code: public void init(String path, String charset) throws IOException {
  		BufferedReader reader = FileUtil.getReader(path, charset);
  		try {
  			String line;
  			while(true) {
  				line = reader.readLine();
  				if(line == null) {
  					break;
  				}
  				this.add(line);
  			}
  		}finally {
  			IoUtil.close(reader);
  		}
  	}
docs: 通过文件初始化过滤器.
  
  @param path 文件路径
  @param charset 字符集
  @throws IOException IO异常