商品信息管理系统.zip

package com.wang.han; import java.util.Scanner; public class Shopping{ private Goods[] goods=new Goods[5]; private int index; public Goods[] find(){ Goods[] demo=new Goods[index]; System.arraycopy(goods,0,demo,0,index); return demo; } public void save(Goods good){ if (index>=goods.length){ Goods[] demo=new Goods[goods.length+5]; System.arraycopy(goods,0,demo,0,index); goods=demo; } goods[index++]=good; } public Goods findByName(String name,String size){ int num=getindexByName(name,size); return num==-1?null:goods[num]; } public int findAmount(String name,String size){ int num=getindexByName(name,size); return num==-1?-1:goods[num].getAmount(); } public void deleteByName(String name,String size){ int num=getindexByName(name,size); for(int i=num;i<index-1;i++){ goods[i]=goods[i+1]; } goods[--index]=null; } public void update(Goods good){ for (int i=0;i<index ;i++ ){ if(goods[i].getName().equals(good.getName())){ if(goods[i].getSize().equals(good.getSize())){ goods[i].setPrice(good.getPrice()); goods[i].setMade(good.getMade()); goods[i].setDate(good.getDate()); goods[i].setAmount(good.getAmount()); } } } } public Goods Buy(String name,String size){ int num=getindexByName(name,size); return goods[num]; } public int getindexByName(String name,String size){ int num=-1; for (int i=0;i<index ;i++ ){ if(goods[i].getName().equals(name)){ if(goods[i].getSize().equals(size)){ num=i; break; } } } return num; } public int getindexByName(String name){ int num=-1; for(int i=0;i<index;i++){ if(goods[i].getName().equals(name)){ num=i; break; } } return num; } public void menu(){ System.out.println("&&&&&&&&&&&购物管理系统&&&&&&&&&&&"); System.out.println("1) 查询商品基本信息"); System.out.println("2) 输入商品信息"); System.out.println("3) 查询商品的剩余数量"); System.out.println("4) 删除商品信息"); System.out.println("5) 更新商品信息"); System.out.println("6) 购买商品"); System.out.println("help 获取帮助 "); System.out.println("exit 退出系统！"); System.out.println("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&"); } public static void main(String[] args){ Scanner sc=new Scanner(System.in); Shopping shop=new Shopping(); shop.menu(); while (true){ System.out.println("请输入对应指令"); String option=sc.nextLine(); switch(option){ case "1": System.out.println("以下是商品信息"); Goods[] goods=shop.find(); for (Goods good:goods){ System.out.println(good); } System.out.println("总共查询到"+shop.index+"个商品信息"); break; case "2": while(true){ System.out.println(" 请输入商品信息【name#price#made#date#amount#size】或输入break返回上一级目录"); String inStr=sc.nextLine(); if(inStr.equals("break")){ break; } String[] commodity=inStr.split("#"); String name=commodity[0]; double price=Double.parseDouble(commodity[1]); String made = commodity[2]; String date=commodity[3]; int amount=Integer.parseInt(commodity[4]); String size=commodity[5]; Goods good=new Goods(name,price,made,date,amount,size); shop.save(good); System.out.println("保存成功"); } break; case "3": while(true){ System.out.println("请输入查询剩余数量的商品【name#size】或输入break返回上一级目录"); String inStr=sc.nextLine(); if(inStr.equals("break")){ break; } String[] NS=inStr.split("#"); String name =NS[0]; String size =NS[1]; int num=shop.findAmount(name,size); System.out.println(num==-1?"对不起，未查询到您要的商品的剩余数量":"您要查询的商品的剩余数量为："+num); } break; case "4": while(true){ System.out.println("请输入删除商品的【name#size】或输入break返回上一级目录"); String inStr=sc.nextLine(); if(inStr.equals("break")){ break; } String[] In=inStr.split("#"); String name =In[0]; String size =In[1]; Goods good=shop.findByName(name,size); if (good==null){ System.out.println("对不起，您所查询的商品不存在"); continue; }else{ System.out.println("您要删除的商品信息为"+good+"\n确定请输入Yes\n"); String op = sc.nextLine(); if(op.equals("Yes")){ shop.deleteByName(name,size); System.out.println("删除成功！"); }else{ System.out.println("删除失败！！！"); } } } break; case "5": while(true){ System.out.println("请输入更新商品的【name#size】或输入break返回上一级目录"); String inStr=sc.nextLine(); if(inStr.equals("break")){ break; } String[] In=inStr.split("#"); String name =In[0]; String size =In[1]; Goods good=shop.findByName(name,size); if(good ==null){ System.out.println("您要更新的商品信息不存在"); break; } System.out.println("您要更新的商品信息为："+good); System.out.println("输入新信息【price#made#date#amount】"); String str=sc.nextLine(); String[] goodArr=str.split("#"); double price=Double.parseDouble(goodArr[0]); String made =goodArr[1]; String date =goodArr[2]; int amount=Integer.parseInt(goodArr[3]); Goods newgood=new Goods(name,price,made,date,amount,size); shop.update(newgood); System.out.println("修改成功"); } break; case "6": while(true){ System.out.println("输入购买商品的【name#size】或输入break返回上要一级目录"); String inStr=sc.nextLine(); if(inStr.equals("break")){ break; } String[] In=inStr.split("#"); String name =In[0]; String size =In[1]; Goods Buy=shop.findByName(name,size); if(Buy ==null){ System.out.println("您要购买的商品信息不存在"); break; } System.out.println("购买的商品为"+Buy+"\n确认请输入Yes"); String op = sc.nextLine(); if(op.equals("Yes")){ shop.Buy(name,size); System.out.println("购买成功！"); }else{ System.out.println("购买失败！！！"); } } break; case "help": shop.menu(); break; case "exit": System.out.println("&&欢迎下次使用&&"); System.exit(0); break; default: System.out.println("输入信息错误！！！请重新输入"); } } } }