the character encoding returned by
 <code>getCharacterEncoding</code> cannot be used</dd>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io" class="externalLink">IOException</a></code> - if an input or output exception occurred</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="ServletResponse.html#getOutputStream()"><code>ServletResponse.getOutputStream()</code></a>, 
<a href="ServletResponse.html#set