title: Do I need to close 'PreparedStatement'?
body: <p>I have a website which is getting a massive number of hits. I'm experienced problems, including JDBC connection errors.</p>
  <p>I'm a bit confused about closing <code>PreparedStatement</code>. Do I need to close <code>PreparedStatement</code> or is it just enough to only close <code>Statement</code>?</p>
  <p>Also, what about <code>ResultSet</code>? Do I need to close it too?</p>