<div class="panel panel-warning addDiv">
        <div class="panel-heading">新增分类</div>
        <div class="panel-body">
            <form method="post" id="addForm" action="admin_category_add" enctype="multipart/form-data">
                <table class="addTable">
                    <tr>
                        <td>分类名称</td>
                        <td><input  id="name" name="name" type="text" class="form-control"></td>
                    </tr>
                    <tr>
                        <td>分类圖片</td>
                        <td>
                            <input id="categoryPic" accept="image/*" type="file" name="image" />
                        </td>
                    </tr>
                    <tr class="submitTR">
                        <td colspan="2" align="center">
                            <button type="submit" class="btn btn-success">提 交</button>
                        </td>
                    </tr>
                </table>
            </form>
        </div>

<script>
$(function(){
	
	$("#addForm").submit(function(){
		if(!checkEmpty("name","分类名称"))
			return false;
		if(!checkEmpty("categoryPic","分类图片"))
			return false;
		return true;
	});
});

</script>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.how2java.tmall.mapper.CategoryMapper">
    <select id="list" resultType="Category">
        select * from   category         order by id desc
        <if test="start!=null and count!=null">
            limit #{start},#{count}
        </if>

    </select>
    <select id="total" resultType="int">
        select count(*) from category
    </select>
    <insert id="add"  keyProperty="id"  useGeneratedKeys="true" parameterType="Category" >
        insert into category ( name ) values (#{name})
    </insert>
</mapper>

package com.how2java.tmall.mapper;

import com.how2java.tmall.util.Page;
import com.how2java.tmall.pojo.Category;
 
import java.util.List;
 
public interface CategoryMapper {
     List<Category> list(Page page);

     int total();

     void add(Category category);
}

package com.how2java.tmall.service;

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

public interface CategoryService{
    int total();
    List<Category> list(Page page);

    void add(Category category);

}

package com.how2java.tmall.service.impl;
import com.how2java.tmall.util.Page;
import com.how2java.tmall.mapper.CategoryMapper;
import com.how2java.tmall.pojo.Category;
import com.how2java.tmall.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class CategoryServiceImpl  implements CategoryService {
    @Autowired
    CategoryMapper categoryMapper;
    @Override
    public List<Category> list(Page page) {
        return categoryMapper.list(page);
    }

    @Override
    public int total() {
        return categoryMapper.total();
    }

    @Override
    public void add(Category category) {
        categoryMapper.add(category);
    }
}

package com.how2java.tmall.util;

import org.springframework.web.multipart.MultipartFile;
 
public class UploadedImageFile {
    MultipartFile image;
 
    public MultipartFile getImage() {
        return image;
    }
 
    public void setImage(MultipartFile image) {
        this.image = image;
    }
 
}

package com.how2java.tmall.util;
 
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferInt;
import java.awt.image.DirectColorModel;
import java.awt.image.PixelGrabber;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import java.awt.image.WritableRaster;
import java.io.File;
import java.io.IOException;
 
import javax.imageio.ImageIO;
 
public class ImageUtil {
 
    public static BufferedImage change2jpg(File f) {
        try {
            Image i = Toolkit.getDefaultToolkit().createImage(f.getAbsolutePath());
            PixelGrabber pg = new PixelGrabber(i, 0, 0, -1, -1, true);
            pg.grabPixels();
            int width = pg.getWidth(), height = pg.getHeight();
            final int[] RGB_MASKS = { 0xFF0000, 0xFF00, 0xFF };
            final ColorModel RGB_OPAQUE = new DirectColorModel(32, RGB_MASKS[0], RGB_MASKS[1], RGB_MASKS[2]);
            DataBuffer buffer = new DataBufferInt((int[]) pg.getPixels(), pg.getWidth() * pg.getHeight());
            WritableRaster raster = Raster.createPackedRaster(buffer, width, height, width, RGB_MASKS, null);
            BufferedImage img = new BufferedImage(RGB_OPAQUE, raster, false, null);
            return img;
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return null;
        }
    }
 
    public static void resizeImage(File srcFile, int width,int height, File destFile) {
        try {
            if(!destFile.getParentFile().exists())
                destFile.getParentFile().mkdirs();
            Image i = ImageIO.read(srcFile);
            i = resizeImage(i, width, height);
            ImageIO.write((RenderedImage) i, "jpg", destFile);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
     
    public static Image resizeImage(Image srcImage, int width, int height) {
        try {
 
            BufferedImage buffImg = null;
            buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            buffImg.getGraphics().drawImage(srcImage.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null);
 
            return buffImg;
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }
 
}

    @RequestMapping("admin_category_add")
    public String add(Category c, HttpSession session, UploadedImageFile uploadedImageFile) throws IOException {
        categoryService.add(c);
        File  imageFolder= new File(session.getServletContext().getRealPath("img/category"));
        File file = new File(imageFolder,c.getId()+".jpg");
        if(!file.getParentFile().exists())
            file.getParentFile().mkdirs();
        uploadedImageFile.getImage().transferTo(file);
        BufferedImage img = ImageUtil.change2jpg(file);
        ImageIO.write(img, "jpg", file);
        return "redirect:/admin_category_list";
    }

package com.how2java.tmall.controller;

import com.how2java.tmall.pojo.Category;
import com.how2java.tmall.service.CategoryService;
import com.how2java.tmall.util.ImageUtil;
import com.how2java.tmall.util.Page;
import com.how2java.tmall.util.UploadedImageFile;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.List;
 
@Controller
@RequestMapping("")
public class CategoryController {
    @Autowired
    CategoryService categoryService;
  
    @RequestMapping("admin_category_list")
    public String list(Model model,Page page){
        List<Category> cs= categoryService.list(page);
        int total = categoryService.total();
        page.setTotal(total);
        model.addAttribute("cs", cs);
        model.addAttribute("page", page);
        return "admin/listCategory";
    }

    @RequestMapping("admin_category_add")
    public String add(Category c, HttpSession session, UploadedImageFile uploadedImageFile) throws IOException {
        System.out.println(c.getId());
        categoryService.add(c);
        System.out.println(c.getId());
        File  imageFolder= new File(session.getServletContext().getRealPath("img/category"));
        File file = new File(imageFolder,c.getId()+".jpg");
        if(!file.getParentFile().exists())
            file.getParentFile().mkdirs();
        System.out.println(uploadedImageFile);
        System.out.println(uploadedImageFile.getImage());
        System.out.println(file);
        uploadedImageFile.getImage().transferTo(file);
        BufferedImage img = ImageUtil.change2jpg(file);
        ImageIO.write(img, "jpg", file);

        return "redirect:/admin_category_list";
    }

}