code: public static Properties load(String absolutePath) {
          Properties configs = new Properties();
          if (absolutePath == null) {
              return configs;
          }
          File configFile = new File(absolutePath);
          FileInputStream inStream = null;
          try {
              inStream = new FileInputStream(configFile);
              configs.load(new UnicodeInputStream(inStream).skipBOM());
          } catch (IOException e) {
              LOGGER.warn("Load " + absolutePath + " error!", e);
          } finally {
              try {
                  if (inStream != null) {
                      inStream.close();
                  }
              } catch (IOException ignore) {
                  // do nothing.
              }
          }
          return configs;
      }
docs: Read properties file.
  
  @param absolutePath absolute path in file system.