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
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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
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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
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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
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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 ; } } } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://blog.csdn.net/scropio0zry/article/details/78440253