如何用 Java SE 写一个简易的 HTTP 服务器？如果要支持 JSP ，ASP 或者 PHP 又需要如何改进？如果不能，是否有其他语言可以实现？

<code class="coffee-script"><span class="nv">server = </span><span class="nx">httpService</span><span class="p">.</span><span class="nx">createServer</span><span class="p">()</span>
<span class="nx">server</span><span class="p">.</span><span class="nx">on</span> <span class="s">'http request'</span><span class="p">,</span> <span class="nf">(req, res)-></span>
  <span class="nv">req_ext = </span><span class="nx">req</span><span class="p">.</span><span class="nx">require_url</span><span class="p">.</span><span class="nx">split</span> <span class="sr">/\.[asp|php|jsp|do]/i</span>
  <span class="k">switch</span> <span class="nx">req_ext</span>
    <span class="nx">case</span> <span class="s">'php'</span><span class="o">:</span>
      <span class="nx">res</span><span class="p">.</span><span class="nx">send</span> <span class="nx">os</span><span class="p">.</span><span class="nx">execute</span> <span class="s">'php req.require_url'</span>
    <span class="nx">case</span> <span class="s">'asp'</span><span class="o">:</span>
      <span class="nx">res</span><span class="p">.</span><span class="nx">pip</span> <span class="nx">http</span><span class="p">.</span><span class="nx">require</span> <span class="s">'IIS server...'</span>
    <span class="nx">case</span> <span class="s">'do'</span><span class="p">,</span> <span class="s">'jsp'</span><span class="o">:</span>
      <span class="nx">res</span><span class="p">.</span><span class="nx">send</span> <span class="nx">http</span><span class="p">.</span><span class="nx">require</span> <span class="s">'Tomcat server...'</span>
    <span class="nv">default:</span>
      <span class="nx">res</span><span class="p">.</span><span class="nx">send</span> <span class="nx">file</span><span class="p">.</span><span class="nx">read</span> <span class="s">''</span> <span class="k">if</span> <span class="nx">file</span><span class="p">.</span><span class="nx">exist</span> 
</code>