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