Java實戰(zhàn)之基于I/O流設(shè)計的圖書管理系統(tǒng)
更新時間：2021年04月20日 15:00:46 作者：沒譜的曲
這篇文章主要介紹了Java實戰(zhàn)之基于I/O流設(shè)計的圖書館管理系統(tǒng),文中有非常詳細的代碼示例,對正在學(xué)習(xí)java的小伙伴們有非常好的幫助,需要的朋友可以參考下
一、前言
當(dāng)前，我還沒有學(xué)到數(shù)據(jù)庫相關(guān)的知識，想要完全通過Java來完成一個可以存儲數(shù)據(jù)的圖書館管理系統(tǒng)就只能使用I/O流的知識，將內(nèi)容都保存到文件中，再進行增刪改查的操作，這就很考驗我們的Java基礎(chǔ)知識掌握能力。
二、項目介紹
- Java基本語法的掌握
- 流程控制語句的熟練使用
- 面向?qū)ο笏枷氲睦斫?/li>
- 能否熟練使用封裝、繼承、多態(tài)
- 接口、異常的熟悉
- 集合的使用
- 是否熟悉掌握I/O流相關(guān)操作
三、項目說明
- 傳統(tǒng)的人工管理圖書館流程繁瑣，我們需求設(shè)計一個圖書館管理系統(tǒng)來方便學(xué)生借書以及管理員管理書籍
- 系統(tǒng)功能分為：讀者信息管理模塊、圖書信息管理模塊、圖書借閱管理模塊、基礎(chǔ)信息維護模塊和用戶管理模塊。
- 讀者信息管理：能對讀者基本信息管理，如：新增讀者、信息修改、查詢
- 圖書信息管理：能管理圖書基本信息，如新增圖書、刪除圖書、查詢圖書等
- 圖書借閱信息管理：能對借閱信息進行記錄，包括讀者信息、圖書信息、借閱時間等。
- 圖書歸還信息管理：能對圖書歸還信息進行判斷，是否超出借閱時間，罰金為多少
四、項目實現(xiàn)
代碼部分如下：
Person類：
package User;
public class Person {
public String name;//姓名
public String sex;//性別
public int age;//年齡
public Person() {
}
public Person(String name, String sex, int age) {
this.name = name;
this.sex = sex;
this.age = age;
}
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getSex() {
return sex;
}
public void setAge(int age) {
this.age = age;
}
public int getAge() {
return age;
}
}
Book類：
package Book;
public class Book {
private String bookName; //書名
private String author; //作者
public double price; //價格
private String category; //分類
public String press;//出版社
private String state; //狀態(tài) true-已借出 false-未借出
private String borrowName;
private String borrowTime;
public Book() {
}
public Book(String bookName, String author, double price, String category, String press, String state, String borrowName, String borrowTime) {
this.bookName = bookName;
this.author = author;
this.price = price;
this.category = category;
this.press = press;
this.state = state;
this.borrowName = borrowName;
this.borrowTime = borrowTime;
}
public String getName() {
return bookName;
}
public void setName(String bookName) {
this.bookName = bookName;
}
public String getAuthor() {
return author;
}
public void setAuthor(String author) {
this.author = author;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public String getPress() {
return press;
}
public void setPress(String press) {
this.press = press;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getBorrowName() {
return borrowName;
}
public void setBorrowName(String borrowName) {
this.borrowName = borrowName;
}
public String getBorrowTime() {
return borrowTime;
}
public void setBorrowTime(String borrowTime) {
this.borrowTime = borrowTime;
}
@Override
public String toString() {
return bookName + "," + author + "," + price + "," + category + "," + press + "," + state + "," + borrowName + "," + borrowTime;
}
}
Library類：
package Library;
import java.io.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;
import User.User;
import User.Admin;
public class Library {
Scanner sc = new Scanner(System.in);
private String operator;
//用戶注冊登錄
public void Interface() throws IOException, ParseException {
boolean a = true;
File file = new File("用戶信息.txt");
try {
while (a) {
System.out.println("==================圖書管理系統(tǒng)==================");
System.out.println("請登錄：1.普通用戶 2.管理員登錄 3.注冊 4.退出系統(tǒng)");
int i = sc.nextInt();
if (i < 1 || i > 4) {
System.out.println("到底能不能行？能不能看明白了再輸！");
} else if (i == 4) {
a = false;
} else if (i == 1) {
//普通用戶登錄
System.out.println("請輸入您的用戶名：");
operator = sc.next();
System.out.println("請輸入您的密碼：");
String password = sc.next();
FileInputStream intput = new FileInputStream(file);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
//判斷輸入的用戶名是否存在
boolean flag = false;
String[] userinf = new String[5];
for (String user : list) {
userinf = user.split(",");
if (operator.equals(userinf[0])) { //判斷用戶名是否存在
flag = true;
break;
}
}
//如果存在，判斷密碼是否正確
if (flag == true) {
if (password.equals(userinf[1])) {
System.out.println("登陸成功");
//寫日志
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String returnTime = sdf.format(nowDate);
File file2 = new File("日志.txt");
FileWriter fw1 = new FileWriter(file2, true);
fw1.write(returnTime + " " + operator + "登錄了");
fw1.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw1.close();
//登錄
try {
User user = new User();
user.operation(userinf, operator);
} catch (Exception e) {
System.out.println("到底能不能行？能不能看明白了再輸！");
User user = new User();
user.operation(userinf, operator);
}
} else {
System.out.println("密碼錯誤");
}
} else {
System.out.println("用戶名不存在");
}
intput.close();
reader.close();
} else if (i == 2) {
//管理員登錄
System.out.println("請輸入管理員密碼！");
String rootPassword = sc.next();
if (rootPassword.equals("88888888")) {
//管理員登錄成功
System.out.println("管理員登陸成功！");
try {
Admin admin = new Admin();
admin.admin();
} catch (Exception e) {
System.out.println("到底能不能行？能不能看明白了再輸！");
Admin admin = new Admin();
admin.admin();
}
} else {
System.out.println("你是不是管理員心里沒個ACD數(shù)嗎？");
}
} else if (i == 3) {
//注冊
System.out.println("請輸入用戶名：");
String name = sc.next();
//查找是否有同名用戶
FileInputStream intput = new FileInputStream(file);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
String[] userinf = new String[5];
boolean flag = false;
for (String user : list) {
userinf = user.split(",");
if (name.equals(userinf[0])) { //判斷用戶名是否存在
flag = true;
System.out.println("該用戶名已存在，請重新擬取名稱");
break;
}
}
if (flag == false) {
System.out.println("請輸入密碼：");
String password = sc.next();
String sex;
while (true) {
System.out.println("請輸入您的性別：");
sex = sc.next();
if (sex.equals("男") || sex.equals("女")) {
break;
} else {
System.out.println("請輸入正確的性別！");
}
}
System.out.println("請輸入您的年齡：");
int age = sc.nextInt();
if (age < 10) {
System.out.println("您的年齡太小啦！請讓家長使用賬號幫您借閱書籍！");
break;
}
long phone;
while (true) {
System.out.println("請輸入您的電話號碼：");
phone = sc.nextInt();
if (phone < 0) {
System.out.println("請輸入正確的電話號碼！");
} else {
break;
}
}
User u = new User(name, sex, age, phone, password);
file.createNewFile();
FileWriter fw = new FileWriter(file, true);
fw.write(u.toString());
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
System.out.println("恭喜您，注冊成功！");
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String returnTime = sdf.format(nowDate);
File file1 = new File("日志.txt");
FileWriter fileWriter = new FileWriter(file1, true);
fileWriter.write(returnTime + " 注冊了新用戶:" + name);
fileWriter.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fileWriter.close();
}
}
}
} catch (Exception e) {
System.out.println("到底能不能行？能不能看明白了再輸！");
Library library = new Library();
library.Interface();
return;
}
}
}
添加書籍AddBook：
package Book;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class AddBook {
public void addBook() throws IOException {
Scanner sc = new Scanner(System.in);
File file = new File("書籍.txt");
System.out.println("請輸入書名：");
String bookName = sc.next();
//查找是否有同名書籍
FileInputStream intput = new FileInputStream(file);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
String[] bookinf = new String[8];
boolean flag = false;
for (String user : list) {
bookinf = user.split(",");
if (bookName.equals(bookinf[0])) { //判斷書籍是否存在
flag = true;
System.out.println("該書籍已存在，小圖書館不整這么多一樣的書了，浪費錢！");
break;
}
}
if (flag == false) {
System.out.println("請輸入作者：");
String author = sc.next();
double price;
while (true) {
System.out.println("請輸入書籍價格：");
price = sc.nextDouble();
if (price < 10) {
System.out.println("這么便宜？要不然直接白送？能不能合理一點？");
} else if (price > 500) {
System.out.println("這河里嗎？這么金貴的書你舍得借嗎？這么小個圖書館放這么貴的書河里嗎？");
} else {
break;
}
}
System.out.println("請輸入書籍類型：");
String category = sc.next();
System.out.println("請輸入書籍的出版社：");
String press = sc.next();
String state = "false";
String borrowName = "無";
String borrowTime = "null";
Book book = new Book(bookName, author, price, category, press, state, borrowName, borrowTime);
file.createNewFile();
FileWriter fw = new FileWriter(file, true);
fw.write(book.toString());
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
System.out.println("恭喜您，添加書籍成功！");
}
}
}
借閱書籍BorrowBook：
該類中使用了修改文本中特定字符串的內(nèi)容的方法，該方法的使用探討我已經(jīng)寫成博文發(fā)布，可以點擊以下鏈接進行查看：Java中查找文本中特定內(nèi)容后進行修改
package Book;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;
public class BorrowBook {
Scanner scanner = new Scanner(System.in);
public void borrowBook(String operator) throws IOException {
String filePath = "書籍.txt";
BorrowBook modifyFile = new BorrowBook();
File bookFile = new File("書籍.txt");
//根據(jù)書籍名稱查詢到需要修改的書籍?dāng)?shù)據(jù)
FileInputStream intput = new FileInputStream(bookFile);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString = null;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
boolean flag = false;
String[] bookinf = new String[8];
System.out.println("=======================當(dāng)前可借閱書籍有=======================");
int i = 0;
for (String user : list) {
bookinf = user.split(",");
if (bookinf[5].equals("false")) {
System.out.print(" | " + bookinf[0] + " |");
i++;
if (i % 5 == 0) {
System.out.println("");
System.out.println("==========================================================");
}
}
}
if (i % 5 != 0) {
System.out.println("");
System.out.println("==========================================================");
}
System.out.println("請輸入要借閱的書籍名稱：");
String bookName = scanner.next();
for (String user : list) {
bookinf = user.split(",");
if (bookName.equals(bookinf[0])) { //判斷書籍是否存在
flag = true;
System.out.println("書名：" + bookinf[0] + ",作者：" + bookinf[1] + ",價格：" + bookinf[2] +
",類型：" + bookinf[3] + ",出版社：" + bookinf[4] + ",是否被借出：" + bookinf[5]);
break;
}
}
if (flag == false) {
System.out.println("沒有查找到該書籍，請重新確認(rèn)后再進行查找！");
return;
}
//修改書籍?dāng)?shù)據(jù)后，重新寫入文件
if (bookName.equals(bookinf[0]) && bookinf[5].equals("false")) {
boolean result = modifyFile.writeFile(filePath, modifyFile.readFileContent(bookinf, filePath, "false", "true"));
// 修改文件中借閱狀態(tài)
if (result == true) {
//獲取借書人后寫入“無”
modifyFile.writeFile(filePath, modifyFile.readFileContent(bookinf, filePath, "無", operator));
//獲取時間后寫入最后一位
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String borrowTime = sdf.format(nowDate);
modifyFile.writeFile(filePath, modifyFile.readFileContent(bookinf, filePath, "null", borrowTime));
System.out.println("借閱成功！");
// System.out.println("借閱時間：" + borrowTime + "，最多可借閱7天，請記得按時歸還!");
System.out.println("借閱時間：" + borrowTime + "，最多可借閱20秒，請記得按時歸還!");//為方便測試，將借閱時間設(shè)置為20秒
//寫日志
File file = new File("日志.txt");
FileWriter fw = new FileWriter(file, true);
fw.write(borrowTime + " " + operator + "借走了圖書：" + bookinf[0]);
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
return;
}
} else {
System.out.println("該書已被借出或不存在，請重新查詢后再進行借閱！");
}
}
// 讀文件
public String readFileContent(String[] bookinf, String filePath, String oldString, String newString) {
Scanner sc = new Scanner(System.in);
BufferedReader br = null;
String line = null;
StringBuffer bufAll = new StringBuffer();// 保存修改過后的所有內(nèi)容
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "UTF-8"));
while ((line = br.readLine()) != null) {
StringBuffer buf = new StringBuffer();
// 修改內(nèi)容核心代碼
String[] bookinf2 = line.split(",");
if (bookinf2[0].equals(bookinf[0])) {//判斷條件根據(jù)自己的要求修改
buf.append(line);
int indexOf = line.indexOf(oldString);
buf.replace(indexOf, indexOf + oldString.length(), newString);// 修改內(nèi)容
buf.append(System.getProperty("line.separator"));// 添加換行
bufAll.append(buf);
} else {
buf.append(line);
buf.append(System.getProperty("line.separator"));
bufAll.append(buf);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (Exception e) {
br = null;
}
}
}
return bufAll.toString();
}
// 寫文件
public boolean writeFile(String filePath, String content) {
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath), "UTF-8"));
bw.write(content);
bw.flush();
} catch (Exception e) {
e.printStackTrace();
return false;
} finally {
if (bw != null) {
try {
bw.close();
} catch (IOException e) {
bw = null;
}
}
}
return true;
}
}
刪除書籍DeleteBook：
關(guān)于刪除書籍中的刪除文本文件中精確的某一行的方法詳解可以參考我之前寫過的博文：Java中刪除文本文件中特定行的內(nèi)容
package Book;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class DeleteBook {
private String bookDelete;
String[] bookinf = new String[8];
String[] bookinf1 = new String[8];
public void deleteBook() throws IOException {
File file = new File("書籍.txt");
FileInputStream intput = new FileInputStream(file);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString;//定義一個字符串，每一次讀出該行字符串內(nèi)容
List<String> list = new ArrayList<>();//定義一個list字符串集合用來儲存每一行的字符串信息
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
System.out.println("==========當(dāng)前書籍有==========");
//遍歷字符串集合
for (String book : list) {
bookinf = book.split(",");//將‘,‘作為分隔符，將字符串分隔開存放進入數(shù)組中
System.out.print(bookinf[0] + " ");
}
System.out.println("");
//輸入要刪除的內(nèi)容
System.out.println("請輸入要刪除的書籍名稱：");
Scanner scanner = new Scanner(System.in);
bookDelete = scanner.next();
//查詢該用戶是否有未歸還的書籍，如果存在未歸還的書籍，將不能刪除該用戶的信息
FileInputStream inputStream = new FileInputStream(file);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String bookString;
List<String> bookList = new ArrayList<>();
while ((bookString = bufferedReader.readLine()) != null) {
bookList.add(bookString);
}
boolean have = false;//是否存在書籍
for (String borrowUser : bookList) {
bookinf = borrowUser.split(",");
//判斷書籍是否存在
if (bookDelete.equals(bookinf[0])) {
have = true;
}
//若該書籍存在，判斷書籍對應(yīng)用戶位是否存在用戶
//若對應(yīng)位用戶不為“無”，則表示該書籍有人借出，則無法刪除該書籍
//同時告知管理員（打印）該書籍被哪位用戶借出尚未歸還
if (!"無".equals(bookinf[6]) && have) {
System.out.println("該書籍尚未被用戶“" + bookinf[6] + "”歸還，請在其歸還書籍后再進行操作！");
return;
}
}
if (have == false) {
System.out.println("無法找到該書籍，請重新確認(rèn)后再進行操作！");
return;
}
for (String delBook : list) {
bookinf1 = delBook.split(",");
//找到即將刪除的書籍在集合中的位置，將該部分內(nèi)容從集合中刪除，然后清空整個文件
if (bookDelete.equals(bookinf1[0])) {
list.remove(delBook);//在集合中刪除該行
FileWriter fd = new FileWriter(file, false);//append傳入false表示寫入內(nèi)容時將會覆蓋文件中之前存在的內(nèi)容
fd.write("");//執(zhí)行刪除操作，寫入空內(nèi)容覆蓋之前的內(nèi)容
fd.close();
break;
}
}
//重新遍歷一遍更改后的集合，將內(nèi)容重新寫入文件內(nèi)
for (String user : list) {
bookinf1 = user.split(",");
FileWriter fw = new FileWriter(file, true);//append傳入true表示寫入內(nèi)容時將不會覆蓋文件中之前存在的內(nèi)容，將新的內(nèi)容寫在之前內(nèi)容的后面
fw.write(bookinf1[0] + "," + bookinf1[1] +
"," + bookinf1[2] + "," + bookinf1[3] +
"," + bookinf1[4] + "," + bookinf1[5] +
"," + bookinf1[6] + "," + bookinf1[7]);//執(zhí)行重新寫入內(nèi)容的操作，將修改過的集合通過數(shù)組讀下標(biāo)后，再重新存寫入文件中
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
}
System.out.println("刪除成功！");
}
}
歸還書籍ReturnBook：
package Book;
import java.io.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;
public class ReturnBook {
Scanner scanner = new Scanner(System.in);
public void returnBook(String operator) throws IOException, ParseException {
String filePath = "書籍.txt";
ReturnBook modifyFile = new ReturnBook();
File bookFile = new File("書籍.txt");
//根據(jù)書籍名稱查詢到需要修改的書籍?dāng)?shù)據(jù)
FileInputStream intput = new FileInputStream(bookFile);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString = null;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
int flag = 0;
String[] bookinf = new String[8];
String[] bookinf1 = new String[8];
System.out.println("=======================當(dāng)前已借閱書籍有=======================");
int i = 0;
for (String user : list) {
bookinf1 = user.split(",");
if (bookinf1[6].equals(operator)) {
System.out.print(" | " + bookinf1[0] + " |");
i++;
if (i % 5 == 0) {
System.out.println("");
System.out.println("==========================================================");
}
}
}
if (i % 5 != 0) {
System.out.println("");
System.out.println("==========================================================");
}
System.out.println("請輸入要歸還的書籍名稱：");
String bookName = scanner.next();
for (String user : list) {
bookinf = user.split(",");
if (bookName.equals(bookinf[0]) && operator.equals(bookinf[6])) {
//判斷書籍是否存在，且為本人所借出
//若屬實則輸出書籍完整信息
flag = 1;
System.out.println("書名：" + bookinf[0] + ",作者：" + bookinf[1] + ",價格：" + bookinf[2] + ",類型：" + bookinf[3] +
",出版社：" + bookinf[4] + ",是否被借出：" + bookinf[5] + ",借書人：" + bookinf[6] + ",借出日期：" + bookinf[7]);
//判斷是否超時，超時需付罰金
long charge = 0;//兩個時間相差的天數(shù)
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String returnTime = sdf.format(nowDate);//獲取歸還時間
Date d1 = sdf.parse(bookinf[7]);//借出時間
Date d2 = sdf.parse(returnTime);//歸還時間
charge = (d2.getTime() - d1.getTime()) / (24 * 60 * 60 * 1000);//天
long charge1 = (d2.getTime() - d1.getTime()) / (1000);//秒
//逾期書籍將繳納罰金
if (charge1 <= 20) {
System.out.println("該書籍被您借出" + charge1 + "秒,感謝您規(guī)范用書！");
} else if (charge1 > 20) {
System.out.println("該書籍被您借出" + charge1 + "秒,您已逾期" + (charge1 - 20) + "秒,需交罰金：" + (charge1 - 20) * 5 + "元,謝謝配合！");
}
// if (charge <= 7) {
// System.out.println("該書籍被您借出" + charge + "天,感謝您規(guī)范用書！");
// } else if (charge > 7) {
// System.out.println("該書籍被您借出" + charge + "天,您已逾期" + (charge - 7) + "天,需交罰金：" + (charge - 7) * 5 + "元,謝謝配合！");
// }
break;
} else if (bookName.equals(bookinf[0]) && !operator.equals(bookinf[6]) && bookinf[5].equals("true")) {
//判斷書籍是否存在，且為本人所借出
//若存在該書籍且被借出，但不是本人所借出，只輸出該書籍基本信息
flag = 2;
System.out.println("書名：" + bookinf[0] + ",作者：" + bookinf[1] + ",價格：" + bookinf[2] +
",類型：" + bookinf[3] + ",出版社：" + bookinf[4] + ",是否被借出：" + bookinf[5]);
break;
} else if (bookName.equals(bookinf[0]) && bookinf[5].equals("false")) {
//判斷書籍是否存在，且為本人所借出
//若存在該書籍但并未被借出，只輸出該書籍基本信息
flag = 3;
System.out.println("書名：" + bookinf[0] + ",作者：" + bookinf[1] + ",價格：" + bookinf[2] +
",類型：" + bookinf[3] + ",出版社：" + bookinf[4] + ",是否被借出：" + bookinf[5]);
break;
}
}
if (flag == 0) {
System.out.println("沒有查找到該書籍，請重新確認(rèn)后再進行查找！");
} else if (flag == 2) {
System.out.println("該書不是由您所借出，請查證后再輸入歸還的書籍！");
} else if (flag == 3) {
System.out.println("該書并未被借出，請查證后再輸入歸還的書籍！");
}
//修改書籍?dāng)?shù)據(jù)后，重新寫入文件
else if (flag == 1) {
if (bookName.equals(bookinf[0]) && bookinf[5].equals("true") && operator.equals(bookinf[6])) {
modifyFile.writeFile(filePath, modifyFile.readFileContent(bookinf, filePath, "true", "false"));
// 修改文件中借閱狀態(tài)
modifyFile.writeFile(filePath, modifyFile.readFileContent(bookinf, filePath, operator, "無"));
modifyFile.writeFile(filePath, modifyFile.readFileContent(bookinf, filePath, bookinf[7], "null"));
System.out.println("歸還成功！");
//寫日志
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String returnTime = sdf.format(nowDate);
File file = new File("日志.txt");
FileWriter fw = new FileWriter(file, true);
fw.write(returnTime + " " + operator + "歸還了圖書：" + bookinf[0]);
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
return;
}
}
}
// 讀文件
public String readFileContent(String[] bookinf, String filePath, String oldString, String newString) {
Scanner sc = new Scanner(System.in);
BufferedReader br = null;
String line = null;
StringBuffer bufAll = new StringBuffer();// 保存修改過后的所有內(nèi)容
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "UTF-8"));
// System.out.println("請確認(rèn)您的用戶名：");
// String username = sc.next();
while ((line = br.readLine()) != null) {
StringBuffer buf = new StringBuffer();
// 修改內(nèi)容核心代碼
String[] bookinf2 = line.split(",");
if (bookinf2[0].equals(bookinf[0])) {//判斷條件根據(jù)自己的要求修改
buf.append(line);
int indexOf = line.indexOf(oldString);
buf.replace(indexOf, indexOf + oldString.length(), newString);// 修改內(nèi)容
buf.append(System.getProperty("line.separator"));// 添加換行
bufAll.append(buf);
} else {
buf.append(line);
buf.append(System.getProperty("line.separator"));
bufAll.append(buf);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (Exception e) {
br = null;
}
}
}
return bufAll.toString();
}
// 寫文件
public boolean writeFile(String filePath, String content) {
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath), "UTF-8"));
bw.write(content);
bw.flush();
} catch (Exception e) {
e.printStackTrace();
return false;
} finally {
if (bw != null) {
try {
bw.close();
} catch (IOException e) {
bw = null;
}
}
}
return true;
}
}
查詢書籍FindBook：
package Book;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Scanner;
public class FindBook {
Scanner scanner = new Scanner(System.in);
File bookFile = new File("書籍.txt");
public void findBook(String operator) throws IOException {
FileInputStream intput = new FileInputStream(bookFile);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString = null;
// int line = 1;
List<String> list = new ArrayList<>();
// System.out.println("書籍 | 作者 | 價格 | 類型 | 出版社 | 是否被借出");
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
// System.out.println(tempString);
// line++;
}
boolean flag = false;
String[] bookinf = new String[8];
System.out.println("=========================當(dāng)前書籍有=========================");
int i = 0;
for (String user : list) {
bookinf = user.split(",");
System.out.print(" | " + bookinf[0] + " 是否被借出：" + bookinf[5] + " |");
i++;
if (i % 2 == 0) {
System.out.println("");
System.out.println("==========================================================");
}
}
if (i % 2 != 0) {
System.out.println("");
System.out.println("==========================================================");
}
System.out.println("請輸入要查看詳細信息的書籍名稱：");
String bookName = scanner.next();
for (String user : list) {
bookinf = user.split(",");
if (bookName.equals(bookinf[0])) { //判斷書籍是否存在
flag = true;
System.out.println("書名：" + bookinf[0] + ",作者：" + bookinf[1] + ",價格：" + bookinf[2] +
",類型：" + bookinf[3] + ",出版社：" + bookinf[4] + ",是否被借出：" + bookinf[5]);
//寫日志
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String findTime = sdf.format(nowDate);
File file = new File("日志.txt");
FileWriter fw = new FileWriter(file, true);
fw.write(findTime + " " + operator + "查詢了圖書：" + bookinf[0]);
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
break;
}
}
if (flag == false) {
System.out.println("沒有查找到該書籍，請重新確認(rèn)后再進行查找！");
}
}
public void adminFindBook() throws IOException {
FileInputStream intput = new FileInputStream(bookFile);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString = null;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
// System.out.println(tempString);
}
String[] bookinf = new String[8];
System.out.println("=========================當(dāng)前書籍有=========================");
int i = 0;
for (String user : list) {
bookinf = user.split(",");
System.out.print(" | " + bookinf[0] + " |");
i++;
if (i % 5 == 0) {
System.out.println("");
System.out.println("==========================================================");
}
}
System.out.println("");
System.out.println("==========================================================");
System.out.println("請輸入要查看詳細信息的書籍名稱：");
String bookName = scanner.next();
boolean flag = false;
for (String user : list) {
bookinf = user.split(",");
if (bookName.equals(bookinf[0])) { //判斷書籍是否存在
flag = true;
System.out.println("書名：" + bookinf[0] + ",作者：" + bookinf[1] + ",價格：" + bookinf[2] + ",類型：" + bookinf[3] +
",出版社：" + bookinf[4] + ",是否被借出：" + bookinf[5] + ",借書人：" + bookinf[6] + ",借出日期：" + bookinf[7]);
break;
}
}
if (flag == false) {
System.out.println("沒有查找到該書籍，請重新確認(rèn)后再進行查找！");
}
}
}
用戶界面User：
package User;
import Book.BorrowBook;
import Book.FindBook;
import Book.ReturnBook;
import java.io.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
public class User extends Person {
//用戶屬性
private long Uphone;
private String Upassword;
public User() {
}
public User(String name, String sex, int age, long Uphone, String Upassword) {
super(name, sex, age);
this.Uphone = Uphone;
this.Upassword = Upassword;
}
public long getUphone() {
return Uphone;
}
public void setUphone(int uphone) {
Uphone = uphone;
}
public String getUpassword() {
return Upassword;
}
public void setUpassword(String upassword) {
Upassword = upassword;
}
public String toString() {
return name + "," + Upassword + "," + sex + "," + age + "," + Uphone;
}
public void operation(String[] userinf, String operator) throws IOException, ParseException {
File bookFile = new File("書籍.txt");
FindBook fb = new FindBook();
while (true) {
System.out.println("===============普通用戶操作界面===============");
System.out.println("1.查詢書籍 2.借閱書籍 3.歸還書籍 4.修改密碼 5.返回");
Scanner sc = new Scanner(System.in);
int j = sc.nextInt();
if (j < 1 || j > 5) {
System.out.println("到底能不能行？能不能看明白了再輸！");
} else if (j == 5) {
return;
} else if (j == 1) {//查詢書籍
fb.findBook(operator);
} else if (j == 2) {//借閱書籍
BorrowBook bb = new BorrowBook();
bb.borrowBook(operator);
} else if (j == 3) {//歸還書籍
ReturnBook gbb = new ReturnBook();
gbb.returnBook(operator);
} else if (j == 4) {//修改密碼
String filePath = "用戶信息.txt";
User modifyFile = new User();
System.out.println("請輸入原密碼：");
String oldString = sc.next();
//如果輸入的原密碼不正確，無法進行修改，如果正確，才能進行修改
if (oldString.equals(userinf[1])) {
System.out.println("請輸入新密碼：");
String newString = sc.next();
boolean result = modifyFile.writeFile(filePath, modifyFile.readFileContent(userinf, filePath, oldString, newString));// 修改文件中密碼
// 如果修改結(jié)果為true，進行修改成功提示，否則提示修改失敗
if (result == true) {
System.out.println("修改成功，請重新登錄！");
//寫日志
Date nowDate = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String returnTime = sdf.format(nowDate);
File file = new File("日志.txt");
FileWriter fw = new FileWriter(file, true);
fw.write(returnTime + " " + operator + "修改了密碼");
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
return;
} else {
System.out.println("修改錯誤，請檢查后重新修改！");
}
} else {
System.out.println("輸入錯誤，請檢查后重新進行修改！");
}
}
}
}
// 讀文件
public String readFileContent(String[] userinf, String filePath, String oldString, String newString) {
Scanner sc = new Scanner(System.in);
BufferedReader br = null;
String line = null;
StringBuffer bufAll = new StringBuffer();// 保存修改過后的所有內(nèi)容
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "UTF-8"));
while ((line = br.readLine()) != null) {
StringBuffer buf = new StringBuffer();
// 修改內(nèi)容核心代碼
String[] userinf2 = line.split(",");
if (userinf2[0].equals(userinf[0])) {//判斷條件根據(jù)自己的要求修改
buf.append(line);
int indexOf = line.indexOf(oldString);
buf.replace(indexOf, indexOf + oldString.length(), newString);// 修改內(nèi)容
buf.append(System.getProperty("line.separator"));// 添加換行
bufAll.append(buf);
} else {
buf.append(line);
buf.append(System.getProperty("line.separator"));
bufAll.append(buf);
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (Exception e) {
br = null;
}
}
}
return bufAll.toString();
}
// 寫文件
public boolean writeFile(String filePath, String content) {
BufferedWriter bw = null;
try {
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath), "UTF-8"));
bw.write(content);
bw.flush();
} catch (Exception e) {
e.printStackTrace();
return false;
} finally {
if (bw != null) {
try {
bw.close();
} catch (IOException e) {
bw = null;
}
}
}
return true;
}
}
管理員操作界面Admin：
package User;
import Book.AddBook;
import Book.DeleteBook;
import Book.FindBook;
import java.io.*;
import java.util.Scanner;
public class Admin {
public Admin() {
}
public void admin() throws IOException {
File adminBook = new File("書籍.txt");
File adminUser = new File("用戶信息.txt");
FindBook fb = new FindBook();
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("===============圖書管理員操作界面===============");
System.out.println("1.查詢書籍 2.添加書籍 3.刪除書籍 4.增/刪用戶 5.查看日志 6.返回");
int choice = scanner.nextInt();
if (choice < 1 || choice > 6) {
System.out.println("到底能不能行？能不能看明白了再輸！");
} else if (choice == 6) {
return;
} else if (choice == 1) {
//查詢書籍
fb.adminFindBook();
} else if (choice == 2) {
//添加書籍
AddBook ab = new AddBook();
ab.addBook();
} else if (choice == 3) {
//刪除書籍
DeleteBook db = new DeleteBook();
db.deleteBook();
} else if (choice == 4) {
//增刪用戶
System.out.println("==========增/刪用戶==========");
System.out.println("1.增加用戶 2.刪除用戶 3.返回");
int decision = scanner.nextInt();
if (decision == 3) {
//返回
break;
} else if (decision == 1) {
//增加用戶
AddUser au = new AddUser();
au.addUser();
} else if (decision == 2) {
//刪除用戶
DeleteUser du = new DeleteUser();
du.deleteUser();
}
} else if (choice == 5) {
//查看日志
File file = new File("日志.txt");
FileInputStream intput = new FileInputStream(file);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString = null;
System.out.println("-----------------用戶操作日志-----------------");
while ((tempString = reader.readLine()) != null) {
System.out.println(tempString);
System.out.println("--------------------------------------------");
}
while (true) {
System.out.println("查看完畢，是否清空日志？");
System.out.println("1.是 2.否");
int choice1 = scanner.nextInt();
if (choice1 == 1) {
FileWriter fw = new FileWriter(file, false);
fw.write("");
fw.close();
break;
} else if (choice1 == 2) {
break;
} else if (choice1 != 1 && choice1 != 2) {
System.out.println("請認(rèn)真核對后再輸入！");
}
}
}
}
}
}
增加用戶AddUser：
package User;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
public class AddUser {
public void addUser() throws IOException {
Scanner sc = new Scanner(System.in);
File file = new File("用戶信息.txt");
System.out.println("請輸入添加的用戶名：");
String addName = sc.next();
//查找是否有同名用戶
FileInputStream intput = new FileInputStream(file);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
String tempString;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
String[] userinf = new String[5];
boolean flag = false;
for (String user : list) {
userinf = user.split(",");
if (addName.equals(userinf[0])) { //判斷用戶名是否存在
flag = true;
System.out.println("該用戶名已存在，請讓其重新擬取名稱");
break;
}
}
if (flag == false) {
System.out.println("請輸入密碼：");
String password = sc.next();
String sex;
while (true) {
System.out.println("請輸入用戶的性別：");
sex = sc.next();
if (sex.equals("男") || sex.equals("女")) {
break;
} else {
System.out.println("請輸入正確的性別！");
}
}
System.out.println("請輸入用戶的年齡：");
int age = sc.nextInt();
if (age < 10) {
System.out.println("該用戶的年齡太小啦！請讓家長使用賬號幫他(她)借閱書籍！");
return;
}
long phone;
while (true) {
System.out.println("請輸入該用戶的電話號碼：");
phone = sc.nextInt();
if (phone < 0) {
System.out.println("請輸入正確的電話號碼！");
} else {
break;
}
}
User u = new User(addName, sex, age, phone, password);
file.createNewFile();
FileWriter fw = new FileWriter(file, true);
fw.write(u.toString());
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
System.out.println("成功添加用戶：" + addName);
return;
}
}
}
刪除用戶DeleteUser：
package User;
import java.io.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
public class DeleteUser {
private String userDelete;
String[] userinf = new String[5];
String[] userinf1 = new String[5];
String[] userinf2 = new String[5];
public void deleteUser() throws IOException {
File file = new File("用戶信息.txt");
FileInputStream intput = new FileInputStream(file);
BufferedReader reader = new BufferedReader(new InputStreamReader(intput));
Scanner scanner = new Scanner(System.in);
String tempString;
List<String> list = new ArrayList<>();
while ((tempString = reader.readLine()) != null) {
list.add(tempString);
}
System.out.println("==========當(dāng)前用戶有==========");
for (String user : list) {
userinf = user.split(",");
System.out.print(userinf[0] + " ");
}
System.out.println("");
System.out.println("請輸入要刪除信息的用戶名：");
userDelete = scanner.next();
//查詢該用戶是否有未歸還的書籍，如果存在未歸還的書籍，將不能刪除該用戶的信息
boolean have = false;
String[] bookinf = new String[8];
File bookFile = new File("書籍.txt");
FileInputStream inputStream = new FileInputStream(bookFile);
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String bookString;
List<String> bookList = new ArrayList<>();
while ((bookString = bufferedReader.readLine()) != null) {
bookList.add(bookString);
}
for (String borrowUser : bookList) {
bookinf = borrowUser.split(",");
if (userDelete.equals(bookinf[6])) {
have = true;
System.out.println("該用戶還有書籍尚未歸還，請在其歸還書籍后再進行刪除！");
return;
}
}
if (have == false) {
boolean flag = false;
for (String user : list) {
userinf1 = user.split(",");
if (userDelete.equals(userinf1[0])) { //判斷用戶名是否存在
flag = true;
list.remove(user);
FileWriter fd = new FileWriter(file, false);
fd.write("");
fd.close();
break;
}
}
if (flag == true) {
for (String user : list) {
userinf2 = user.split(",");
FileWriter fw = new FileWriter(file, true);
fw.write(userinf2[0] + "," + userinf2[1] + "," + userinf2[2] + "," + userinf2[3] + "," + userinf2[4]);
fw.write(System.getProperty("line.separator"));//在段落后添加一個換行符
fw.close();
// return;
}
System.out.println("刪除成功！");
} else {
System.out.println("無法找到該用戶，請重新確認(rèn)后再進行操作！");
return;
}
}
}
public static void main(String[] args) throws IOException {
DeleteUser du = new DeleteUser();
du.deleteUser();
}
}
最后是運行的主函數(shù)：
public static void main(String[] args) throws IOException, ParseException {
Library library = new Library();
library.Interface();
}
整個項目完成之后的包和類如下所示：
書籍和用戶信息中之前添加過的信息如下：
書籍信息：
用戶信息：
五、總結(jié)
該項目是我學(xué)Java以來自己制作的功能最為復(fù)雜，設(shè)計內(nèi)容最豐富的項目，同時也是耗費我時間最久的項目，項目中還有很多地方的代碼是可以繼續(xù)優(yōu)化的，而且還有很多可以增加用戶體驗的功能是可以再添加的。
整個項目的制作過程也是我查缺補漏的一個過程，將我之前學(xué)習(xí)的比較薄弱的部分給進行了增強，同時也將一些之前學(xué)的扎實的部分進行了加固。
到此這篇關(guān)于Java實戰(zhàn)之基于I/O流設(shè)計的圖書館管理系統(tǒng)的文章就介紹到這了,更多相關(guān)java圖書館管理系統(tǒng)內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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