上传图片-蒲公英云

上传图片

@Service
public class FileServiceImpl implements FileService {
    private String localPath = "E:/jt-upload/";//本地磁盘路径
    private String urlPath = "http://image.jt.com/";
    /*
     * 1.判断文件是否为图片  .jpg|png|gif
     * 2.判断是否为恶意程序
     * 3.分文件存储
     * 4.保证文件不重名
     */
    @Override
    public PicUploadResult uploadFile(MultipartFile uploadFile) {
        PicUploadResult result = new PicUploadResult();
        //1.获取图片名称   ABC.JPG|PNG|GIF
        String fileName = uploadFile.getOriginalFilename();
        fileName = fileName.toLowerCase();//将字符全部小写
        //2.使用正则表达式判断
        if(!fileName.matches("^.*(jpg|png|gif)$")){
            result.setError(1);//表示不是图片
            return result;
        }
        //3.判断图片是否为恶意程序
        try {
            BufferedImage bufferedImage = 
                    ImageIO.read(uploadFile.getInputStream());
            int width = bufferedImage.getWidth();
            int height = bufferedImage.getHeight();
            if(width == 0 || height ==0){
                result.setError(1);
                return result;
            }
            //4.为了实现分文件存储 yyyy/MM/dd
            String dateDir = 
        new SimpleDateFormat("yyyy/MM/dd")
        .format(new Date()).toString();
            //创建文件夹   E:/jt-upload/2018/11/11
            String fileDir = localPath + dateDir;
            File dirFile = new File(fileDir);
            if(!dirFile.exists()){
                dirFile.mkdirs();
            }
            /*
             * 5.防止文件重名
             *      5.1截取文件的后缀
             *   5.2使用UUID当文件名 + 随机数3位
             */
            String fileType = 
                    fileName.substring(fileName.lastIndexOf("."));
            String UUIDName = UUID.randomUUID().toString()
                    .replace("-", "");
            int randomNum = new Random().nextInt(1000);
            //fa907e5e9f9a11e891a854ee75ecd89b123.jpg
            String realFileName = UUIDName + randomNum + fileType;
            //实现文件上传
            /**
             * E:jt-upload/yyyy/MM/dd/54ee75ecd89b123.jpg
             */
            String realLocalPath = fileDir + "/" + realFileName;
            uploadFile.transferTo(new File(realLocalPath));
            //设定图片宽度和高度
            result.setHeight(height +"");
            result.setWidth(width + "");
            /**
             * 现图片回显 定义网络请求路径
             * http://image.jt.com/yyyy/MM/ddasdfasdfadsfasdf.jpg
             */
            String realUrlPath = urlPath + dateDir + "/" + realFileName;
            result.setUrl(realUrlPath);
        } catch (Exception e) {
            e.printStackTrace();
            //不是图片
            result.setError(1);
            return result;
        }
        return result;
    }
}
<!-- 文件上传组件 -->
<dependency>
     <groupId>commons-fileupload</groupId>
     <artifactId>commons-fileupload</artifactId>
     <version>1.3.1</version>
 </dependency>
 <dependency>
     <groupId>org.apache.commons</groupId>
     <artifactId>commons-lang3</artifactId>
     <version>3.3.2</version>
 </dependency>