package dao
import models.BookModel
import scala.collection.mutable.ListBuffer
class 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List
books += 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()
}
}
