bookserviceimpl.java

一个经典购物车（shoppingcart）实例代码

package com.jpioneer.application.book.service.impl;

import java.util.List;

import com.jpioneer.application.book.dao.BookDAO;
import com.jpioneer.application.book.dao.impl.BookDaoImpl;
import com.jpioneer.application.book.domain.Book;
import com.jpioneer.application.book.service.BookService;


public class BookServiceImpl implements BookService {
	BookDAO dao=new BookDaoImpl();

	public void saveBook(Book b) throws Exception {
		dao.addBook(b);
		
	}

	public boolean isExists(int id) throws Exception {
		
		return dao.isExists(id);
	}

	public List listAllBooks() throws Exception {
		
		return dao.listAllBooks();
	}

}