docs: public void addFile(String path) throws LoadModelException{
  		try {
  			ArrayList<String[]> al = loadDict(path);		
  			add(al); 
  			indexLen = MIN_LEN;
  			createIndex();
  		} catch (IOException e) {
  			throw new LoadModelException("加载词典错误"+e.toString());
  		}
  	}