        this.bookId = bookId;
    }

    public String getBookName(){
        return bookName;
    }

    public void setBookName(String bookName){
        this.bookName = bookName;
    }

    public BookPrice getPrice(){
        return price;
    }

    public void setPrice(BookPrice price){
        this.price = price;
    }

}
</pre>


<pre class="prettyprint lang-java">
public class BookPrice implements Serializable{

    private double price; //价格
    private int country; //国家

    public double