中的所有商品信息                    ");

        System.out.println("              4--结算                                                        ");

        System.out.println("              9--返回上一级菜单                                        ");

        System.out.println("****************************************************");

        System.out.println("请输入对应的数字对购物车进行管理：");

}

static GoodsManage gm = new GoodsManage();

static ShoppingCart cart = new ShoppingCart();

public static void mian(String[]args) {

System.out.println("000");

Scanner sc = new Scanner(System.in); 

boolean flag = true;

TestDemo test = new TestDemo();  

while (flag) {

test.mianMenu();

int num = sc.nextInt();

if (num == 1) {

boolean f1 = true;

while (f1) {

     test.mianMenu();

     int m = sc.nextInt();

   switch(m) {

   case 1:

   gm.importGoods();// 导入商品信息

   continue;

   case 2:

     gm.displayAllGoods();// 显示所有商品信息

     continue;

    case 9:

     f1 = false;

     continue;

     default:

     System.out.println("输入错误数字，请重新输入！");

     m = sc.nextInt();

     continue;

     }

}

}

if(num==2) {

boolean f2 = true;

while (f2) {

test.shoppingCartManagementMenu();

int n=sc.nextInt();

switch(n) {

case 1:

cart.addGoodsToCart(gm);

continue;

case 2:

cart.updateNumInCart();

continue;

case 3:

cart.displayAllInCart();

continue;

case 4:

cart.settleAccounts();

continue;

case 9:

f2=false;

continue;

default :

System.out.println("输入错误数字，请重新输入！");

n=sc.nextInt();

continue;

}

}

}

if(num==0) {

flag=false;

System.out.println("结束！");

break;

}else {

System.out.println("输入错误，请重新输入！");

}

}

}

}