docs: public static InputStream loadFile(String filePath) {
  
          InputStream in = null;
  
          try {
  
              // 先用TOMCAT模式进行导入
              in = ClassLoaderUtil.getLoader().getResourceAsStream(filePath);
              if (in == null) {
  
                  // 使用普通模式导入
                  try {
  
                      return new FileInputStream(filePath);
  
                  } catch (FileNotFoundException e) {
                      return null;
                  }
              } else {
  
                  return in;
              }
  
          } finally {
  
              if (in != null) {
                  try {
                      in.close();
                  } catch (IOException e) {
                      LOGGER.error("WHY HERE!", e);
                  }
              }
          }
      }