java实现水果超市管理系统

本文为大家分享了java实现水果超市管理系统的具体代码，供大家参考，具体内容如下

首先建立水果类的界面

public class Fruit { 
 //定义ID 
 private String id; 
 //定义名称 
 private String name; 
 //定义价格 
 private int price; 
 //定义单位 
 private String unit; 
 
 //定义数量 
 private int number; 
 public Fruit(String id, String name, int price, String unit) { 
 super(); 
 this.id = id; 
 this.name = name; 
 this.price = price; 
 this.unit = unit; 
 } 
 public Fruit() { 
 super(); 
 // TODO Auto-generated constructor stub 
 } 
 public String getId() { 
 return id; 
 } 
 public void setId(String id) { 
 this.id = id; 
 } 
 public String getName() { 
 return name; 
 } 
 public void setName(String name) { 
 this.name = name; 
 } 
 public int getPrice() { 
 return price; 
 } 
 public void setPrice(int price) { 
 this.price = price; 
 } 
 public String getUnit() { 
 return unit; 
 } 
 public void setUnit(String unit) { 
 this.unit = unit; 
 } 
 public int getNumber() { 
 return number; 
 } 
 public void setNumber(int number) { 
 this.number = number; 
 } 
 
 //获取价格 
 public int getMoney(){ 
 return price * number; 
 } 
 
} 

水果超市的界面

import java.io.IOException; 
import java.util.Scanner; 
 
public class FruitTest { 
 public static void main(String[] args) throws IOException { 
 Scanner sc = new Scanner(System.in); 
 Shopper shopper = new Shopper(); 
 Manager manager = new Manager(); 
  
 while(true){ 
  System.out.println( "    欢迎光临水果系统"); 
  System.out.println("请输入你的角色:(1.顾客 2.管理员 3.退出)"); 
  int choice = sc.nextInt(); 
  switch(choice){ 
  case 1: 
  //顾客 
  shopper.shop(); 
  break; 
  case 2: 
  //管理员 
  manager.manager(); 
  break; 
  case 3: 
  System.exit(0); 
  default: 
  System.out.println("你的输入有误!"); 
  } 
 } 
  
 } 
} 

顾客类

import java.io.BufferedReader; 
import java.io.FileReader; 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.Scanner; 
 
public class Shopper { 
 public void shop() throws IOException { 
 Scanner sc = new Scanner(System.in); 
 ArrayList<Fruit> list = new ArrayList<Fruit>(); 
 check(list); 
 while (true) { 
  System.out 
   .println("     欢迎光临水果系统"); 
  System.out 
   .println("请输入你的操作:(1.查看水果 2.购买水果 3.结账  4.退出)"); 
  int choice = sc.nextInt(); 
  switch (choice) { 
  case 1: 
  // 查看水果 
  print(list); 
  break; 
  case 2: 
  // 购买水果 
  buy(list); 
  break; 
  case 3: 
  // 结账 
  checkOut(list); 
  break; 
  case 4: 
  // 退出 
  return; 
  default: 
  System.out.println("你输入的操作有误!"); 
  } 
 
 } 
 
 } 
 
 //结账 
 private void checkOut(ArrayList<Fruit> list) { 
 int sum = 0; 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  sum += f.getMoney(); 
 } 
  
 if(sum>200){ 
  int newSum = (int) (sum * 0.9); 
  System.out.println("金额：" + sum+ "元, 优惠价格："+ newSum+"元"); 
 }else{ 
  System.out.println("金额：" + sum+"元"); 
 } 
  
 //结完账后，将数量清0 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  f.setNumber(0); 
 } 
 } 
 
 // 购买水果 
 public void buy(ArrayList<Fruit> list) throws IOException { 
 Scanner sc1 = new Scanner(System.in); 
 Scanner sc2 = new Scanner(System.in); 
 print(list); 
 while (true) { 
  System.out.println("购买超过200元，享受九折优惠！"); 
  System.out.println("请输入想要购买的水果的ID：(如果不想购买，请输入-1退出)"); 
  String id = sc1.nextLine(); 
  if ("-1".equals(id)) { 
  System.out.println("购买已结束，请去结账 "); 
  return; 
  } else { 
  boolean flag = false; 
  for (int i = 0; i < list.size(); i++) { 
   Fruit f = list.get(i); 
   if(f.getId().equals(id)) { 
   System.out.println("请输入购买" + f.getName() + "数量： "); 
   int num = sc2.nextInt(); 
   f.setNumber(num); 
   flag = true; 
   } 
  } 
  if(!flag){ 
   System.out.println("你输入的水果ID不正确,请重新输入"); 
  } 
  } 
 
 } 
 
 } 
 
 // 查看水果 
 public void check(ArrayList<Fruit> list) throws IOException { 
 BufferedReader br = new BufferedReader(new FileReader("fruit.txt")); 
 String line; 
 while ((line = br.readLine()) != null) { 
  String[] str = line.split(" "); 
  Fruit f = new Fruit(str[0], str[1], Integer.parseInt(str[2]), 
   str[3]); 
  list.add(f); 
 } 
 br.close(); 
 } 
 
 public void print(ArrayList<Fruit> list) { 
 System.out.println("ID\t水果\t价格\t单位"); 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  System.out.println(f.getId() + "\t" + f.getName() + "\t" 
   + f.getPrice() + "\t" + f.getUnit()); 
 } 
 } 
} 

管理员类

import java.io.BufferedReader; 
import java.io.BufferedWriter; 
import java.io.FileNotFoundException; 
import java.io.FileReader; 
import java.io.FileWriter; 
import java.io.IOException; 
import java.util.ArrayList; 
import java.util.Scanner; 
 
public class Manager { 
 
 public void manager() throws IOException { 
 if (load()) {  
  Scanner sc = new Scanner(System.in); 
  while (true) { 
  ArrayList<Fruit> list = new ArrayList<Fruit>(); 
  check(list); 
  System.out 
   .println("请输入您的操作： (1.查看水果种类  2.增加水果种类 3.修改水果种类 4.删除水果种类  5退出)"); 
  int choice = sc.nextInt(); 
  switch (choice) { 
  case 1: 
   // 查看水果种类 
   print(list); 
   break; 
  case 2: 
   // 增加水果种类 
   addFruit(list); 
   break; 
  case 3: 
   // 修改水果种类 
   reverse(list); 
   break; 
  case 4: 
   // 删除水果种类 
   remove(list); 
   break; 
  case 5: 
   // 退出 
   return; 
  default: 
   System.out.println("你输入的操作有误!"); 
   break; 
  } 
  } 
 
 } else { 
  return; 
 } 
 } 
 
 public void remove(ArrayList<Fruit> list) throws IOException { 
 Scanner sc = new Scanner(System.in); 
 print(list); 
 System.out.println("请输入要删除的水果ID: "); 
 String id = sc.nextLine(); 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  if(f.getId().equals(id)){ 
  list.remove(i); 
  write(list); 
  System.out.println("删除成功"); 
  return; 
  } 
 } 
 System.out.println("找不到要删除的水果ID!"); 
 } 
 
 //修改水果 
 public void reverse(ArrayList<Fruit> list) throws IOException { 
 Scanner sc1 = new Scanner(System.in); 
 Scanner sc2 = new Scanner(System.in); 
 print(list); 
 System.out.println("请输入要修改的水果ID: "); 
 String id = sc1.nextLine(); 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  if(f.getId().equals(id)){ 
  System.out.println("请输入水果的名称: "); 
  String name = sc1.nextLine(); 
  System.out.println("请输入水果的价格: "); 
  int price = sc2.nextInt(); 
  System.out.println("请输入水果的单位: "); 
  String unit = sc1.nextLine(); 
   
  f.setName(name); 
  f.setPrice(price); 
  f.setUnit(unit); 
   
  write(list); 
  System.out.println("修改成功"); 
  return; 
  } 
 } 
 System.out.println("找不到要修改的水果ID!"); 
  
  
 } 
 
 //增加水果 
 public void addFruit(ArrayList<Fruit> list) throws IOException { 
 Scanner sc1 = new Scanner(System.in); 
 Scanner sc2 = new Scanner(System.in); 
 print(list); 
 System.out.println("请输入要增加水果的ID: "); 
 String id = sc1.nextLine(); 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  if(f.getId().equals(id)){ 
  System.out.println("水果ID名重复!"); 
  return; 
  } 
 } 
 System.out.println("请输入水果的名字: "); 
 String name = sc1.nextLine(); 
 System.out.println("请输入水果的价格: "); 
 int price = sc2.nextInt(); 
 System.out.println("请输入水果的单位: "); 
 String unit = sc1.nextLine(); 
  
 Fruit f = new Fruit(id, name, price, unit); 
 list.add(f); 
  
 write(list); 
 System.out.println("增加成功"); 
  
 } 
 //写入新加的种类 
 private void write(ArrayList<Fruit> list) throws IOException { 
 BufferedWriter bw = new BufferedWriter(new FileWriter("fruit.txt")); 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  bw.write(f.getId()+" " + f.getName() + " " + f.getPrice() + " " + f.getUnit()); 
  bw.newLine(); 
 } 
 bw.close(); 
 } 
 
 
 public void print(ArrayList<Fruit> list) { 
 System.out.println("ID\t水果\t价格\t单位"); 
 for (int i = 0; i < list.size(); i++) { 
  Fruit f = list.get(i); 
  System.out.println(f.getId() + "\t" + f.getName() + "\t" 
   + f.getPrice() + "\t" + f.getUnit()); 
 } 
 } 
 
 // 查看水果 
 public void check(ArrayList<Fruit> list) throws IOException { 
 BufferedReader br = new BufferedReader(new FileReader("fruit.txt")); 
 String line; 
 while ((line = br.readLine()) != null) { 
  String[] str = line.split(" "); 
  Fruit f = new Fruit(str[0], str[1], Integer.parseInt(str[2]), 
   str[3]); 
  list.add(f); 
 } 
 br.close(); 
 } 
 
 // 登陆系统 
 public boolean load() throws FileNotFoundException, IOException { 
 Scanner sc = new Scanner(System.in); 
 
 System.out.println("请输入用户名： "); 
 String username = sc.nextLine(); 
 System.out.println("请输入密码： "); 
 String password = sc.nextLine(); 
 BufferedReader br = new BufferedReader(new FileReader("admin.txt")); 
 String line = br.readLine(); 
 String[] str = line.split(","); 
 if (str[0].equals(username) && str[1].equals(password)) { 
  System.out.println("欢迎您进入水果管理系统： " + username); 
  return true; 
 } else { 
  System.out.println("你的用户名或密码输入不正确，无法进入管理系统"); 
  return false; 
 } 
 } 
} 

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