ler writes to only one file
 with no size limit.</p></div>
  <div class="jd-tagdata">
      <h5 class="jd-tagtitle">Parameters</h5>
      <table class="jd-tagtable">
        <tr>
          <th>pattern</td>
          <td>the name pattern for the output file.</td>
        </tr>
        <tr>
          <th>append</td>
          <td>the append mode.</td>
        </tr>
      </table>
  </div>
  <div class="jd-tagdata">
      <h5 class="jd-tagtitle">Throws</h5>
      <table class="jd-tagtable">  
        <tr>
    