catalogservice.java

模仿当当网基于struts+hierbernate与mysql的商务网站。

package org.whatisjava.dang.service;

import java.util.List;

import org.apache.log4j.Logger;
import org.whatisjava.dang.dao.BookDao;
import org.whatisjava.dang.dao.CategoryDao;
import org.whatisjava.dang.domain.Book;
import org.whatisjava.dang.domain.Category;

public class CatalogService {
	private static Logger logger = Logger.getLogger(CatalogService.class);
	private CategoryDao categoryDao = new CategoryDao();
	private BookDao bookDao = new BookDao();
	
	/*
	 * Category相关
	 ------------------------------------------*/
	public Category findCategoryById(int id){
		return categoryDao.findById(id);
	}
	public List<Category> findCategoryByParentId(int pId){
		return categoryDao.findByParentId(pId);
	}
	
	/*
	 * Book相关
	 =======================================================*/
	public List findBookByPage(int cId,int orderBy, int numPerPage, int page) {
		return bookDao.findBookByPage(cId,orderBy, numPerPage, page);
	}
	public int getBookTotalPageNum(int cId,int numPerPage){
		return bookDao.getBookTotalPageNum(cId, numPerPage);
	}
	public Book getBookById(int id) {
		return bookDao.getById(id);
	}
}