bean 用来存放分类信息，file 用来表示上传的文件。
bean: { id: 0, name: ''}, file: null getFile: function (event) { this.file = event.target.files[0]; }, add: function () { if(!checkEmpty(this.bean.name, "分类名称")) return; if(!checkEmpty(this.file, "分类图片")) return; var url = this.uri; //axios.js 上传文件要用 formData 这种方式 var formData = new FormData(); formData.append("image", this.file); formData.append("name", this.bean.name); axios.post(url,formData).then(function(response){ vue.list(0); vue.bean = { id: 0, name: '', hp: '0'}; $("#categoryPic").val(''); vue.file = null; }); }, 后端controller
@PostMapping("/categories") public Object add(Category bean, MultipartFile image, HttpServletRequest request) throws Exception { categoryService.add(bean); saveOrUpdateImageFile(bean, image, request); return bean; } public void saveOrUpdateImageFile(Category bean, MultipartFile image, HttpServletRequest request) throws IOException { File imageFolder= new File(request.getServletContext().getRealPath("img/category")); File file = new File(imageFolder,bean.getId()+".jpg"); if(!file.getParentFile().exists()) file.getParentFile().mkdirs(); image.transferTo(file); BufferedImage img = ImageUtil.change2jpg(file); ImageIO.write(img, "jpg", file); }service
public void add(Category bean) { categoryDAO.save(bean); } 工具类 change2jpg 确保图片文件的二进制格式是jpgresizeImage用于改变图片大小 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; } }