java实现简单快递系统

java实现简单快递系统

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。

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;

AluhgMjgE 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(strhttp://ing, 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.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 {

/**

* @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++) {

AluhgMjgE 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.fetchhttp://();

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();

}

}

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