title: How to get the html contents of millions urls links
body: <p>Given a url link, I want to get the contents of the page in html format .In Java,I know that I can implement this with <code>getInputStream</code> method.</p>
  
  <p>Question is that, now I have millions of URLs. And want to get the html pages of them. If I still use the <code>getInputStream</code>. It is time-consuming and the performance is bad.  So I want to speed up the fetch page process.</p>
  
  <p>Hope to get efficient method and high speed to do this.</p>
  
  <p>Thanks in advance!</p>