ADD file via upload

BorrowHistory.java

@@ -0,0 +1,33 @@
+package jinjieti1;
+
+import java.io.Reader;
+import java.time.LocalDate;
+
+import jichuti1.Book;
+
+/**
+ * 图书借阅历史类
+ */
+public class BorrowHistory {
+    private String historyId;       // 历史记录ID
+    private jichuti1.Reader reader;          // 借阅人
+    private Book book;              // 借阅的图书
+    private LocalDate borrowDate;   // 借出日期
+    private LocalDate returnDate;   // 归还日期
+
+    public BorrowHistory(String historyId, jichuti1.Reader reader2, Book book, LocalDate borrowDate) {
+        this.historyId = historyId;
+        this.reader = reader2;
+        this.book = book;
+        this.borrowDate = borrowDate;
+    }
+
+    // 记录归还日期
+    public void returnBook(LocalDate returnDate) {
+        this.returnDate = returnDate;
+    }
+
+    // getter
+    public String getHistoryId() { return historyId; }
+    public String getBookTitle() { return book.getTitle(); }
+}