目录
一、项目要求:
二、项目环境
三、项目使用的知识点
四、项目代码
五、项目运行结果
六、项目难点分析
图书管理系统--versions1.0:
图书管理系统--versions1.0-CSDN博客文章浏览阅读981次,点赞29次,收藏17次。本文使用了变量,数据类型,顺序,选择,循环,数组实现了一个简单的小项目--图书管理系统,其中包括用户管理,图书管理,不同权限管理的内容不同。https://blog.csdn.net/qq_53483101/article/details/135583634?spm=1001.2014.3001.5501https://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--versions2.0-CSDN博客文章浏览阅读1k次,点赞35次,收藏19次。本文使用了变量,数据类型,顺序,选择,循环,数组,对象及属性的封装实现了一个简单的小项目--图书管理系统,其中包括用户管理,图书管理,不同权限管理的内容不同。https://blog.csdn.net/qq_53483101/article/details/135728923?spm=1001.2014.3001.5501https://blog.csdn.net/qq_53483101/article/details/135728923?spm=1001.2014.3001.5501
图书管理系统--versions3.0:
图书管理系统(ArrayList和LinkedList)--versions3.0-CSDN博客本文使用了变量,数据类型,顺序,选择,循环,对象及属性的封装,使用ArrayList和LinkedList集合,实现了一个简单的小项目--图书管理系统,其中包括用户管理,图书管理,不同权限管理的内容不同。https://blog.csdn.net/qq_53483101/article/details/135939196?spm=1001.2014.3001.5501https://blog.csdn.net/qq_53483101/article/details/135939196?spm=1001.2014.3001.5501
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
1. 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:
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:
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:
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:
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:
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
root,1111,2222,123456,lisi,男,计算机,安徽
Normal.txt
normal,1234,5678,654321,梦洛,女,艺术,北京
Book.txt
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。
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(); } }
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:
FileRead 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。