categoryservice.java

基于mysql5.0完成的shopping网站后台

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package com.shopping.model;

import com.shopping.dao.CategoryDAO;
import com.shopping.dao.CategoryFactory;
import java.util.List;

/**
 *
 * @author Administrator
 */
public class CategoryService {
   private static CategoryDAO dao;
   private static CategoryService instance = null;
   private CategoryService(){
       dao = CategoryFactory.getDao();
   }
   
   public static CategoryService getInstance(){
     if(instance == null){
        instance = new CategoryService();
     }
     return instance;
   }
   
   
   //.................
   public  int save(Category c){
      return dao.save(c);
   }
    public List<Category> getCategorys(){
     return dao.getCategorys();
   }
   
  public void addChildCategory(int pid, String cname, String cdescr,int grade){
  dao.addChildCategory(pid, cname, cdescr, grade);
  }   
   public void delete(int id,int pid){
   dao.delete(id, pid);
   }
}