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);
}

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);
	}
}

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";
	}	

	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;
	}

}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" import="java.util.*"%>
 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@include file="../include/admin/adminHeader.jsp"%>
<%@include file="../include/admin/adminNavigator.jsp"%>

<title>编辑分类</title>

<div class="workingArea">

	<ol class="breadcrumb">
	  <li><a href="admin_category_list">所有分类</a></li>
	  <li class="active">编辑分类</li>
	</ol>

	<div class="panel panel-warning editDiv">
	  <div class="panel-heading">编辑分类</div>
	  <div class="panel-body">
	    	<form method="post" id="editForm" action="admin_category_update"  enctype="multipart/form-data">
	    		<table class="editTable">
	    			<tr>
	    				<td>分类名称</td>
	    				<td><input  id="name" name="category.name" value="${category.name}" type="text" class="form-control"></td>
	    			</tr>
	    			<tr>
	    				<td>分类圖片</td>
	    				<td>
	    					<input id="categoryPic" type="file" name="img" />
	    				</td>
	    			</tr>	    			
	    			<tr class="submitTR">
	    				<td colspan="2" align="center">
	    					<input type="hidden" name="category.id" value="${category.id}">
	    					<button type="submit" class="btn btn-success">提 交</button>
	    				</td>
	    			</tr>
	    		</table>
	    	</form>
	  </div>
	</div>	
</div>