目录
图书管理系统--versions1.0：
https://blog.csdn.net/qq_53483101/article/details/135583634?spm=1001.2014.3001.5501图书管理系统--versions2.0：
图书管理系统--versions3.0：
图书管理系统--versions4.0： 图书管理系统(使用IO流实现数据的读取和写入)--version4.0-CSDN博客文章浏览阅读342次，点赞8次，收藏9次。使用io实现图书管理系统中管理员用户、普通用户、书籍信息的读取和写入。https://blog.csdn.net/qq_53483101/article/details/136306379?spm=1001.2014.3001.5501
一、项目要求：
1）通过账号控制图书管理系统，账号分为管理员账号和普通用户账号
- 管理员账号和普通用户账号都可以使用手机号码+密码、身份证号码+密码的形式登录，登录方式二选一
2.管理员账号和普通账号除了手机号码、身份中号码、密码三个数据之外，还有姓名、性别、专业、住址信息
2）启动系统后，显示登录账号、注册账号、退出登录三个模块
a)登录账号：
1、显示管理员登录
2、用户登录两个模块
b)注册账号：
1、显示注册管理员
2、注册用户两个模块
c)退出登录：
结束程序运行
3）登录账号成功后，根据账号的性质来显示不同的模块：
登录管理员账号成功后，显示如下模块：
1、查看所有图书，图书显示哪些信息，这里设计的信息有书名，书的价格，书的数量
2、添加图书
3、修改图书
4、删除图书
5、查看所有普通用户信息
6、查看管理员账号信息
7、修改管理员账号信息
8、退出系统
登录普通账号成功后，显示如下模块：
1、查看所有图书，图书显示哪些信息，你自行设计
2、借阅图书
3、归还图书
4、显示用户信息（只能查看自己的用户信息）
5、修改用户信息（只能修改自己的用户信息）
6、退出系统
4）使用对象对不同类及其各自属性进行封装与功能实现
5）使用IO流实现数据的读取和写入
二、项目环境
（1）开发工具：IDEA、JDK17
（2）开发语言：Java
三、项目使用的知识点
（1）理解程序基本概念------程序、变量、数据类型
（2）顺序、选择、循环、跳转语句
（3）使用对象的思想对图书管理系统--versions1.0进行改造
这里使用了对象封装的思想，将其分为管理员用户类，普通用户，书类，工具类，系统主页面类，将各自的类的属性功能封装，在系统页面类里面调用这些属性方法实现各个功能的开发。
(4)使用io流实现了数据的读取和写入。
四、项目代码
这里说明一下，为了快速写出项目，前面的用户管理的八个属性均采用String类型存储，方便自己后续代码的编写及相关功能的实现，有不足或者想要自己实现的功能部分读者可以自行修改代码实现。
AdminUser类：
java
package com.iosystem;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;
public class AdminUser {
private String adminUser; //0
private String adminPhoneNumber; // 1
private String adminIdentityNumber; //2
private String adminPassword; //3
private String adminName;
private String adminSex;
private String adminCareer;
private String adminAddress;
public AdminUser() {
}
public AdminUser(String adminUser, String adminPhoneNumber, String adminIdentityNumber, String adminPassword, String adminName, String adminSex, String adminCareer, String adminAddress) {
this.adminUser = adminUser;
this.adminPhoneNumber = adminPhoneNumber;
this.adminIdentityNumber = adminIdentityNumber;
this.adminPassword = adminPassword;
this.adminName = adminName;
this.adminSex = adminSex;
this.adminCareer = adminCareer;
this.adminAddress = adminAddress;
}
public String getAdminUser() {
return adminUser;
}
public void setAdminUser(String adminUser) {
this.adminUser = adminUser;
}
public String getAdminPhoneNumber() {
return adminPhoneNumber;
}
public void setAdminPhoneNumber(String adminPhoneNumber) {
this.adminPhoneNumber = adminPhoneNumber;
}
public String getAdminIdentityNumber() {
return adminIdentityNumber;
}
public void setAdminIdentityNumber(String adminIdentityNumber) {
this.adminIdentityNumber = adminIdentityNumber;
}
public String getAdminPassword() {
return adminPassword;
}
public void setAdminPassword(String adminPassword) {
this.adminPassword = adminPassword;
}
public String getAdminName() {
return adminName;
}
public void setAdminName(String adminName) {
this.adminName = adminName;
}
public String getAdminSex() {
return adminSex;
}
public void setAdminSex(String adminSex) {
this.adminSex = adminSex;
}
public String getAdminCareer() {
return adminCareer;
}
public void setAdminCareer(String adminCareer) {
this.adminCareer = adminCareer;
}
public String getAdminAddress() {
return adminAddress;
}
public void setAdminAddress(String adminAddress) {
this.adminAddress = adminAddress;
}
Scanner scan = new Scanner(System.in);
//管理员用户登录验证
public int loginCheck(File file) throws IOException {
BufferedReader brd = new BufferedReader(new FileReader(file));
System.out.print("请输入你要登录的形式(1.手机号码+密码 2.身份证号码+密码)：");
int verifyNum = scan.nextInt(); //verifyNum 验证方式数字
//只能选择一种登录方式
while (true) {
if (verifyNum == 1 || verifyNum == 2) {
break;
} else {
System.out.print("\n输入错误，请输入要选择要操作的序号(只能输入1,2):");
verifyNum = scan.nextInt();
}
}
// 1.手机号码+密码 2.身份证号码+密码
System.out.print("请输入你要登录的管理员序号(0,1,2)：");
int adminId = scan.nextInt(); // 登录管理员账号序号
ArrayList<String> lines = new ArrayList<>();
String line;
while((line=brd.readLine())!=null){
lines.add(line);
}
int x = lines.size();
while(true){
if(adminId<=x-1){
break;
}else {
System.out.print("你输入的管理员账户不存在，请重新输入你要登录的管理员序号(0,1,2)：");
adminId = scan.nextInt(); // 登录管理员账号序号
}
}
String[] strings = lines.get(adminId).split(",");
if (verifyNum == 1) { // 管理员用户
// 管理员登录验证 手机号码+密码
System.out.println("\n---请输入你的验证信息---");
System.out.print("\n请输入管理员账号(默认root)：");
String adminUser1 = scan.next();
System.out.print("\n请输入手机号码");
String adminPhoneNumber1 = scan.next();
System.out.print("\n请输入密码：");
String adminPassword1 = scan.next();
while (true) {
if (adminUser1.equals(strings[0]) && adminPhoneNumber1.equals(strings[1]) && adminPassword1.equals(strings[3])) {
break;
} else {
System.out.println("输入信息错误，请重新输入信息！");
System.out.print("请输入管理员账号序号(默认root):");
adminUser1 = scan.next();
System.out.print("\n请输入手机号码:");
adminPhoneNumber1 = scan.next();
System.out.print("\n请输入密码:");
adminPassword1 = scan.next();
}
}
} else if (verifyNum == 2) { // 管理员登录验证 身份证号码+密码
System.out.print("请输入账号(默认root)：");
String adminUser2 = scan.next();
System.out.print("\n请输入身份证号码:");
String adminIdentityNumber2 = scan.next();
System.out.print("\n请输入密码:");
String adminPassword2 = scan.next();
while (true) {
if (adminUser2.equals(strings[0]) && adminIdentityNumber2.equals(strings[2]) && adminPassword2.equals(strings[3])) {
break;
} else {
System.out.println("输入信息错误，请重新输入信息！");
System.out.print("请输入账号(默认root):");
adminUser2 = scan.next();
System.out.print("\n请输入身份证号码:");
adminIdentityNumber2 = scan.next();
System.out.print("\n请输入密码:");
adminPassword2 = scan.next();
}
}
}
System.out.println("登录成功！");
brd.close();
return adminId;
}
// 注册管理员用户
public void addAdminUser(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> lines = new ArrayList<String>();
String line=null;
while((line = bufferedReader.readLine())!=null){
lines.add(line);
}
System.out.print("\n请输入新的管理员账户名:");
String user = scan.next();
System.out.print("\n请输入新的手机号码:");
String phonenumber = scan.next();
System.out.print("\n请输入新的身份证号码:");
String identitynumber = scan.next();
System.out.print("\n请输入新的密码:");
String password = scan.next();
System.out.print("\n请输入新的姓名:");
String name = scan.next();
System.out.print("\n请输入新的性别:");
String sex= scan.next();
System.out.print("\n请输入新的专业:");
String career= scan.next();
System.out.print("\n请输入新的住址信息:");
String address = scan.next();
line =user +","+ phonenumber +","+ identitynumber+","
+password+"," +name+"," + sex+","
+career+"," + address;
lines.add(line);
BufferedWriter bf = new BufferedWriter(new FileWriter(file));
for (String content :lines){
bf.write(content);
bf.newLine();
}
System.out.println("注册管理员用户成功！");
bf.flush();
bf.close();
bufferedReader.close();
}
//查看管理员账号信息
public void adminInfo(File file) throws IOException {
BufferedReader br = new BufferedReader(new FileReader(file));
System.out.println("序号\t\t\t"+"账户名\t\t\t"+"手机号\t\t\t"+"身份证号\t\t\t"+"密码\t\t\t"+"姓名\t\t\t"+"性别\t\t\t"+"专业\t\t\t"+"住址\t\t\t");
String line;
int count =0;
while ((line=br.readLine())!=null){
String[] strings = line.split(",");
System.out.print(count++ +"\t\t\t");
for(int i=0;i<strings.length;i++){
System.out.print(strings[i]+"\t\t\t");
}
System.out.print("\n");
}
br.close();
}
//修改管理员账号信息
// num 修改信息序号 id 登录的是第几个管理员
public void adminAlter(int num, int id, File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<String>();
String line =null;
int count=0;
while((line=bufferedReader.readLine())!=null){
if(count==id){
String[] strings = line.split(",");
if (num == 1) { // 管理员账号名
System.out.print("\n请输入新的管理员账户名:");
String user = scan.next();
strings[0] = user;
line = String.join(",",strings);
strb.add(line);
} else if (num == 2) { // 手机号码
System.out.print("\n请输入新的手机号码:");
String phonenumber = scan.next();
strings[1] = phonenumber;
line = String.join(",",strings);
strb.add(line);
} else if (num == 3) { // 身份证号码
System.out.print("\n请输入新的身份证号码:");
String identitynumber = scan.next();
strings[2] = identitynumber;
line = String.join(",",strings);
strb.add(line);
} else if (num == 4) { // 密码
System.out.print("\n请输入新的密码:");
String password = scan.next();
strings[3] = password;
line = String.join(",",strings);
strb.add(line);
} else if (num == 5) { // 姓名
System.out.print("\n请输入新的姓名:");
String name = scan.next();
strings[4] = name;
line = String.join(",",strings);
strb.add(line);
} else if (num == 6) { // 性别
System.out.print("\n请输入新的性别:");
String sex = scan.next();
strings[5] = sex;
line = String.join(",",strings);
strb.add(line);
} else if (num == 7) { // 专业
System.out.print("\n请输入新的专业:");
String career = scan.next();
strings[6] = career;
line = String.join(",",strings);
strb.add(line);
} else if (num == 8) { // 住址信息
System.out.print("\n请输入新的住址信息:");
String address = scan.next();
strings[7] = address;
line = String.join(",",strings);
strb.add(line);
}
System.out.println("修改成功！");
}else {
strb.add(line);
}
count++;
}
BufferedWriter bf = new BufferedWriter(new FileWriter(file));
for(String info:strb){
bf.write(info);
bf.newLine();
}
bf.flush();
bf.close();
bufferedReader.close();
}
}NormalUser类：
java
package com.iosystem;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;
public class NormalUser {
private String normalUser;
private String normalPhoneNumber;
private String normalIdentityNumber;
private String normalPassword;
private String normalName;
private String normalSex;
private String normalCareer;
private String normalAddress;
Scanner scan = new Scanner(System.in);
public NormalUser() {
}
public NormalUser(String normalUser, String normalPhoneNumber, String normalIdentityNumber, String normalPassword, String normalName, String normalSex, String normalCareer, String normalAddress) {
this.normalUser = normalUser;
this.normalPhoneNumber = normalPhoneNumber;
this.normalIdentityNumber = normalIdentityNumber;
this.normalPassword = normalPassword;
this.normalName = normalName;
this.normalSex = normalSex;
this.normalCareer = normalCareer;
this.normalAddress = normalAddress;
}
public String getNormalUser() {
return normalUser;
}
public void setNormalUser(String normalUser) {
this.normalUser = normalUser;
}
public String getNormalPhoneNumber() {
return normalPhoneNumber;
}
public void setNormalPhoneNumber(String normalPhoneNumber) {
this.normalPhoneNumber = normalPhoneNumber;
}
public String getNormalIdentityNumber() {
return normalIdentityNumber;
}
public void setNormalIdentityNumber(String normalIdentityNumber) {
this.normalIdentityNumber = normalIdentityNumber;
}
public String getNormalPassword() {
return normalPassword;
}
public void setNormalPassword(String normalPassword) {
this.normalPassword = normalPassword;
}
public String getNormalName() {
return normalName;
}
public void setNormalName(String normalName) {
this.normalName = normalName;
}
public String getNormalSex() {
return normalSex;
}
public void setNormalSex(String normalSex) {
this.normalSex = normalSex;
}
public String getNormalCareer() {
return normalCareer;
}
public void setNormalCareer(String normalCareer) {
this.normalCareer = normalCareer;
}
public String getNormalAddress() {
return normalAddress;
}
public void setNormalAddress(String normalAddress) {
this.normalAddress = normalAddress;
}
// 验证普通用户登录
public int loginCheck(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
// 普通用户登录验证
System.out.print("请输入你要登录的形式(1.手机号码+密码 2.身份证号码+密码)：");
int verifyNum = scan.nextInt(); //verifyNum 验证方式数字
//只能选择一种登录方式
while (true) {
if (verifyNum == 1 || verifyNum == 2) {
break;
} else {
System.out.print("\n输入错误，请重新输入要选择要操作的序号(只能输入1,2):");
verifyNum = scan.nextInt();
}
}
System.out.print("请输入你要登录的普通用户序号(0,1,2,3...)：");
int normalID = scan.nextInt(); // 登录普通用户账号序号
ArrayList<String> lines = new ArrayList();
String line ;
while((line=bufferedReader.readLine())!=null){
lines.add(line);
}
int x = lines.size();
// 1.手机号码+密码 2.身份证号码+密码
while(true){
if(normalID<=x-1){
break;
}else {
System.out.print("你输入的管理员账户不存在，请重新输入你要登录的普通用户序号(0,1,2,3...)：");
normalID = scan.nextInt(); // 登录管理员账号序号
}
}
String[] strings = lines.get(normalID).split(",");
if (verifyNum == 1) { // 普通用户
// 普通用户登录验证 手机号码+密码
System.out.print("\n请输入管理员账号(默认normal)：");
String normalUser1 = scan.next();
System.out.print("\n请输入手机号码");
String normalPhoneNumber1 = scan.next();
System.out.print("\n请输入密码：");
String normalPassword1 = scan.next();
while (true) {
if (normalUser1.equals(strings[0]) && normalPhoneNumber1.equals(strings[1]) && normalPassword1.equals(strings[3])) {
break;
} else {
System.out.println("输入信息错误，请重新输入！");
System.out.print("\n请输入管理员账号序号(默认normal)：");
normalUser1 = scan.next();
System.out.print("\n请输入手机号码:");
normalPhoneNumber1 = scan.next();
System.out.print("\n请输入密码:");
normalPassword1 = scan.next();
}
}
} else if (verifyNum == 2) { // 普通用户登录验证 身份证号码+密码
System.out.print("\n请输入账号(默认normal):");
String normalUser2 = scan.next();
System.out.print("\n请输入身份证号码:");
String normalIdentityNumber2 = scan.next();
System.out.print("\n请输入密码:");
String normalPassword2 = scan.next();
while (true) {
if (normalUser2.equals(strings[0]) && normalIdentityNumber2.equals(strings[2]) && normalPassword2.equals(strings[3])) {
break;
} else {
System.out.println("输入信息错误，请重新输入！");
System.out.print("\n请输入账号:");
normalUser2 = scan.next();
System.out.print("\n请输入身份证号码:");
normalIdentityNumber2 = scan.next();
System.out.print("\n请输入密码:");
normalPassword2 = scan.next();
}
}
}
System.out.println("登录成功！");
bufferedReader.close();
return normalID;
}
// 注册普通用户
public void addNormalUser(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<>();
String line=null;
while((line = bufferedReader.readLine())!=null){
strb.add(line);
}
System.out.print("\n请输入新的用户账户名:");
String user = scan.next();
System.out.print("\n请输入新的手机号码:");
String phonenumber = scan.next();
System.out.print("\n请输入新的身份证号码:");
String identitynumber = scan.next();
System.out.print("\n请输入新的密码:");
String password = scan.next();
System.out.print("\n请输入新的姓名:");
String name = scan.next();
System.out.print("\n请输入新的性别:");
String sex= scan.next();
System.out.print("\n请输入新的专业:");
String career= scan.next();
System.out.print("\n请输入新的住址信息:");
String address = scan.next();
String addString =user+","+phonenumber+","+identitynumber+","
+password+","+name+","+sex+","
+","+career+","+address;
strb.add(addString);
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
for(String info:strb){
bw.write(info);
bw.newLine();
}
System.out.println("注册成功！");
bw.flush();
bw.close();
bufferedReader.close();
}
// 查看所有普通用户信息
public void allNormal(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
System.out.println("所有普通用户信息如下:");
System.out.println("序号\t\t\t"+"账户名\t\t\t"+"手机号\t\t\t"+"身份证号\t\t\t"+"密码\t\t\t"+"姓名\t\t\t"+"性别\t\t\t"+"专业\t\t\t"+"住址\t\t\t");
String line = null;
String[] strings = null; // 存储一条用户信息
for(int i=0;(line=bufferedReader.readLine())!=null;i++){
strings = line.split(",");
if (line != "\n") {
System.out.print(i +"\t\t\t");
}
for(int j=0;j<strings.length;j++){
System.out.print(strings[j]+"\t\t\t");
}
System.out.print("\n");
}
bufferedReader.close();
}
// 修改用户信息
// num 修改信息序号 id 登录的是第几个管理员
public void normalAlter(int num,int normalid,File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<>();
String line =null;
int count=0;
while((line=bufferedReader.readLine())!=null){
if(count==normalid){
String[] strings = line.split(",");
if(num ==1){ // 管理员账号名
System.out.print("\n请输入新的管理员账户名:");
String user = scan.next();
strings[0] = user;
} else if (num ==2) { // 手机号码
System.out.print("\n请输入新的手机号码:");
String phonenumber = scan.next();
strings[1]=phonenumber;
} else if (num ==3) { // 身份证号码
System.out.print("\n请输入新的身份证号码:");
String identitynumber = scan.next();
strings[2] = identitynumber;
} else if (num ==4) { // 密码
System.out.print("\n请输入新的密码:");
String password = scan.next();
strings[3] = password;
} else if (num ==5) { // 姓名
System.out.print("\n请输入新的姓名:");
String name = scan.next();
strings[4]=name;
} else if (num ==6) { // 性别
System.out.print("\n请输入新的性别:");
String sex= scan.next();
strings[5] = sex;
} else if (num ==7) { // 专业
System.out.print("\n请输入新的专业:");
String career= scan.next();
strings[6] = career;
} else if (num ==8) { // 住址信息
System.out.print("\n请输入新的住址信息:");
String address = scan.next();
strings[7] = address;
}
line = String.join(",", strings);
strb.add(line);
System.out.println("修改成功");
}else {
strb.add(line);
}
count++;
}
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
for(String info: strb){
bw.write(info);
bw.newLine();
}
bw.flush();
bw.close();
bufferedReader.close();
}
// 显示用户信息（只能查看自己的用户信息）
public void myInformation(int normalId,File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
String line=null;
System.out.println("个人信息如下：");
System.out.println("账户名\t\t\t"+"手机号\t\t\t"+"身份证号\t\t\t"+"密码\t\t\t"+"姓名\t\t\t"+"性别\t\t\t"+"专业\t\t\t"+"住址\t\t\t");
int count=0;
while((line = bufferedReader.readLine())!=null){
if(count==normalId){
String[] strings = line.split(",");
for(int j=0;j<strings.length;j++){
System.out.print(strings[j]+"\t\t\t");
}
System.out.print("\n");
}
count++;
}
System.out.println("查看结束");
bufferedReader.close();
}
}Book类：
java
package com.iosystem;
import java.io.*;
import java.util.ArrayList;
import java.util.Scanner;
public class Book {
private String bookName;
private String bookPrice;
private String bookNum;
Scanner scan = new Scanner(System.in);
public Book() {
}
public Book(String bookName, String bookPrice, String bookNum) {
this.bookName = bookName;
this.bookPrice = bookPrice;
this.bookNum = bookNum;
}
public String getBookName() {
return bookName;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public String getBookPrice() {
return bookPrice;
}
public void setBookPrice(String bookPrice) {
this.bookPrice = bookPrice;
}
public String getBookNum() {
return bookNum;
}
public void setBookNum(String bookNum) {
this.bookNum = bookNum;
}
// 查看所有图书
public void viewAllBook(File file) throws IOException {
System.out.println("序号\t\t\t书名\t\t\t价格\t\t\t数量");
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
String line = null;
for(int i=0;(line=bufferedReader.readLine())!=null;i++){
String[] strings = line.split(",");
System.out.print(i +"\t\t\t");
for(int j=0;j<strings.length;j++){
System.out.print(strings[j]+"\t\t\t");
}
System.out.print("\n");
}
bufferedReader.close();
}
// 添加图书
public void addBook(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<>();
System.out.print("\n请输入图书名：");
String name = scan.next();
System.out.print("\n请输入图书价格：");
String price = scan.next();
System.out.print("\n请输入图书数量：");
String num = scan.next();
String addBook =name+","+price+","+num;
String line =null;
while((line = bufferedReader.readLine())!=null){
strb.add(line);
}
strb.add(addBook);
BufferedWriter bw = new BufferedWriter(new FileWriter(file));;
for(String info:strb){
bw.write(info);
bw.newLine();
}
bw.flush();
bw.close();
bufferedReader.close();
System.out.println("添加图书成功！");
}
// 修改图书
public void alterBook(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<>();
String line = null;
int count=0;
System.out.print("请输入修改图书序号:");
int bookID=scan.nextInt(); //修改图书序号
while((line = bufferedReader.readLine())!=null){
if(count == bookID){
String[] strings = line.split(",");
System.out.print("\n请输入图书名：");
String name = scan.next();
strings[0] = name;
System.out.print("\n请输入图书价格：");
String price = scan.next();
strings[1] = price;
System.out.print("\n请输入图书数量：");
String num = scan.next();
strings[2] = num;
line =String.join(",", strings);
strb.add(line);
System.out.println("修改图书成功！");
}else {
strb.add(line);
}
count++;
}
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
for(String info: strb){
bw.write(info);
bw.newLine();
}
bw.flush();
bw.close();
bufferedReader.close();
}
// delete 删除图书
public void deleteBook(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<>();
System.out.println("请输入删除图书序号：");
int bookID=scan.nextInt(); //修改图书序号
String line = null;
while((line = bufferedReader.readLine())!=null){
strb.add(line);
}
int x = strb.size();
while(true){
if (bookID >= 0 &&bookID < x) {
break;
}else {
System.out.println("输入错误,请重新输入删除图书序号：");
bookID=scan.nextInt(); //修改图书序号
}
}
// 集合中删除图书
strb.remove(bookID);
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
for(String info :strb){
bw.write(info);
bw.newLine();
}
System.out.println("删除图书成功！");
bw.flush();
bw.close();
bufferedReader.close();
}
// 借阅图书
public void borrowBook(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<>();
System.out.print("\n请输入你要借阅图书序号：");
int numbook = scan.nextInt();
String line =null;
int count=0;
while((line = bufferedReader.readLine())!=null){
if(count ==numbook){
String[] strings = line.split(",");
System.out.print("\n该图书还有"+strings[2]+"本");
System.out.print("\n请输入你要借的图书数量:");
int nums = scan.nextInt(); // 借阅数量
int bookNum =Integer.parseInt(strings[2]);
if((bookNum-nums)>=0){
bookNum-=nums;
String strNum = String.valueOf(bookNum);
strings[2] = strNum;
line = String.join(",", strings);
strb.add(line);
System.out.print("\n恭喜你借阅成功，该图书还剩余"+bookNum+"本\n");
}else{
System.out.print("\n很遗憾，该图书已经全被借阅！");
}
}else {
strb.add(line);
}
count++;
}
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
for(String info : strb){
bw.write(info);
bw.newLine();
}
bw.flush();
bw.close();
bufferedReader.close();
}
// 归还图书
public void giveBackBook(File file) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
ArrayList<String> strb = new ArrayList<>();
System.out.print("\n请输入你要归还图书序号：");
int bk = scan.nextInt();
String line = null;
int count=0;
while((line = bufferedReader.readLine())!=null){
if(count == bk){
String[] strings = line.split(",");
System.out.print("\n该图书目前剩余"+strings[2]+"本");
System.out.print("\n请输入归还书本数目:");
int givenum = scan.nextInt();
int sum=Integer.parseInt(strings[2])+givenum;
strings[2] = String.valueOf(sum);
line = String.join(",",strings);
strb.add(line);
System.out.print("\n恭喜你归还成功,现剩余该图书"+sum+"本");
}else {
strb.add(line);
}
count++;
}
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
for (String info: strb){
bw.write(info);
bw.newLine();
}
bw.flush();
bw.close();
bufferedReader.close();
}
}Tool类：
java
package com.iosystem;
public class Tool {
public void page1(){
System.out.println("----------------请选择登录方式----------------");
System.out.println(" 1、登录账号");
System.out.println(" 2、注册账号");
System.out.println(" 3、退出登录");
}
public void page2(){
System.out.println("********欢迎进入登录账号页面********");
System.out.println("1.管理员登录:");
System.out.println("2.普通用户登录:");
}
public void page3(){
System.out.println("\n-----------欢迎进入管理员账号页面-----------");
System.out.println("1、查看所有图书");
System.out.println("2、添加图书");
System.out.println("3、修改图书");
System.out.println("4、删除图书");
System.out.println("5、查看所有普通用户信息");
System.out.println("6、查看管理员账号信息");
System.out.println("7、修改管理员账号信息");
System.out.println("8、退出系统");
}
public void page4(){
System.out.println("\n-----------普通用户登录成功-----------");
System.out.println("1.查看所有图书");
System.out.println("2.借阅图书");
System.out.println("3.归还图书");
System.out.println("4.显示用户信息（只能查看自己的用户信息）");
System.out.println("5.修改用户信息（只能修改自己的用户信息）");
System.out.println("6.退出系统");
}
public void page5(){
System.out.println("********欢迎进入注册账号页面********");
System.out.println("1.管理员注册:");
System.out.println("2.普通用户注册:");
}
}BooksManagementSystemThree类：
java
package com.iosystem;
import java.io.File;
import java.io.IOException;
import java.util.Scanner;
public class BooksManagementSystemNew {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
Tool tool = new Tool();
AdminUser adminUser= new AdminUser();
Book book = new Book();
NormalUser normalUser = new NormalUser();
File adminUL = new File("E:\\Java Code base\\FoodOrderingSystem\\src\\com\\Admin.txt");
File bookL = new File( "E:\\Java Code base\\FoodOrderingSystem\\src\\com\\Book.txt");
File normalUL = new File("E:\\Java Code base\\FoodOrderingSystem\\src\\com\\Normal.txt");
while(true){
while(true) {
tool.page1();
System.out.print("请输入要选择要操作的序号(只能输入1,2,3):");
int loginNum = scan.nextInt();
// 校验输入的序号，只能是1到3
while (true) {
if (loginNum == 1 || loginNum == 2 || loginNum == 3) {
break;
} else {
System.out.print("请输入要选择要操作的序号(只能输入1,2,3):");
loginNum = scan.nextInt();
}
}
switch(loginNum){
case 1:
tool.page2();
System.out.print("请输入要选择要操作的序号(只能输入1,2):");
int enterNum =scan.nextInt(); //enterNum登录数字 1.管理员 2.用户
while(true){
if(enterNum == 1||enterNum == 2 ){
break;
}else{
System.out.print("输入错误，请从从新输入要选择要操作的序号(只能输入1,2):");
enterNum =scan.nextInt();
}
}
if(enterNum==1){
int adminID = 0;
try {
adminID = adminUser.loginCheck(adminUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
while(true) {
tool.page3();
System.out.print("请输入你选择的功能:");
int adminnum = scan.nextInt(); // adminnum 管理员账号页面功能查看
while(true){
if(adminnum>=1&&adminnum<=8){
break;
}else{
System.out.print("输入错误,请重新输入你选择的功能:");
adminnum = scan.nextInt();
}
}
if(adminnum ==1){ //1、查看所有图书
try {
book.viewAllBook(bookL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (adminnum==2) { //2、添加图书
try {
book.addBook(bookL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (adminnum==3) { //3、修改图书 //这里设计的是符合图书序号的所有图书信息都可以修改
try {
book.alterBook(bookL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (adminnum==4) { //4、删除图书
try {
book.deleteBook(bookL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (adminnum==5) { //5、查看所有普通用户信息
try {
normalUser.allNormal(normalUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (adminnum==6) { //6、查看管理员账号信息
try {
adminUser.adminInfo(adminUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (adminnum==7) { //7、修改管理员账号信息
System.out.println("请输入要修改管理员账号的的信息(1管理员账号名2手机号码3" +
"身份证号码4密码5姓名6性别7专业8住址信息):");
int adID =scan.nextInt(); // adID 修改序号
try {
adminUser.adminAlter(adID, adminID,adminUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
}else if (adminnum==8){ //8、退出系统
System.out.println("谢谢使用，欢迎下次光临！");
System.exit(0);;
}
}
} else if (enterNum == 2) {
int normalID = 0;
try {
normalID = normalUser.loginCheck(normalUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
while(true){
tool.page4();
System.out.print("请输入你需要操作功能的数字：");
int onetwo1 = scan.nextInt(); // 选择功能数字
if(onetwo1==1){ // 1.查看所有图书
try {
book.viewAllBook(bookL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (onetwo1==2) { // 2.借阅图书
try {
book.borrowBook(bookL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (onetwo1==3) { // 3.归还图书
try {
book.giveBackBook(bookL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (onetwo1==4) { // 4.显示用户信息（只能查看自己的用户信息）
try {
normalUser.myInformation(normalID,normalUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (onetwo1==5) { // 5.修改用户信息（只能修改自己的用户信息）
System.out.print("\n请输入你要修改的信息的选项(1普通用户账号名2手机号码" +
"3身份证号码4密码5姓名6性别7专业8住址信息):");
int num=scan.nextInt(); // normalchange 修改序号
try {
normalUser.normalAlter( num, normalID,normalUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (onetwo1==6) { // 6.退出系统
System.out.print("\n谢谢使用，欢迎下次光临！");
System.exit(0);;
}
}
}
case 2:
tool.page5();
System.out.print("请输入要选择要操作的序号(只能输入1,2):");
int registernum = scan.nextInt(); //注册管理员或者普通用户
while(true){
if(registernum>0||registernum<3){
break;
}else {
System.out.println("输入序号错误，请重新输入要操作的序号(只能输入1,2):");
registernum = scan.nextInt();
}
}
if(registernum==1){
try {
adminUser.addAdminUser(adminUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
} else if (registernum==2) {
try {
normalUser.addNormalUser(normalUL);
} catch (IOException e) {
throw new RuntimeException(e);
}
continue;
}
case 3:
System.out.println("谢谢使用，欢迎下次光临！");
System.exit(0);;
}
}
}
}
}初始化相关txt文件：
Admin.txt
java
root,1111,2222,123456,lisi,男,计算机,安徽Normal.txt
java
normal,1234,5678,654321,梦洛,女,艺术,北京Book.txt
java
C语言,50.0,58
Python,50.0,50五、项目运行结果
说明一下：这里并没有校验输入数据限制，是没写，太麻烦了，读者想要校验输入格式可以自行实现。
说明：这里进行了完成的功能展示。
普通用户注册：
查看Normal.txt文件
普通用户登录功能查看：
功能1：查看所有图书
功能2：借阅图书
验证图书数目是否减少响应数目：
功能3：归还图书
验证图书归还后数目是否正确：
功能4：显示用户信息
功能5：修改用户信息
查看用户信息是否修改成功：
功能6：退出系统：
管理员账户注册：
注册是否成功，查看Admin.txt
管理员用户功能查看：
1查看所有图书：
2添加图书
3修改图书
4删除图书
5查看所有普通用户信息
6查看管理员账号信息
7修改管理员账号信息
8退出登录
六、项目难点分析
1、校验功能数字是自己规定的数字
使用while(true){}循环实现，在循环体中设置只有输入规定数字才能跳出循环，执行后面的代码。
javaSystem.out.print("请输入要选择要操作的序号(只能输入1,2):"); int enterNum =scan.nextInt(); //enterNum登录数字 1.管理员 2.用户 while(true){ if(enterNum == 1||enterNum == 2 ){ break; }else{ System.out.print("输入错误，请从从新输入要选择要操作的序号(只能输入1,2):"); enterNum =scan.nextInt(); } }2、明确变量的定义域
要清楚自己定义的变量作用的范围：
在Java中，变量的作用域决定了变量在程序中可见的范围。如果一个变量被定义在一个代码块内部，那么它的作用域就被限制在该代码块内部。如果一个变量被定义在方法内部，那么它的作用域就被限制在该方法内部。如果一个变量被定义在类内部但方法之外，那么它的作用域就是整个类。
这里要注意的是，作用范围大的变量，例如adminUser、bookName...等等，要定义在整个循环体的外面，若是定义在while(){}、for(;;){}、do{}while()三种循环和if(){}else{}、switch(){}选择语句中变量，作用域只能在循环体或者选择语句中，只用在循环体或者选择语句中使用，此范围之外，不能使用，或者可能出现操作该变量失效的现象。
3、将其划分为不同的类，在不同类里面进行不同类单独的属性方法的开发与封装。
4、文件的读取和写入
这里必须完成数据的读取才能创建写入操作,若FileRead和FileWriter：
javaFileRead fileRead = new FileRead(file); FileWriter fileWriter = new FileWriter(File);以上述方式同时创建，这两个线程同时创建，FileWriter会打开一个空文件，会把原本文件中的数据全部清空，这样FileReader对象读取时会读取一个空文件，不会返回任何内容，造成Bug，所以必须在读取文件所有内容和对内容的操作完成之后创建FileWriter对象。