验证图片上传

/***
  * 验证图片上传
  * @param forefile
  * @return
  */
 public static boolean validateImageFileType(FormFile formfile){
  if(formfile != null && formfile.getFileSize() > 0){
   List<String> arrowType = Arrays.asList("image/gif","image/jpg","image/bmp","image/png","image/jpeg","image/pjpeg");
   String ext = formfile.getFileName().substring(formfile.getFileName().lastIndexOf(".")+1).toLowerCase();
   List<String> arrowExtension = Arrays.asList("gif","jpg","bmp","png");
   return arrowType.contains(formfile.getContentType().toLowerCase())&&arrowExtension.contains(ext);
  }
  return true;
 }

 

 

 

/***
  * 验证上传文件类型是否属于图片格式(利用反射技术实现)
  * @param propertyName Brand中的属性名称
  * @return
  * @throws Exception
  */
 /*
 public staticboolean validateFileType(String propertyName) throws Exception{
  PropertyDescriptor[] propertydesc = Introspector.getBeanInfo(this.getClass()).getPropertyDescriptors();
  boolean exsit = false;
  for(PropertyDescriptor property : propertydesc){
   if(property.getName().equals(propertyName)){
    Method method = property.getReadMethod();
    if(method != null){
     exsit = true;
     FormFile forefile = (FormFile)method.invoke(this);
     if(forefile != null && forefile.getFileSize() > 0){
      List<String> arrowType = Arrays.asList("image/gif","image/jpg","image/bmp","image/png","image/jpeg","image/pjpeg");
      return arrowType.contains(forefile.getContentType().toLowerCase());
     }
    }else{
     new RuntimeException(propertyName + "属性getter方法不存在");
    }
   }
  }
  if(!exsit)new RuntimeException(propertyName + "属性不存在");
  return true;
 }*/