package com.how2java.tmall.service;

import java.util.List;

import com.how2java.tmall.pojo.Category;
import com.how2java.tmall.util.Page;

public interface CategoryService{
	
	public List list();

	public void save(Category category);
	
	public int total();

	public List<Category> listByPage(Page page);

	public void delete(Category category);

	public Category get(Class clazz, int id);

	public void update(Category category);
}

package com.how2java.tmall.service.impl;

import java.util.List;

import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Order;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.how2java.tmall.dao.impl.DAOImpl;
import com.how2java.tmall.pojo.Category;
import com.how2java.tmall.service.CategoryService;
import com.how2java.tmall.util.Page;

@Service
public class CategoryServiceImpl  implements CategoryService {

	@Autowired DAOImpl dao;
	@Override
	public List list() {
		DetachedCriteria dc = DetachedCriteria.forClass(Category.class);
		dc.addOrder(Order.desc("id"));
		return dao.findByCriteria(dc);
	}
	@Override
	public int total() {
		String hql = "select count(*) from Category ";
		List<Long> l= dao.find(hql);
		if(l.isEmpty())
			return 0;
		Long result= l.get(0);
		return result.intValue();
	}
	@Override
	public List<Category> listByPage(Page page) {
		DetachedCriteria dc = DetachedCriteria.forClass(Category.class);
		dc.addOrder(Order.desc("id"));
		return dao.findByCriteria(dc,page.getStart(),page.getCount());
	}
	@Override
	public void save(Category category) {
		dao.save(category);
	}
	@Override
	public void delete(Category category) {
		dao.delete(category);
		
	}
	@Override
	public Category get(Class clazz, int id) {
		return (Category) dao.get(clazz, id);
	}
	@Override
	public void update(Category category) {
		dao.update(category);
	}
}

package com.how2java.tmall.action;
 
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.List;
 
import javax.imageio.ImageIO;
 
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Namespace;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;
import org.springframework.beans.factory.annotation.Autowired;
 
import com.how2java.tmall.pojo.Category;
import com.how2java.tmall.service.CategoryService;
import com.how2java.tmall.util.ImageUtil;
import com.how2java.tmall.util.Page;
 
@Namespace("/")
@ParentPackage("basicstruts")  
@Results(
        {
            /*分类管理*/
            @Result(name="listCategory", location="/admin/listCategory.jsp"),
            @Result(name="listCategoryPage", type = "redirect", location="/admin_category_list"),
            @Result(name="editCategory", location="/admin/editCategory.jsp"),
        })
public class CategoryAction {
    @Autowired
    CategoryService categoryService;
 
    List<Category> categorys;
     
    Category category;
     
    File img;
 
    Page page;
     
    @Action("admin_category_list")
    public String list() {
         
        if(page==null)
            page = new Page();
        int total = categoryService.total();
        page.setTotal(total);
        categorys = categoryService.listByPage(page);
        return "listCategory";
    }
     
    @Action("admin_category_add")
    public String add() {
        categoryService.save(category);
        File  imageFolder= new File(ServletActionContext.getServletContext().getRealPath("img/category"));
        File file = new File(imageFolder,category.getId()+".jpg");
        try {
            FileUtils.copyFile(img, file);
            BufferedImage img = ImageUtil.change2jpg(file);
            ImageIO.write(img, "jpg", file);            
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "listCategoryPage";
    }   
     
    @Action("admin_category_delete")
    public String delete() {
        categoryService.delete(category);
        return "listCategoryPage";
    }   
     
    @Action("admin_category_edit")
    public String edit() {
        int id = category.getId();
        category = categoryService.get(Category.class,id);
        return "editCategory";
    }   
 
    @Action("admin_category_update")
    public String update() {
        categoryService.update(category);
        if(null!=img){
            File  imageFolder= new File(ServletActionContext.getServletContext().getRealPath("img/category"));
            File file = new File(imageFolder,category.getId()+".jpg");
            try {
                FileUtils.copyFile(img, file);
                BufferedImage img = ImageUtil.change2jpg(file);
                ImageIO.write(img, "jpg", file);
            } catch (IOException e) {
                 
                e.printStackTrace();
            }           
        }
 
        return "listCategoryPage";
    }   
     
    public List<Category> getCategorys() {
        return categorys;
    }
 
    public void setCategorys(List<Category> categorys) {
        this.categorys = categorys;
    }
 
    public Page getPage() {
        return page;
    }
 
    public void setPage(Page page) {
        this.page = page;
    }
 
    public Category getCategory() {
        return category;
    }
 
    public void setCategory(Category category) {
        this.category = category;
    }
 
    public File getImg() {
        return img;
    }
 
    public void setImg(File img) {
        this.img = img;
    }
 
}