HttpClient + Jsoup 模拟登陆,解析HTML,信息筛选（广工图书馆）
HttpClient + Jsoup 模拟登陆,解析HTML获取信息
 
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最近在做一个校园综合Android客户端，主要是想把学校各类网站信息进行整合，放在一个平台上，供学校学生阅览。
 
思路如下：
 
拿广东工业大学图书馆网站作为一个例子
实现目标：用个人账号登陆图书馆并获取到个人借阅情况。
登陆地址222.200.98.171:81/login.aspx
这里会用到Chrome的开发者工具（浏览器按F12可以开启）
 
打开登陆界面的源码,下面是源码中的form标签
 
 
 
    Html代码
用户登录界面设计代码html
   
 
 
 
  <formname="aspnetForm"method="post"action="login.aspx?ReturnUrl=%2fuser%2fuserinfo.aspx"onsubmit="javascript:returnWebForm_OnSubmit();"id="aspnetForm"> 
  <div> 
  <inputtype="hidden"name="__EVENTTARGET"id="__EVENTTARGET"value=""/> 
  <inputtype="hidden"name="__EVENTARGUMENT"id="__EVENTARGUMENT"value=""/> 
  <inputtype="hidden"name="__VIEWSTATE"id="__VIEWSTATE"value="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"/> 
  </div> 
   
  <scripttype="text/javascript"> 
  //<![CDATA[ 
  vartheForm=document.forms[‘aspnetForm’]; 
  if(!theForm){ 
  theForm=document.aspnetForm; 
  } 
  function__doPostBack(eventTarget,eventArgument){ 
  if(!submit||(submit()!=false)){ 
  theForm.__EVENTTARGET.value=eventTarget; 
  theForm.__EVENTARGUMENT.value=eventArgument; 
  theForm.submit(); 
  } 
  } 
  //]]> 
  </script> 
   
   
  <scriptsrc="/WebResource.axd?d=kbLQnwjf5uNQN4GcWRC5kD1rIySOzkR3uLyKE5xUO0j4Fa2lQPZwQlk_qYaspRXtlojncSBfRJNkA00qXOMQqsKd8WY1&amp;t=634751988274393221"type="text/javascript"></script> 
   
   
  <scriptsrc="/WebResource.axd?d=nsbO6ZJty6_6fuRufFNYnRiJ-xEoD0xQr70NX6g0v64gngATPLSnyyt7jyZkELLW6THXmh92_m0Y5TyvhES_-JroQeU1&amp;t=634751988274393221"type="text/javascript"></script> 
  <scripttype="text/javascript"> 
  //<![CDATA[ 
  functionWebForm_OnSubmit(){ 
  if(typeof(ValidatorOnSubmit)=="function"&&ValidatorOnSubmit()==false)returnfalse; 
  returntrue; 
  } 
  //]]> 
  </script> 
   
  <div> 
   
  <inputtype="hidden"name="__EVENTVALIDATION"id="__EVENTVALIDATION"value="/wEWBQKa7ezdCwKOmK5RApX9wcYGAsP9wL8JAqW86pcIaBhXmFYzd5pGDTk/afln2TfArPw="/> 
  </div> 
  <inputname="ctl00$ContentPlaceHolder1$txtlogintype"type="hidden"id="ctl00_ContentPlaceHolder1_txtlogintype"value="0"/> 
  <divid="Login"class="clearFix"> 
  <divclass="LoginTitle"> 
  登录我的图书馆 
  </div> 
   
   
  <divclass="LeftLogin"> 
  <divclass="LoginDiv"> 
   
  <divclass="loginContent"> 
  <divclass="loginInfo"> 
  <spanclass="leftInfo">图书证号：</span> 
  <spanclass="rightInfo"> 
  <inputname="ctl00$ContentPlaceHolder1$txtUsername_Lib"type="text"id="ctl00_ContentPlaceHolder1_txtUsername_Lib"class="txtInput"autocomplete="off"/><spanid="ctl00_ContentPlaceHolder1_rfv_UserName_Lib">请输入证号</span> 
  </span> 
  </div> 
  <divclass="loginInfo"> 
  <spanclass="leftInfo">密&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;码：</span> 

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