code: public static boolean createFolder(String folderPath) {
          if (!StringUtils.isEmpty(folderPath)) {
              File folder = new File(folderPath);
              return createFolder(folder);
          }
          return false;
      }
docs: Create a folder, If the folder exists is not created.
  
  @param folderPath folder path.
  
  @return True: success, or false: failure.