通过网络连接获取html字符串

 public String getHTML(String url)
    {
        try{
            URL newUrl=new URL(url);
            URLConnection connect=newUrl.openConnection();
            DataInputStream dis=new DataInputStream(connect.getInputStream());
            BufferedReader in = new BufferedReader(new InputStreamReader(dis,"UTF-8"));//目标页面编码为UTF-8
            String html="";
            String readLine=null;
            while((readLine=in.readLine())!=null)
            {
                html=html+readLine;
            }
            in.close();
            return html;
        }catch(MalformedURLException me){
        }
        catch(IOException ioe){
        }
        return null;
    }