import java.util.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Scanner;
class Book{
//书名集合
List<String> nameList =new ArrayList<String>();
//书借出状态 1:表示未借出 0:表示已借出
List<Integer> stateList = new ArrayList<Integer>();
//借出时间
List<String> timeList = new ArrayList<String>();
//记录借书次数
List<Integer> countBook = new ArrayList<Integer>();
//输入对象
Scanner scan = new Scanner(System.in);
//记录所选的功能
int number;
//判断是否退出
int systemNum;
public void initBook(){
nameList.add("世界是数字的");
stateList.add(1);
timeList.add("");
countBook.add(100);
nameList.add("罗氏家族语录");
stateList.add(0);
timeList.add("2016-9-8");
countBook.add(150);
nameList.add("钢铁是怎样炼成的");
stateList.add(1);
timeList.add("");
countBook.add(10);
}
//欢迎界面
public void helloBook(){
System.out.println("*************欢迎进入图书管理系统***************");
System.out.println("********** 1. 新增DVD ***************");
System.out.println("********** 2. 查看DVD ***************");
System.out.println("********** 3. 删除DVD ***************");
System.out.println("********** 4. 借出DVD ***************");
System.out.println("********** 5. 归还DVD ***************");
System.out.println("********** 6. 排行榜 ***************");
System.out.println("********** 6. 排行榜 ***************");
System.out.println("********** 7. 退 出 ***************");
System.out.println("************************************************");
System.out.println("请输入你的选择：");
number = scan.nextInt();
}
//功能区
public void funtion(){
helloBook();
switch (number) {
//添加
case 1:
addBook(scan);
logDown(scan);
if (systemNum == 0){
funtion();
}
break;
//查看书籍
case 2:
check();
logDown(scan);
if (systemNum == 0) {
funtion();
}
break;
//删除书籍
case 3:
removeBook(scan);
logDown(scan);
if (systemNum == 0) {
funtion();
}
break;
case 4:
loan(scan);
logDown(scan);
if (systemNum == 0) {
funtion();
}
break;
case 5:
returnBook(scan);
logDown(scan);
if (systemNum == 0) {
funtion();
}
break;
case 6:
rankList();
logDown(scan);
if (systemNum == 0) {
funtion();
}
break;
case 7:
System.out.println("谢谢使用图书管理系统......");
break;
default :
System.out.println("输入有误!!!");
funtion();
break;
}
}
//打印方法
public void print(List<String> name,List<Integer> state,List<String> time){
Iterator runList = name.iterator();
System.out.println("序号\t"+"状态\t"+"书名\t\t\t"+"借出时间");
int count = 0;
String stateStr = null;
while(runList.hasNext()){
if (stateList.get(count).intValue() == 0) {
stateStr = "已借出";
}else {
stateStr = "可借";
}
runList.next();
System.out.println((count+1) + "\t" + stateStr + "\t<<" + name.get(count) + ">>\t\t" + time.get(count));
count++;
}
}
//退出系统
public void logDown(Scanner scan){
while (true) {
System.out.println("输入0退出！！！");
systemNum = scan.nextInt();
if (systemNum == 0) {
break;
}else {
System.out.println("输入有误!!!");
}
}
}
//添加书籍
public void addBook(Scanner scan){
System.out.println("请输入书名***");
nameList.add(scan.next());
stateList.add(1);
timeList.add("");
countBook.add(0);
}
//查看书籍
public void check(){
print(nameList, stateList, timeList);
}
//删除书籍
public void removeBook(Scanner scan){
System.out.println("请输入要删除的书名...");
String str = scan.next();
int count = nameList.indexOf(str);
if (count >= 0) {
if (stateList.get(count).intValue() != 0) {
nameList.remove(count);
stateList.remove(count);
timeList.remove(count);
System.out.println("删除/成功...");
}else {
System.out.println("此书以被借出，不能删除...");
}
}else {
System.out.println("图书馆没有此书，请核对...");
}
}
//借出
public void loan(Scanner scan){
System.out.println("输入要借的书名...");
String str = scan.next();
int count = nameList.indexOf(str);
System.out.println("*********\t"+count);
if (count >= 0) {
if(stateList.get(count).intValue() != 0){
System.out.println("输入借书时间(年-月-日)...");
String timeStr = scan.next();
timeList.set(count, timeStr);
stateList.set(count, 0);
countBook.set(count, countBook.get(count)+1);
System.out.println("操作成功...");
}else {
System.out.println("此书已被借出，抱歉...");
}
}else {
System.out.println("图书馆没有你要借的书，请核对...");
}
}
//归还
public void returnBook(Scanner scan){
System.out.println("你好，谢谢你来还书...");
System.out.println("请输入你所还书籍的名称...");
String str = scan.next();
int count = nameList.indexOf(str);
if (count >= 0) {
if (stateList.get(count).intValue() == 0) {
System.out.println("请输入还书时间(年-月-日)");
String timeStr = scan.next();
long mon = money(timeList.get(count), timeStr);
System.out.println("操作成功，欢迎下次再来......");
System.out.println("你的借书天数为：" + mon + "天 租金为：" + (mon*1) + "元");
timeList.set(count, "");
stateList.set(count, 1);
}else {
System.out.println("抱歉，此书从未借出过...");
}
}else {
System.out.println("此书没有从图书馆中借出，请核对...");
}
}
public long money(String date1,String date2){
//做时间差
//将String转为Date做计算yyyy-mm-dd是格式
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
long charge = 0;
try{
Date d1 = sd.parse(date1);
Date d2 = sd.parse(date2);
//时间也是以毫秒为单位。
charge = (d2.getTime() - d1.getTime()) / (1000*24*60*60);
}catch(ParseException e){
System.out.println(e);
}
return charge;
}
//排行榜
public void rankList(){
Object[] nameArr = nameList.toArray();
Object[] countArr = countBook.toArray();
int temp = 0;
String str = null;
for (int i = 0; i < countArr.length-1; i++) {
for (int j = 0; j < countArr.length-1-i; j++) {
if ((int)countArr[j] < (int)countArr[j+1]) {
temp = (int)countArr[j];
countArr[j] = (int)countArr[j+1];
countArr[j+1] = temp;
str = (String)nameArr[j];
nameArr[j] = (String)nameArr[j+1];
nameArr[j+1] = str;
}
}
}
System.out.println("序号\t"+"书名\t\t"+"\t"+"排行榜");
for (int i = 0; i < countArr.length; i++) {
System.out.println((i+1) + "\t" + nameArr[i] + "\t\t" + countArr[i]);
}
}
}
public class demo {
public static void main(String[] args) {
Book book = new Book();
//图书馆书籍初始化
book.initBook();
//图书馆管理系统核心方法
book.funtion();
}
}