URL myUrl = new URL(searchURL);
URLConnection myConn = (HttpURLConnection)myUrl.openConnection();
myConn.setRequestProperty("User-agent","Mozilla/4.0");
BufferedReader br = new BufferedReader(new InputStreamReader(myConn.getInputStream()));

myConn.setRequestProperty("User-agent","Baiduspider ( http://www.baidu.com/search/spider.htm)");
myConn.setRequestProperty("User-agent","Mozilla/4.0"); 

HttpURLConnection.setFollowRedirects(true);
httpConn.setRequestMethod("GET"); 
httpConn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)"); 


HttpRequest   request   =   new   HttpRequest("http://服务器/1.jsp");   
   第一次使用的是GET方式   
   request.setMethod("GET");   
   紧接着进行一些请求的属性设置   
   request.setRequestHeader("Cache-Control",   "no-cache");   
   这里保持连接，因为后面还要发送数据到服务器呢   
   request.setRequestHeader("Connection",   "Keep-Alive");   
   下面是一些无关紧要的属性设置了。   

  request.setRequestHeader("Accept",   "image/gif,   image/x-xbitmap,  
image/jpeg,   image/pjpeg,   application/vnd.ms-excel,  
application/vnd.ms-powerpoint,   application/msword,   */*");   
   request.setRequestHeader("Accept-Encoding",   "gzip,   deflate");   
   request.setRequestHeader("Accept-Language",   "en-au");   
   request.setRequestHeader("Referer",   "http://服务器/1.jsp");   

  request.setRequestHeader("User-Agent",   "Mozilla/4.0   (compatible;
  MSIE   6.0;   Windows   NT   5.1;   .NET   CLR   1.0.3215;   .NET  
CLR   1.0.3705)");   
      
   构造好了连接请求，然后连接   
   request.connect();   
      
   紧接着提取Cookie值，在后文的post中可以用到。   
   String   strCookie   =   request.getResponseHeader("Set-Cookie");   
   strCookie   =   strCookie.substring(0,strCookie.indexOf(";"));   
      
   下面通过循环查找，提取__VIEWSTATE的值   
   for   (   int   i   =   0;   i   <   nlist.getLength();   i++)   {   
      node   =   nlist.item(i);   
      strName   =   getNodeAttributeValue(node,"name");   
      if   (   strName.equals("__VIEWSTATE")   )   {   
         strValue   =   getNodeAttributeValue(node,"value");   
         break;   
      }   
   }   
      
   往服务器组织发送数据   
   DataOutputStream   dos   =   new   DataOutputStream(request.getOutputStream());   
   dos.writeBytes("-----------------------------"+strBoundary);//这是每个要被发送数据间的间隔   
   dos.writeBytes("/r/nContent-Disposition:   form-data;   name=/"__VIEWSTATE/"");   
   dos.writeBytes("/r/n/r/n"+strValue);   
   dos.writeBytes("/r/n-----------------------------"+strBoundary);   
   这里面是发送文件的部分   

  dos.writeBytes("/r/nContent-Disposition:   form-data;  
name=/"uploadfile1/";   filename=/""   +   strFileName   +   "/"");   
   dos.writeBytes("/r/nContent-Type:   text/xml");   
   dos.writeBytes("/r/n/r/n");   
   dos.writeBytes(new   String(data));   
   dos.writeBytes("/r/n-----------------------------"+strBoundary);   
   dos.writeBytes("/r/nContent-Disposition:   form-data;   name=/"Button1/"");   
   dos.writeBytes("/r/n上传");   
   dos.writeBytes("/r/n-----------------------------"+strBoundary+"--");   
   dos.writeBytes("/r/n");   
   dos.close();