java httpClient提交表单

一下是表单的源码：
<form id="websiteSearchForm" method="get" action="" onsubmit="$('searchresultdivstep').innerHTML='Step 1/10: Detecting Website'; doAjaxDots('searchresultdiv','/ajax/websiteestimator_v2.cgi','post','url='+$('websiteSearchText1').value);return false;" style="display:inline;">
  <div class="search">    <div class="search_input">
    <input id="websiteSearchText1" name="websitesearch" type="text" value="http://" />
    </div>
    <div class="search_btn">
    <input id="websiteSearchSubmit1" name="" type="image" src="/images/search_btn.gif" />
    </div>
<br />
<span style="float:left;">
<span id="searchresultdivstep" style="font-size:1.2em; color:#0000FF; font-weight:bold;">
<table><tr><td align=center><img src="/images2/grab.gif" width=20></td><td align=center><span style="color:#000066; font-size:0.7em; text-decoration:underline;"><a href="/tools-and-services/">Get this Search on your Website</a></span></td><td valign=center><img src="/images2/grab.gif" width=20></td></tr></table></span><br />
<span id="searchresultdiv"></span>
</span>
  </div>
</form>
我给怎么用httpClient提交参数并获取传回来的值？麻烦给说详细点，最后贴上代码，谢谢！