这篇“java如何实现简单快递系统”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“java如何实现简单快递系统”文章吧。
具体内容如下
创建四个类Express,Locker, User, Administrator分别模拟快递，快递柜，用户和管理员。
import java.util.Random;import java.util.Scanner;public class Test { static Scanner in = new Scanner(System.in); public static void main(String[] args) { // 生成快递柜， 但在后续修改快递位置时没考虑越界问题 Locker locker = new Locker(10, 10); // 创建管理员 Administrator administrator = new Administrator(locker); //程序主逻辑 outer: while (true){ switch (login("请选择身份:(-1退出 0管理员身份 1用户身份)", 1)){ case -1: break outer; case 0: switch (login("请选择操作:(-1退出 0快递录入 1删除快递 2修改快递 3查看快递)", 3)){ case -1: break; case 0: in.nextLine(); System.out.println("请输入公司名称:"); System.out.println("取件码:"+administrator.store(in.nextLine())); break; case 1: administrator.remove(); break; case 2: administrator.change(); break; case 3: administrator.show(); break; } break; case 1: switch (login("请选择操作:(-1退出 0取快递)", 0)){ case -1: break; case 0: in.nextLine(); fetch(locker); break; } break; } } } // 生成有效选择，处理无效选择产生的异常 public static int login(String string, int n){ try{ System.out.println(string); int select = in.nextInt(); if (select > n || select < -1){ System.out.println("请输入有效选择！"); in.nextLine(); return login(string, n); } return select; }catch (Exception e){ System.out.println("请输入有效选择！"); in.nextLine(); return login(string, n); } } // 用户取快递，确保输入有效验证码 public static void fetch(Locker locker){ System.out.println("请输入六位验证码:"); String code = in.nextLine(); User user = new User(code, locker); if (user.fetch()){ System.out.println("取件成功"); }else { System.out.println("验证码有误，请重新输入！"); fetch(locker); } }}class Express { private final String code; private String company; private final String number; private int[] position; public Express(String code, String company, String number, int[] position) { this.code = code; this.company = company; this.number = number; this.position = position; } public String getCode() { return code; } public String getCompany() { return company; } public String getNumber() { return number; } public int[] getPosition() { return position; } public void setCompany(String company) { this.company = company; } public void setPosition(int row, int column) { this.position[0] = row; this.position[1] = column; } @Override public String toString() { StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append("快递信息简介{"); stringBuilder.append("快递公司:"); stringBuilder.append(company); stringBuilder.append(", 快递单号:"); stringBuilder.append(number); stringBuilder.append(", 存放位置:"); stringBuilder.append("第"); stringBuilder.append(position[0]); stringBuilder.append("排,第"); stringBuilder.append(position[1]); stringBuilder.append("列"); return stringBuilder.toString(); }}class Locker { Express[][] code; Random random; int[] position; private final int LENGTH_OF_CODE = 6; private final int LENGTH_OF_NUMBER = 14; public Locker(int row, int column){ code = new Express[row][column]; random = new Random(); position = new int[2]; } // 生成验证码 public String generateCode(){ StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < LENGTH_OF_CODE; i++){ stringBuilder.append(random.nextInt(10)); } String string = stringBuilder.toString(); checkCode(string); return position[0] == -1 ? string : generateCode(); } // 生成快递单号 public String generateNumber(){ StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < LENGTH_OF_NUMBER; i++){ stringBuilder.append(random.nextInt(10)); } String string = stringBuilder.toString(); checkNumber(string); return position[0] == -1 ? string : generateNumber(); } //生成存放位置 public int[] generatePosition(){ int row = random.nextInt(code.length); int column = random.nextInt(code[0].length); if (code[row][column] != null){ return generatePosition(); }else{ position[0] = row; position[1] = column; return position; } } // 检查有无重复验证码，有则将position改成相应位置，无则position第一个元素为-1 public void checkCode(String string){ position[0] = -1; outer: for (int i = 0; i < code.length; i++){ for (int j = 0; j < code[0].length; j++) { if (code[i][j] != null && code[i][j].getCode().equals(string)) { position[0] = i; position[1] = j; break outer; } } } } // 检查有无重复快递单号 public void checkNumber(String string){ position[0] = -1; outer: for (int i = 0; i < code.length; i++){ for (int j = 0; j < code[0].length; j++) { if (code[i][j] != null && code[i][j].getNumber().equals(string)) { position[0] = i; position[1] = j; break outer; } } } } // 将快递存入快递柜 public String store(Express express){ code[position[0]][position[1]] = express; return express.getCode(); } public void store(Express express, int row, int column){ code[row][column] = express; } // 取出快递 public Express fetch(){ Express express = code[position[0]][position[1]]; code[position[0]][position[1]] = null; return express; } public int[] getPosition() { return position; } // 打印所有快递信息 public void check(){ int count = 0; for (Express[] expresses: code){ for (Express express : expresses){ if (express != null){ System.out.println(express.toString()); count++; } } } if (count == 0){ System.out.println("无快递"); } }}class User { private final String code; private Locker locker; public User(String code, Locker locker) { this.code = code; this.locker = locker; } // 取快递 public boolean fetch(){ locker.checkCode(code); if (locker.getPosition()[0] == -1){ return false; }else { System.out.println(locker.fetch().toString()); return true; } }}class Administrator { Locker locker; Scanner in = new Scanner(System.in); public Administrator(Locker locker) { this.locker = locker; } // 录入快递 public String store(String company){ String number = locker.generateNumber(); String code = locker.generateCode(); int[] position = locker.generatePosition(); return locker.store(new Express(code, company, number, position)); } // 删除快递 public void remove(){ System.out.println("请输入14位快递单号:"); String number = in.nextLine(); locker.checkNumber(number); if (locker.getPosition()[0] != -1){ System.out.println("单号为"+locker.fetch().getNumber()+"的快递已经删除"); }else{ System.out.println("快递单号不存在，请重试"); remove(); } } // 修改快递 public void change(){ System.out.println("请输入14位快递单号:"); String number = in.nextLine(); locker.checkNumber(number); if (locker.getPosition()[0] != -1){ Express express = locker.fetch(); System.out.println("请输入新的快递公司:"); express.setCompany(in.nextLine()); System.out.println("请输入新的位置:(先行后列,空格隔开)"); int row = in.nextInt(); int column = in.nextInt(); express.setPosition(row, column); locker.store(express, row, column); System.out.println("修改成功！"); }else{ System.out.println("快递单号不存在，请重试"); change(); } } // 显示所有快递信息 public void show(){ locker.check(); }}以上就是关于“java如何实现简单快递系统”这篇文章的内容，相信大家都有了一定的了解，希望小编分享的内容对大家有帮助，若想了解更多相关的知识内容，请关注编程网行业资讯频道。
