控制台快递系统-面向过程

/** 
 * Project Name:day01_test1.
 * File Name:ExpressEStation.java.
 * Package Name:
 * Date:
 * Copyright (c) 
 * 
*/  
  
package day01;
​
import java.util.*;
import java.util.Map.Entry;
​
/** 
 * ClassName:ExpressEStation.
 * Function: TODO ADD FUNCTION.
 * Reason:   TODO ADD REASON.
 * Date:     
 * @author   
 * @version   
 * @since    JDK 1.8 
 * @see       
 */
public class ExpressEStation {
    /**
     * 存放所有快递的仓库。
     */
    private static HashMap<String, String> allExpresses = new HashMap<>();
    /**
     * 用户取快递时，取件码与快递单号的对应关系。
     */
    private static HashMap<String, String> relationships = new HashMap<>();
    /**
     * 获取用户键盘输入。
     */
    private static Scanner input = new Scanner(System.in);
    /** 
     * storageExpress:(存放快递).
     * @author 
     * @param expressNumber 快递单号
     * @param companyName 公司名称
     * @since JDK 1.8 
     */ 
    public static void storageExpress(String expressNumber, String companyName) {
        if (allExpresses.containsKey(expressNumber)) {
            System.out.println("在仓库中已有快递单号为" + expressNumber +"的快递。");
            System.out.println("该快递的信息是：");
            System.out.println("快递单号\t\t公司名称\t\t取件码");
            System.out.println(expressNumber + "\t\t" + allExpresses.get(expressNumber));
        } else {
            //快递的取件码，采取随机生成的策略，值在100-999之间。
            int pickUpCode = (int)(Math.random()*899 + 100);
            while (relationships.containsKey(pickUpCode + "")) {
                pickUpCode = (int)(Math.random()*899 + 100);
            }
            allExpresses.put(expressNumber, companyName + "\t\t" + pickUpCode);
            relationships.put(pickUpCode+"", expressNumber);
            System.out.println("快递已存入，取件码是：" + pickUpCode);
        }
    }
    /** 
     * deleteExpress:(删除快递).
     * @author 
     * @param expressNumber 快递单号
     * @since JDK 1.8 
     */ 
    public static void deleteExpress(String expressNumber) {
        if (allExpresses.containsKey(expressNumber)) {
            System.out.println("您确定要删除仓库中快递信息为：");
            System.out.println("快递单号\t\t公司名称\t\t取件码");
            System.out.println(expressNumber + "\t\t" + allExpresses.get(expressNumber));
            System.out.println("的快递吗？");
            System.out.println("请输入您的选择：1-是     2-否");
            if (input.hasNextInt()) {
                int choice = input.nextInt();
                while(true) {
                    if (choice == 1) {
                        String pickUpCode = allExpresses.get(expressNumber).split("\t\t")[1];
                        allExpresses.remove(expressNumber);
                        relationships.remove(pickUpCode);
                        System.out.println("删除快递成功！");
                        break;
                    } else if (choice == 2) {
                        System.out.println("取消删除快递，快递未删除！");
                        break;
                    } else {
                        System.out.println("输入错误，请输入1或2进行操作。");
    }
    }
    } else {
System.out.println("请输入一个整数！");
    }
    } else {
System.out.println("仓库中没有快递单号为：" + expressNumber + "的快递！");
    }
    }
/** 
* modifyExpress:(修改快递).
* @author 
* @param expressNumber 快递单号
* @since JDK 1.8 
*/ 
public static void modifyExpress(String expressNumber) {
if (allExpresses.containsKey(expressNumber)) {
System.out.println("您确定要修改仓库中快递信息为：");
System.out.println("快递单号\t\t公司名称\t\t取件码");
System.out.println(expressNumber + "\t\t" + allExpresses.get(expressNumber));
System.out.println("的快递吗？");
System.out.println("请输入您的选择：1-是    2-否");
if (input.hasNextInt()) {
int choice = input.nextInt();
while(true) {
if (choice == 1) {
System.out.println("请输入新的快递单号：");
String newExpressNumber = input.next();
System.out.println("请输入新的公司名称：");
String newCompanyName = input.next();
int newPickUpCode = (int)(Math.random()*899 + 100);
while (relationships.containsKey(newPickUpCode + "")) {
newPickUpCode = (int)(Math.random()*899 + 100);
    }
String pickUpCode = allExpresses.get(expressNumber).split("\t\t")[1];
allExpresses.remove(expressNumber);
allExpresses.put(newExpressNumber, newCompanyName + "\t\t" + newPickUpCode);
relationships.remove(pickUpCode);
relationships.put(newPickUpCode + "", newExpressNumber);
System.out.println("修改快递成功！");
System.out.println("新的快递信息为：");
System.out.println("快递单号\t\t公司名称\t\t取件码");
System.out.println(newExpressNumber + "\t\t" + allExpresses.get(newExpressNumber));
break;
    } else if (choice == 2) {
System.out.println("取消修改快递，快递未修改！");
break;
    } else {
System.out.println("输入错误，请输入1或2进行操作。");
System.out.println("请输入您的选择：1-是    2-否");
    }
    }
    } else {
System.out.println("请输入一个整数！");
    }
    } else {
System.out.println("仓库中没有快递单号为：" + expressNumber + "的快递！");
    }
    }
/** 
* seeAllExpress:(查看所有快递).
* @author 
* @since JDK 1.8 
*/ 
public static void seeAllExpress() {
if (!allExpresses.isEmpty()) {
System.out.println("仓库中的所有快递信息为：");
System.out.println("快递单号\t\t公司名称\t\t取件码");
for (Entry<String, String> express : allExpresses.entrySet()) {
String expressNumber = express.getKey();
String otherInformation = express.getValue();
System.out.println(expressNumber + "\t\t" + otherInformation);
    }
    } else {
System.out.println("仓库为空，无快递信息!");
    }
    }
/** 
* deliveryExpress:(取出快递).
* @author 
* @param pickUpCode 取件码
* @since JDK 1.8 
*/ 
public static void deliveryExpress(String pickUpCode) {
if (relationships.containsKey(pickUpCode)) {
String expressNumber = relationships.get(pickUpCode);
System.out.println("取出快递信息为：");
System.out.println("快递单号\t\t公司名称\t\t取件码");
System.out.println(expressNumber + "\t\t" + allExpresses.get(expressNumber));
System.out.println("的快递成功！");
allExpresses.remove(expressNumber);
relationships.remove(pickUpCode);
    } else {
System.out.println("仓库中无此快递！");
    }
    }
/** 
* main:(程序执行的入口). 
* @author 
* @param args 命令行参数
* @since JDK 1.8 
*/
public static void main(String[] args) {
        first:while(true) {
System.out.println("===========欢迎来到控制台快递e站系统===========");
String expressNumber;
String companyName;
String pickUpCode;
int choice;
second:while (true) {
System.out.println("请输入您的身份：1-快递员    2-用户");
choice = input.nextInt();
if (choice == 1) {
while (true) {
System.out.println("请选择操作：");
System.out.println("1-存放快递  2-取出快递");
System.out.println("3-修改快递  4-查看快递");
System.out.println("5-删除快递  6-选择身份");
System.out.println("7-退出系统");
choice = input.nextInt();
switch (choice) {
case 1:
System.out.println("请输入快递单号：");
expressNumber = input.next();
System.out.println("请输入公司名称：");
companyName = input.next();
storageExpress(expressNumber,companyName);
break;

case 2:
System.out.println("请输入取件码：");
pickUpCode = input.next();
deliveryExpress(pickUpCode);
break;

case 3:
System.out.println("请输入快递单号：");
expressNumber = input.next();
modifyExpress(expressNumber);
break;

case 4:
seeAllExpress();
break;

case 5:
System.out.println("请输入快递单号：");
expressNumber = input.next();
deleteExpress(expressNumber);
break;

case 6:
break second;

case 7:
break first;

default:
System.out.println("请输入1-5之间的数字进行操作的选择！");
break;
    }
    }
    } else if (choice == 2) {
while (true) {
System.out.println("请选择操作：");
System.out.println("1-取出快递  2-选择身份");
System.out.println("3-退出系统");
choice = input.nextInt();
switch (choice) {
case 1:
System.out.println("请输入取件码：");
pickUpCode = input.next();
deliveryExpress(pickUpCode);
break;

case 2:
break second;

case 3:
break first;
​
default:
System.out.println("请输入1-3之间的数字进行操作的选择！");
break;
    }
    }
    }
    }
        }
        System.out.println("=====退出成功！期待您再次使用控制台快递e站系统=====");
    }
}