package com.entity;
import java.text.SimpleDateFormat;
import java.util.Date;
public class DVD {
private String name;
private boolean borrowed;
private Date borrowedTime;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getBorrowedTime() {
return borrowedTime;
}
public void setBorrowedTime(Date borrowedTime) {
this.borrowedTime = borrowedTime;
}
public DVD(String name, boolean borrowed, Date borrowedTime) {
super();
this.name = name;
this.setBorrowed(borrowed);
this.borrowedTime = borrowedTime;
}
public DVD() {
super();
}
public String toString(){
String status= isBorrowed()?"已借出":"可借";
String date;
if(getBorrowedTime()==null){
date="";
}else{
date=new SimpleDateFormat("yyyy-MM-dd").format(getBorrowedTime());
}
return "《"+getName()+"》\t"+status+"\t"+date;
}
public void setBorrowed(boolean borrowed) {
this.borrowed = borrowed;
}
public boolean isBorrowed() {
return borrowed;
}
}
package com.entity;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Scanner;
public class DVDManager {
private ArrayList<DVD> dvdList;
private final int price=2;//一张DVD2块钱1天
SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
Scanner input=new Scanner(System.in);
public void setDvdList(ArrayList<DVD> dvdList) {
this.dvdList = dvdList;
}
public ArrayList<DVD> getDvdList() {
return dvdList;
}
public DVDManager(){
}
public DVDManager(ArrayList<DVD> dvdList){
this.dvdList=dvdList;
}
public void initial(){
dvdList=new ArrayList<DVD>();
try {
DVD d=new DVD("罗马假日",true,sdf.parse("2013-07-01"));
DVD d2=new DVD("风声鹤唳",false,null);
DVD d3=new DVD("浪漫满屋",false,null);
dvdList.add(d);
dvdList.add(d2);
dvdList.add(d3);
} catch (ParseException e) {
e.printStackTrace();
}
}
public void mainMenu(){
System.out.println("欢迎使用迷你DVD管理器");
System.out.println("-------------------------------------------------------");
System.out.println("" +
"1. 新增DVD\n" +
"2. 查看DVD\n" +
"3. 删除DVD\n" +
"4. 借出DVD\n" +
"5. 归还DVD\n" +
"6. 退出DVD");
System.out.println("-------------------------------------------------------");
System.out.print("请选择：");
input=new Scanner(System.in);
String regex="^[1-6]{1}$";
while(!input.hasNext(regex)){
input=new Scanner(System.in);
System.out.print("输入有误，请重新选择：");
}
int check_1=input.nextInt();
switch(check_1){
case 1:
addDVD();
break;
case 2:
queryAll();
break;
case 3:
deleteDVD();
break;
case 4:
borrowDVD();
break;
case 5:
lend();
break;
case 6:
System.out.println();
System.out.println("谢谢使用！");
System.exit(0);
break;
}
System.out.println("********************************");
back();
}
public void back(){
System.out.print("输入0返回：");
input=new Scanner(System.in);
String regex="^0$";
while(!input.hasNext(regex)){
input=new Scanner(System.in);
System.out.print("输入有误，输入0返回：");
}
mainMenu();
}
public void queryAll(){
System.out.println("----> 查看DVD\n");
System.out.println("序号\t 名称 \t\t状态\t 借出日期");
for(int i=0;i<dvdList.size();i++){
System.out.println((i+1)+"\t"+dvdList.get(i));
}
}
public DVD findDVDByName(String name){
//DVD dvd=null; 与DVD dvd=new DVD()；是有不同的
DVD dvd=null;
for(int i=0;i<dvdList.size();i++){
if(dvdList.get(i).getName().equals(name)){
dvd=dvdList.get(i);
break;
}
}
return dvd;
}
public void addDVD(){//新增DVD
System.out.println("----> 新增DVD\n");
System.out.print("请输入DVD名称：");
String name=input.next();
DVD d=findDVDByName(name);
if(d!=null){
System.out.println("该DVD已经存在，不能再次添加！");
return;
}
d=new DVD(name,false,null);
dvdList.add(d);
System.out.println("新增《"+d.getName()+"》成功！");
}
public void borrowDVD(){
System.out.println("----> 借出DVD\n");
System.out.print("请输入DVD名称：");
String name=input.next();
DVD d=findDVDByName(name);
if(d==null){
System.out.println("该DVD不存在，无法借出！");
return;
}else if(d.isBorrowed()){
System.out.println("不好意思，该DVD已被借出！");
}
System.out.print("请输入借书日期(年-月-日)：");
String regex="\\d{4}-(([1][012])|([0][0-9]))-(([012][0-9])|([3][0]))";
while(!input.hasNext(regex)){
input=new Scanner(System.in);
System.out.print("借书日期格式有误请重新输入：");
}
Date date = null;
try {
date=sdf.parse(input.next());
} catch (ParseException e) {
e.printStackTrace();
}
int index=dvdList.indexOf(d);
d.setBorrowed(true);
d.setBorrowedTime(date);
dvdList.set(index, d);
System.out.println("借出《"+name+"》成功！");
}
public void deleteDVD(){
System.out.println("----> 删除DVD\n");
System.out.print("请输入DVD名称：");
String name=input.next();
DVD d=findDVDByName(name);
if(d==null){
System.out.println("该DVD不存在，无法删除！");
return;
}else if(d.isBorrowed()){
System.out.println("该DVD已被借出,无法删除");
return;
}
dvdList.remove(d);//移除第一个，后面自动左移
System.out.println("删除《"+name+"》成功！");
}
public void lend(){
System.out.println("----> 归还DVD\n");
System.out.print("请输入DVD名称：");
String name=input.next();
DVD d=findDVDByName(name);
if(d==null){
System.out.println("归还失败，该DVD不是我们店里的！");
return;
}else if(!d.isBorrowed()){
System.out.println("归还失败，该DVD已经归还，您的DVD不是我们店里的！");
return;
}
Date borrowDate = d.getBorrowedTime();
Date lendDate = null;
long spend;
System.out.print("请输入还书日期(年-月-日)：");
String regex="\\d{4}-(([1][012])|([0][0-9]))-(([012][0-9])|([3][0]))";
while(true){//感觉还是玩死循环跳出爽
while(!input.hasNext(regex)){
input=new Scanner(System.in);
System.out.print("还书日期格式有误请重新输入：");
}
try {
lendDate=sdf.parse(input.next());
} catch (ParseException e) {
e.printStackTrace();
}
if(lendDate.before(borrowDate)){//Date的比较前者是否在后者之前的方法
System.out.println("还书日期不可能比借出日期还早，请重新输入");
}else{
break;
}
}
spend=lendDate.getTime()-borrowDate.getTime();
int money=(int) Math.ceil(spend/(24*60*60*1000))*price;
int index=dvdList.indexOf(d);
d.setBorrowed(false);
d.setBorrowedTime(null);
dvdList.set(index, d);
System.out.println("归还成功！");
System.out.println("应付租金（元）："+money);
}
}
package com.test;
import com.entity.DVDManager;
public class Test {
public static void main(String[] args) {
DVDManager dm=new DVDManager();
dm.initial();
dm.mainMenu();
}
}
