本文实例为大家分享了java实现简单快递系统的具体代码，供大家参考，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。
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import java.util.Random; import java.util.Scanner;
/** * @author hxf * * @date 2020/12/12 */ 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 {
/** * @param code: 6位验证码，数字字符串 * @param company: 公司名称 * @param number: 14位快递单号， 数字字符串 * @param position: 快递存放位置 * @author hxf * @describe: 快递 * @date 2020/12/11 1:17 */
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 测试数据pany = 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 测试数据pany = 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 {
/** * @param code: 存储Express * @param random: 随机数生成器 * @param position: 存放临时快递位置 * @param LENGTH_OF_CODE: 验证码长度 * @author hxf * @describe: 快递柜 * @date 2020/12/11 1:25 */
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 {
/** *@Param: code: 验证码 *@Param: locker: 快递柜 *@Author: hxf *@date: 2020/12/12 */
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 {
/** *@Param: locker: 快递柜 *@Author: hxf *@date: 2020/12/12 */
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。
原文链接：https://blog.csdn.net/helloworld370629/article/details/111062436