图书展示功能2

package daoimport models.BookModelimport scala.collection.mutable.ListBufferclass BookDAO {//加载图书。从文件中读入def loadBooks():List[BookModel]={val books =new ListBuffer[BookModel]()val  source= scala.io.Source.fromFile("books.txt")for(line <-source.getLines()){val Array(id, name, author, available) = line.split(",")// 实例化一本书，保存到Listbooks += BookModel(id.toInt, name, author, available.toBoolean)}// 关闭连接source.close()books}// 保存图书。将图书写入文件def saveBooks(books: ListBuffer[BookModel]): Unit = {val writer = new java.io.PrintWriter(new java.io.File("books.txt"))for (book <- books) {writer.println(book.id + "," + book.name + "," + book.author + "," + book.available)}writer.close()}}