bookservice.java

一个经典购物车（shoppingcart）实例代码

package com.jpioneer.application.book.service;

import java.util.List;

import com.jpioneer.application.book.domain.Book;

public interface BookService {
   public void saveBook(Book b)throws Exception;
   public boolean isExists(int id) throws Exception;
   public List listAllBooks() throws Exception;
}