code: public static void writeLine(BufferedWriter bw, String... params) throws IOException
      {
          for (int i = 0; i < params.length - 1; i++)
          {
              bw.write(params[i]);
              bw.write('\t');
          }
          bw.write(params[params.length - 1]);
      }
docs: 写数组，用制表符分割
  @param bw
  @param params
  @throws IOException