From a960428156d23ce6a2a22439b114ebf30282c749 Mon Sep 17 00:00:00 2001 From: dev_xulongjin Date: Mon, 14 Apr 2025 10:19:58 +0800 Subject: [PATCH] =?UTF-8?q?feat(java-lesson):=20java=E5=AE=9E=E9=AA=8C3-?= =?UTF-8?q?=E5=AE=9E=E7=8E=B0=E5=9B=BE=E4=B9=A6=E7=A7=9F=E9=98=85=E7=AE=A1?= =?UTF-8?q?=E7=90=86=E7=B3=BB=E7=BB=9F?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - 新增 Book、RentBook、VIPReader 类- 实现 RentBookManage 和 RentBookManagenew 类的图书管理功能 - 添加 PayException 异常类和 DecF 工具类 - 编写测试类 Test、TestRentBookManage 和 TestRentBookManageNew --- java-lesson/pom.xml | 17 ++ .../cn/vscoder/experiment_3/book/Book.java | 52 ++++++ .../vscoder/experiment_3/book/RentBook.java | 35 ++++ .../cn/vscoder/experiment_3/common/DecF.java | 23 +++ .../experiment_3/common/PayException.java | 14 ++ .../experiment_3/common/Promotion.java | 7 + .../vscoder/experiment_3/reader/Reader.java | 69 +++++++ .../experiment_3/reader/VIPReader.java | 94 ++++++++++ .../experiment_3/rent/RentBookManage.java | 163 +++++++++++++++++ .../experiment_3/rent/RentBookManagenew.java | 172 ++++++++++++++++++ .../vscoder/experiment_3/rent/RentRecord.java | 118 ++++++++++++ .../cn/vscoder/experiment_3/test/Test.java | 27 +++ .../experiment_3/test/TestRentBookManage.java | 38 ++++ .../test/TestRentBookManageNew.java | 59 ++++++ 14 files changed, 888 insertions(+) create mode 100644 java-lesson/pom.xml create mode 100755 java-lesson/src/main/java/cn/vscoder/experiment_3/book/Book.java create mode 100755 java-lesson/src/main/java/cn/vscoder/experiment_3/book/RentBook.java create mode 100644 java-lesson/src/main/java/cn/vscoder/experiment_3/common/DecF.java create mode 100644 java-lesson/src/main/java/cn/vscoder/experiment_3/common/PayException.java create mode 100644 java-lesson/src/main/java/cn/vscoder/experiment_3/common/Promotion.java create mode 100755 java-lesson/src/main/java/cn/vscoder/experiment_3/reader/Reader.java create mode 100755 java-lesson/src/main/java/cn/vscoder/experiment_3/reader/VIPReader.java create mode 100755 java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManage.java create mode 100644 java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManagenew.java create mode 100644 java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentRecord.java create mode 100755 java-lesson/src/main/java/cn/vscoder/experiment_3/test/Test.java create mode 100755 java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManage.java create mode 100644 java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManageNew.java diff --git a/java-lesson/pom.xml b/java-lesson/pom.xml new file mode 100644 index 0000000..7449bf3 --- /dev/null +++ b/java-lesson/pom.xml @@ -0,0 +1,17 @@ + + + 4.0.0 + + cn.vscoder + java-lesson + 1.0-SNAPSHOT + + + 17 + 17 + UTF-8 + + + \ No newline at end of file diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/book/Book.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/book/Book.java new file mode 100755 index 0000000..bb76b5f --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/book/Book.java @@ -0,0 +1,52 @@ +package cn.vscoder.experiment_3.book; + +public class Book { + /* 定义类的5个成员变量：书号、书名、作者、出版社、定价*/ + public String ISBN; //存储国际标准书号 + public String bookName; //存储书名 + public String author; //存储作者 + public String publisher; //存储出版社 + private double price; //存储书的定价 + + public Book(String ISBN, String bookName, String author, String publisher, double price) { + this.ISBN = ISBN; + this.bookName = bookName; + this.author = author; + this.publisher = publisher; + this.price = price; + } + + public String getISBN() { + return ISBN; + } + + public String getBookName() { + return bookName; + } + + public String getAuthor() { + return author; + } + + public String getPublisher() { + return publisher; + } + + public double getPrice() { + return price; + } + + public void setPrice(double price) { + this.price = price; + } + + @Override + public String toString() { + return "图书信息：" + + "ISBN='" + ISBN + '\'' + + ", 书名='" + bookName + '\'' + + ", 作者='" + author + '\'' + + ", 出版社='" + publisher + '\'' + + ", 定价=" + price; + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/book/RentBook.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/book/RentBook.java new file mode 100755 index 0000000..8bd4c6e --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/book/RentBook.java @@ -0,0 +1,35 @@ +package cn.vscoder.experiment_3.book; + +public class RentBook extends Book { + private String bookNo;//入库编号 + private boolean state;//是否可借 true:可借 + + public RentBook(String ISBN, String bookName, String author, String publisher, double price, String bookNo) { + super(ISBN, bookName, author, publisher, price); + this.bookNo = bookNo; + state = true;//默认可借 + } + + public String getBookNo() { + return bookNo; + } + + public void setBookNo(String bookNo) { + this.bookNo = bookNo; + } + + public boolean isState() { + return state; + } + + public void setState(boolean state) { + this.state = state; + } + + @Override + public String toString() { + return super.toString() + + ",入库编号='" + bookNo + '\'' + + ", 是否可借=" + state; + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/common/DecF.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/common/DecF.java new file mode 100644 index 0000000..b1ed3ed --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/common/DecF.java @@ -0,0 +1,23 @@ +package cn.vscoder.experiment_3.common; + +/* 自定义一个对double型数据的小数点只显示2位的专用类 */ + +import java.text.NumberFormat; +import java.math.BigDecimal; + +public class DecF +{ + public static String DecS(Double x) //方法：返回保留两位小数的字符串 + { + NumberFormat df = NumberFormat.getNumberInstance(); + df.setMaximumFractionDigits(2); + return df.format(x); + } + + public static double DecD(Double x) //方法：返回保留两位小数的Double值 + { + x = new BigDecimal(x) + .setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue(); + return x; + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/common/PayException.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/common/PayException.java new file mode 100644 index 0000000..8b87236 --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/common/PayException.java @@ -0,0 +1,14 @@ +package cn.vscoder.experiment_3.common; + +public class PayException extends Exception { + String s; + + public PayException() { + s = "余额不足以支付租金。"; + } + + //输出异常信息 + public String toString() { + return s; + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/common/Promotion.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/common/Promotion.java new file mode 100644 index 0000000..3feafef --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/common/Promotion.java @@ -0,0 +1,7 @@ +package cn.vscoder.experiment_3.common; + +public interface Promotion { + static final int promtpoints = 1000; + + abstract void promotion(String level); +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/reader/Reader.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/reader/Reader.java new file mode 100755 index 0000000..ff61501 --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/reader/Reader.java @@ -0,0 +1,69 @@ +package cn.vscoder.experiment_3.reader; + +public class Reader { + public int readerID; + protected String readerName; + protected String readerPwd; + protected double balance; + + private static int nextReaderID; + + static{ + nextReaderID=10001; + } + + public Reader() { + readerID=nextReaderID++; + readerName=""; + readerPwd="666666"; + balance=0; + } + + public Reader(String readerName) { + this(); + this.readerName = readerName; + } + + public int getReaderID() { + return readerID; + } + + public String getReaderName() { + return readerName; + } + + public String getReaderPwd() { + return readerPwd; + } + + public double getBalance() { + return balance; + } + //修改密码，密码必须为6位 + public void changePwd(String oldPwd,String newPwd){ + if (oldPwd.equals(this.readerPwd)){ + if (newPwd.length()==6){ + this.readerPwd=newPwd; + System.out.println("密码修改成功！"); + + }else{ + System.out.println("密码必须为6位！"); + } + } + } + //充值功能。充值不能小于0 + public void setBalance(double balance) {//充值 + if (balance<0){ + System.out.println("充值金额不能小于0！"); + }else { + this.balance += balance;} + } + @Override + public String toString() { + return "读者信息：" + + "readerID=" + readerID + + ", 读者姓名='" + readerName + '\'' + + ", 密码='" + readerPwd + '\'' + + ", 余额=" + balance ; + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/reader/VIPReader.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/reader/VIPReader.java new file mode 100755 index 0000000..621d51f --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/reader/VIPReader.java @@ -0,0 +1,94 @@ +package cn.vscoder.experiment_3.reader; + +import cn.vscoder.experiment_3.common.PayException; +import cn.vscoder.experiment_3.common.Promotion; + +public class VIPReader extends Reader implements Promotion { + private String readerGrade;//读者级别 + private double percent;//折扣率 + private int bonusPoints;//积分 + + public VIPReader(String readerName, String readerGrade) { + super(readerName); + this.readerGrade = readerGrade; + setPercent();//设置折扣率 + bonusPoints = 0; + } + + public String getReaderGrade() { + return readerGrade; + } + + public void setReaderGrade(String readerGrade) { + this.readerGrade = readerGrade; + } + + public double getPercent() { + return percent; + } + + public void setPercent() { + if (readerGrade.equals("VIP")) { + this.percent = 0.8;//8折 + + } else if (readerGrade.equals("普通会员")) { + this.percent = 0.9;//9折 + } else {//非会员 + this.percent = 1;//不打折 + } + } + + public boolean payRent(double money) throws PayException {//支付 +// if (this.getBalance() >= money) { +// this.balance = this.balance - money; +// return true; +// } else { +// System.out.println("余额不足，请及时充值！"); +// return false; +// } + if (this.balance < money) { + throw new PayException(); //当余额不足支付租金时抛出支付异常 + } else { + balance = balance - money; + return true; + } + } + + public int getBonusPoints() { + return bonusPoints; + } + + public void setBonusPoints(int bonusPoints) {//积分 + this.bonusPoints += bonusPoints; + } + + @Override + public String toString() { + return super.toString() + + ",读者级别='" + readerGrade + '\'' + + ", 折扣率=" + percent + + ", 积分=" + bonusPoints; + } + + @Override + public void promotion(String level) //实现接口中的抽象方法 + { + if (this.getBonusPoints() >= promtpoints) //如果会员积分超过晋级标准 + { + switch (level) { + case "VIP": + this.balance += 10; + break; //对VIP会员，1000积分返利10元 + case "普通会员": + this.readerGrade = "VIP"; + break; //对普通会员，达到1000积分则晋级为VIP会员 + case "非会员": + this.readerGrade = "普通会员"; + break;//非会员达到1000积分则晋级为普通会员 + } + bonusPoints -= promtpoints; //晋级后，会员积分-晋级标准分 + } else + readerGrade = level; //积分不达标，身份不变 + setPercent(); //调用设置折扣的方法 + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManage.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManage.java new file mode 100755 index 0000000..e297858 --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManage.java @@ -0,0 +1,163 @@ +package cn.vscoder.experiment_3.rent; + +import cn.vscoder.experiment_3.book.RentBook; +import cn.vscoder.experiment_3.common.PayException; +import cn.vscoder.experiment_3.reader.VIPReader; + +import java.util.ArrayList; +import java.util.LinkedList; + +public class RentBookManage { + //租阅期限deadTime + int deadTime = 30; + double normalRent = 0.5;//正常租阅费用 + double delayRent = 1.0;//超期租阅费用 + int rentDays; + double rent;//租阅费用 + + public ArrayList readerlist;//读者列表 + LinkedList booklist;//图书列表 + ArrayList rentlist;//租阅记录 + VIPReader renter;//借阅者 + RentBook rentbook; + + public RentBookManage() {//创建空的列表 + booklist = new LinkedList<>(); + readerlist = new ArrayList<>(); + rentlist = new ArrayList<>(); + } + + //图书管理相关功能、添加图书、删除图书、打印图书列表、修改图书价格、查找图书 + public void addBook(RentBook rentBook) { + booklist.add(rentBook); + } + + public void addBook(String isbn, String bookname, String author, String publisher, double price, String inNo) { + booklist.add(new RentBook(isbn, bookname, author, publisher, price, inNo)); + } + + public void addBook(int i, RentBook rentBook) {//指定位置，添加图书 + booklist.add(i - 1, rentBook); + } + + public RentBook searchBook(String bookName) {//根据书名查找图书 + for (int j = 0; j < booklist.size(); j++) { + if (booklist.get(j).getBookName().equals(bookName)) { + System.out.println(booklist.get(j)); + return booklist.get(j); + } + } + System.out.println("您要查找的图书：" + bookName + "不存在！"); + return null; + + } + + public void editBook(String bookName, double newprice) { + for (int j = 0; j < booklist.size(); j++) { + if (booklist.get(j).getBookName().equals(bookName)) { + booklist.get(j).setPrice(newprice); + System.out.println(booklist.get(j)); + return; + } + } + System.out.println("您要查找的图书：" + bookName + "不存在！"); + + } + + public void deleteBook(String bookName) { + for (int j = 0; j < booklist.size(); j++) { + if (booklist.get(j).getBookName().equals(bookName)) { + booklist.remove(j); + System.out.println("删除" + bookName + "成功！"); + return; + } + } + System.out.println("您要删除的图书：" + bookName + "不存在！"); + + } + + public void displayAllBooks() { + for (RentBook rentBook : booklist) { + System.out.println(rentBook); + } + } + + //读者，添加读者、显示所有读者 + public void addReader(String name, String grade) { + readerlist.add(new VIPReader(name, grade)); + } + + public void addReader(VIPReader vipReader) { + readerlist.add(vipReader); + } + + public void displayAllReaders() { + for (VIPReader vipReader : readerlist) { + System.out.println(vipReader); + } + } + + //计算租金 + public double setRent() { + if (rentDays <= deadTime) { + rent = rentDays * normalRent * renter.getPercent(); + } else { + rent = ((rentDays - deadTime) * delayRent + normalRent * deadTime) * renter.getPercent(); + } + return rent; + } + + //支付租金 + public boolean renting() throws PayException { + setRent(); + if (renter.payRent(rent)) { + System.out.println(renter.getReaderName() + "支付租金：" + rent + "成功！"); + return true; + } else { + System.out.println(renter.getReaderName() + "的账号余额为：" + renter.getBalance() + "不足以支付租金" + rent); + return false; + } + } + + //租阅功能 + public boolean rentBook(VIPReader vr, RentBook bk, int days) throws PayException { + rentbook = bk; + renter = vr; + rentDays = days; + if (renting()) { + renter.setBonusPoints(rentDays);//给借阅者积分 + rentlist.add("读者：" + renter.getReaderName() + "\t读者等级：" + renter.getReaderGrade() + "\t借阅图书为：" + bk.getBookName() + "\t租书天数：" + rentDays + "\t租金:" + rent + "读者当前积分" + renter.getBonusPoints() + "\t读者账户余额" + renter.getBalance()); + return true; + } else { + System.out.println("支付失败"); + return false; + } + } + + //展示借阅记录 + public void printRentlist() { + for (String str : rentlist) { + System.out.println(str); + } + } + + public double getNormalRent() { + return normalRent; + } + + public void setNormalRent(double normalRent) { + this.normalRent = normalRent; + } + + public double getDelayRent() { + return delayRent; + } + + public void setDelayRent(double delayRent) { + this.delayRent = delayRent; + } + + public int getDeadTime() { + return deadTime; + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManagenew.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManagenew.java new file mode 100644 index 0000000..9290280 --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentBookManagenew.java @@ -0,0 +1,172 @@ +package cn.vscoder.experiment_3.rent; + +/* 第3-6题是RentBookManage修改后的图书租赁信息管理类 */ + + +import cn.vscoder.experiment_3.book.RentBook; // 引入book包中的RentBook类 +import cn.vscoder.experiment_3.reader.VIPReader; // 引入reader包中的VIPReader类 +import cn.vscoder.experiment_3.common.PayException; // 引入common包中的PayException异常类 +import java.util.*; // 导入常用集合类，如LinkedList和ArrayList + +public class RentBookManagenew { // 类定义，使用public修饰 + + /* 1. 定义所需的成员变量 */ + static final int deadTime = 10; // 静态常量：规定租期上限天数，final修饰不可修改 + double normalRent = 0.1; // 实例变量：正常租金费率 + double delayRent = 0.4; // 实例变量：逾期租金费率 + + VIPReader renter; // 当前还书的会员读者对象 + RentRecord rentrecord; // 当前操作的租赁记录对象 + + public LinkedList booklist; // 图书列表，保存所有可租图书 + public ArrayList readerlist; // 读者列表，保存所有会员读者 + public ArrayList rentlist; // 租借记录列表 + public ArrayList returnlist; // 还书记录信息列表 + + int j; // 循环索引变量 + + /* 2. 无参构造函数 */ + public RentBookManagenew() { + booklist = new LinkedList<>(); + readerlist = new ArrayList<>(); + rentlist = new ArrayList<>(); + returnlist = new ArrayList<>(); + } + + /* 3. 相关getter/setter方法 */ + + public static double getDeadTime() { + return deadTime; + } + + public void setNormalRent(double newNR) { + normalRent = newNR; + } + + public double getNormalRent() { + return normalRent; + } + + public void setDelayRent(double newNR) { + delayRent = newNR; + } + + public double getDelayRent() { + return delayRent; + } + + /* 4. 图书信息操作相关方法 */ + + public void addBook(String isbn, String bname, String bauthor, String bpublisher, double bprice, String no) { + booklist.add(new RentBook(isbn, bname, bauthor, bpublisher, bprice, no)); + } + + public void addBook(int i, String isbn, String bname, String bauthor, String bpublisher, double bprice, String no) { + booklist.add(i, new RentBook(isbn, bname, bauthor, bpublisher, bprice, no)); + } + + public void searchBook(String bookNo) { + boolean flag = false; + for (j = 0; j < booklist.size(); j++) { + if (booklist.get(j).getBookNo().equals(bookNo)) { + System.out.println(booklist.get(j)); + flag = true; + } + } + if (!flag) + System.out.println("未找到指定图书。"); + } + + public void editBook(String isbn, double bprice) { + for (j = 0; j < booklist.size(); j++) { + if (booklist.get(j).getISBN().equals(isbn)) { + booklist.get(j).setPrice(bprice); + System.out.println(booklist.get(j)); + } + } + } + + public void deleteBook(String isbn) { + for (j = 0; j < booklist.size(); j++) { + if (booklist.get(j).getISBN().equals(isbn)) { + booklist.remove(j); + System.out.println("成功删除图书。"); + } + } + } + + public void displayBook() { + for (RentBook b : booklist) + System.out.println(b); + } + + /* 5. 读者信息添加与展示 */ + + public void addReader(String name, String grade) { + readerlist.add(new VIPReader(name, grade)); + } + + public void displayReader() { + for (VIPReader r : readerlist) + System.out.println(r); + } + + /* 6. 与租赁业务相关的方法 */ + + public void addRentRecord(RentBook bk, VIPReader rd, String rdate) { + if (rentlist.size() == 0) { + rentlist.add(new RentRecord(bk, rd, rdate)); + } else { + boolean flag = true; + for (j = 0; j < rentlist.size(); j++) { + if (rentlist.get(j).getBookNo().equals(bk.getBookNo())) { + System.out.println(rentlist.get(j).getBookNo() + " 已被租借"); + flag = false; + } + } + if (flag) { + rentlist.add(new RentRecord(bk, rd, rdate)); + } + } + } + + public void returnBook(RentBook bk, VIPReader rd, String redate) { + for (j = 0; j < rentlist.size(); j++) { + if (rentlist.get(j).getBookNo().equals(bk.getBookNo())) { + renter = rd; + rentlist.get(j).setReturnDate(redate); + rentlist.get(j).setRent(deadTime, normalRent, delayRent, renter.getPercent()); + rentlist.get(j).setBonusPoints(); + renter.setBonusPoints(rentlist.get(j).getBonusPoints()); + renter.promotion(renter.getReaderGrade()); + + if (renting()) { + returnlist.add("\n" + renter.getReaderName() + " | " + renter.getReaderGrade() + " 会员账户余额=" + renter.getBalance() + + " 当前积分=" + renter.getBonusPoints() + "\n借阅图书信息: " + rentlist.get(j).toString()); + rentlist.remove(j); + } + } + } + } + + public boolean renting() { + try { + renter.payRent(rentlist.get(j).getRent()); + System.out.println(renter.getReaderName() + " 支付租金：" + rentlist.get(j).getRent() + " 成功！"); + return true; + } catch (PayException pe) { + System.out.println(renter.getReaderName() + pe); + return false; + } + } + + public void displayRentInfo() { + for (RentRecord br : rentlist) + System.out.println(br); + } + + public void displayReturnInfo() { + for (String bre : returnlist) + System.out.println(bre); + } +} \ No newline at end of file diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentRecord.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentRecord.java new file mode 100644 index 0000000..2fbc81d --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/rent/RentRecord.java @@ -0,0 +1,118 @@ +package cn.vscoder.experiment_3.rent; + +/*例3-5 用来处理图书租阅记录的实体类，设计了6个属性、2个构造方法、9个成员方法、1个内部类 */ +import java.util.*; //加载工具类包的类，时间计算需要用到Calendar、Date +import cn.vscoder.experiment_3.book.RentBook; +import cn.vscoder.experiment_3.reader.VIPReader; +import cn.vscoder.experiment_3.common.DecF; //自定义通用类，对double型值只保留2位小数 + +public class RentRecord // 租书记录类 +{ + private String bookNo; //被租图书入库编号 + private int readerID; //读者编号 + private String rentDate=""; //租书日期，格式：20201015 + private String returnDate=""; //还书日期 + private double rents; //租金 + private int bonusPoints; //积分 + + public RentRecord(RentBook rb, VIPReader reader, String rentd) + { + this.bookNo = rb.getBookNo(); + this.readerID = reader.getReaderID(); + rentDate = rentd; + returnDate = ""; + rents = 0; + bonusPoints = 0; + } + + public RentRecord(RentBook rb, VIPReader reader, String rentd, String returnd) //添加public修饰符 + { + this(rb, reader, rentd); + returnDate = returnd; + bonusPoints = getBonusPoints(); + } + + public int getReaderID() //获取读者编号 + { + return readerID; + } + + public String getBookNo() //获取入库号 + { + return bookNo; + } + + public void setRentDate(String rentdate) //设置租书日期 + { + this.rentDate = rentdate; + } + + public void setReturnDate(String returndate) //设置还书日期 + { + this.returnDate = returndate; + } + + public long sumRentdays() //计算租阅总天数的成员方法 + { + SumDays sd = new SumDays(); //创建内部类的对象 + return sd.setRentDays(rentDate, returnDate); //调用内部类的方法计算租阅总天数 + } + + public void setRent(int deadTime, double nRent, double dRent, double pencent) //计算租金 + { + int rentDays = (int)sumRentdays(); + if(rentDays <= deadTime) + rents = DecF.DecD(rentDays * nRent * pencent); //在规定期限内按正常租阅费率计算租金 + else + rents = DecF.DecD(((rentDays - deadTime) * dRent + deadTime * nRent) * pencent); //超期租金 + } + + public double getRent() //获取租金 + { + return rents; + } + + public void setBonusPoints() //计算积分 + { + bonusPoints = bonusPoints + (int)sumRentdays(); //按照租阅天数累积会员积分，每天1分 + } + + public int getBonusPoints() //获取积分 + { + return bonusPoints; + } + + public String toString() //重写toString()方法 + { + if(returnDate.length() == 0) //借书时 + return " 入库号：" + getBookNo() + " 租借者：" + getReaderID() + " 租书日期：" + rentDate; + else //还书时 + return " 入库号：" + getBookNo() + " 租借者：" + getReaderID() + " 租书日期：" + rentDate + + " 还书日期：" + returnDate + " 租阅天数：" + sumRentdays() + " 积分：" + getBonusPoints() + + " 租金：" + getRent(); + } + + /* 计算租阅总天数的内部类 */ + private class SumDays + { + Calendar c = Calendar.getInstance(); + + public long setRentDays(String rentD, String sendD) //根据租书日期和还书日期计算租阅总天数 + { + int y1 = Integer.parseInt(rentD.substring(0, 4)); //提取租书日期的年份 + int m1 = Integer.parseInt(rentD.substring(4, 6)); //提取租书日期的月份 + int d1 = Integer.parseInt(rentD.substring(6, 8)); //提取租书日期的日子 + c.set(y1, m1, d1); //转化为日期型 + long getDate = c.getTimeInMillis(); //租书时间转化为毫秒数 + + int y2 = Integer.parseInt(sendD.substring(0, 4)); //提取还书日期的年份 + int m2 = Integer.parseInt(sendD.substring(4, 6)); //提取还书日期的月份 + int d2 = Integer.parseInt(sendD.substring(6, 8)); //提取还书日期的日子 + c.set(y2, m2, d2); + long sendDate = c.getTimeInMillis(); //还书时间转化为毫秒数 + + long rentDays = (sendDate - getDate) / (1000 * 60 * 60 * 24); //计算租书和还书日期相差天数 + return rentDays; + } + } +} \ No newline at end of file diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/test/Test.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/test/Test.java new file mode 100755 index 0000000..0312fdc --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/test/Test.java @@ -0,0 +1,27 @@ +package cn.vscoder.experiment_3.test; + +import cn.vscoder.experiment_3.book.Book; +import cn.vscoder.experiment_3.book.RentBook; +import cn.vscoder.experiment_3.reader.Reader; +import cn.vscoder.experiment_3.reader.VIPReader; + +public class Test { + public static void main(String[] args) { + Book book=new Book("9787508353937","Head First设计模式","Eric Freeman / Elisabeth Freeman","中国电力出版社",128); + System.out.println(book.getBookName()); + book.setPrice(book.getPrice()*0.8); + System.out.println(book); + Reader reader1=new Reader(); + Reader reader2=new Reader(); + System.out.println(reader1); + System.out.println(reader2); + RentBook rentBook=new RentBook("97875","设计模式","Eric Freeman","北京大学出版社",128,"in0001"); + System.out.println(rentBook); + VIPReader vipreader1=new VIPReader("张三","VIP"); + VIPReader vipreader2=new VIPReader("李四","普通会员"); + VIPReader vipreader3=new VIPReader("王二","非会员"); + System.out.println(vipreader1); + System.out.println(vipreader2); + System.out.println(vipreader3); + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManage.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManage.java new file mode 100755 index 0000000..2b774c1 --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManage.java @@ -0,0 +1,38 @@ +package cn.vscoder.experiment_3.test; + +import cn.vscoder.experiment_3.book.RentBook; +import cn.vscoder.experiment_3.common.PayException; +import cn.vscoder.experiment_3.reader.VIPReader; +import cn.vscoder.experiment_3.rent.RentBookManage; + +public class TestRentBookManage { + public static void main(String[] args) throws PayException { + System.out.println("欢迎进入图书租阅管理系统！"); + RentBookManage bm = new RentBookManage(); + bm.addBook(new RentBook("0001", "java", "王三", "南京大学出版社", 23.5, "in001")); + bm.addBook(new RentBook("0002", "eclipse", "王婆", "北京大学出版社", 53.5, "in002")); + bm.addBook(new RentBook("0003", "数据结构", "张斯", "清华大学出版社", 45.5, "in003")); + bm.addBook(1, new RentBook("0004", "数据分析", "鱼鱼", "忧伤出版社", 45.3, "in005")); + bm.displayAllBooks(); + RentBook rentBook = bm.searchBook("java"); + bm.editBook("java", 100); + bm.deleteBook("数据分析"); + bm.displayAllBooks(); + + bm.addReader(new VIPReader("张三", "普通会员")); + bm.addReader("李四", "VIP"); + bm.addReader("王二", "非会员"); + bm.displayAllReaders(); + + if (bm.rentBook(bm.readerlist.get(0), bm.searchBook("eclipse"), 10)) { + bm.printRentlist(); + } else { + bm.readerlist.get(0).setBalance(100); + + } + bm.rentBook(bm.readerlist.get(0), bm.searchBook("eclipse"), 10); + bm.printRentlist(); + + + } +} diff --git a/java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManageNew.java b/java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManageNew.java new file mode 100644 index 0000000..1b2f3f3 --- /dev/null +++ b/java-lesson/src/main/java/cn/vscoder/experiment_3/test/TestRentBookManageNew.java @@ -0,0 +1,59 @@ +package cn.vscoder.experiment_3.test; + +/* 测试功能：测试图书和读者的添加功能，并调用相关方法测试借书与还书功能 */ +import cn.vscoder.experiment_3.rent.*; // 导入 rent 包中的所有类 + +public class TestRentBookManageNew { + public static void main(String args[]) { + System.out.println("RentBookManagenew 测试程序开始："); + RentBookManagenew bm = new RentBookManagenew(); + + /* 测试图书的添加和显示 */ + bm.addBook("978-7-305-13888-3", "Java 课程设计指导", "施伯乐", "南京大学出版社", 31, "IT-202-01"); + bm.addBook("978-7-103-01234-2", "数据结构", "严蔚敏", "清华大学出版社", 41.2, "IT-401-01"); + bm.addBook("978-7-113-07777-1", "VB学习与考研指导", "施伯乐", "中国铁道出版社", 35, "IT-301-01"); + + bm.displayBook(); // 显示所有图书信息 + + System.out.println("\n调用 editBook(“978-7-113-07777-1”, 28.5)："); + bm.editBook("978-7-113-07777-1", 28.5); // 修改图书价格 + + /* 测试读者的添加和设置余额 */ + System.out.println("\n调用 addReader() 和 setBalance(1000 / 500 / 80)："); + bm.addReader("张三", "普通会员"); + bm.addReader("李四", "非会员"); + bm.addReader("王小强", "VIP"); + bm.readerlist.get(0).setBalance(1000); // 第1位读者余额为1000 + bm.readerlist.get(1).setBalance(500); // 第2位读者余额为500 + bm.readerlist.get(2).setBalance(80); // 第3位读者余额为80 + + bm.displayReader(); // 显示所有读者信息 + + /* 测试图书租借功能 */ + System.out.println("\n测试图书租借与归还功能："); + + // 1号读者借了图书1，租借日期：2017年7月7日 + bm.addRentRecord(bm.booklist.get(0), bm.readerlist.get(0), "20170707"); + + // 2号读者借了图书2，租借日期：2019年9月9日 + bm.addRentRecord(bm.booklist.get(1), bm.readerlist.get(1), "20190909"); + + // 2号读者归还图书2，归还日期：2020年2月18日 + bm.returnBook(bm.booklist.get(1), bm.readerlist.get(1), "20200218"); + + // 3号读者借了图书2，租借日期：2020年3月1日 + bm.addRentRecord(bm.booklist.get(1), bm.readerlist.get(2), "20200301"); + + // 2号读者试图归还图书3（未借出），归还日期：2020年6月16日（测试失败情况） + bm.returnBook(bm.booklist.get(2), bm.readerlist.get(1), "20200616"); + + // 1号读者归还图书1，归还日期：2020年10月1日 + bm.returnBook(bm.booklist.get(0), bm.readerlist.get(0), "20201001"); + + System.out.println("\n显示所有归还记录："); + bm.displayReturnInfo(); // 显示所有归还记录 + + System.out.println("\n显示当前借阅清单："); + bm.displayRentInfo(); // 显示当前仍在借阅的图书记录 + } +} \ No newline at end of file