java获取网页源代码

public static String getHtmlContent(URL url, String encode) {
   StringBuffer contentBuffer = new StringBuffer();

   int responseCode = -1;
   HttpURLConnection con = null;
   try {
    con = (HttpURLConnection) url.openConnection();
    con.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");// IE代理进行下载
    con.setConnectTimeout(60000);
    con.setReadTimeout(60000);
    // 获得网页返回信息码
    responseCode = con.getResponseCode();
    if (responseCode == -1) {
     String re = url.toString() + " : connection is failure...";
     con.disconnect();
     return re;
    }
    if (responseCode >= 400) // 请求失败
    {
     String re = "请求失败:get response code: " + responseCode;
     con.disconnect();
     return re;
    }

    InputStream inStr = con.getInputStream();
    InputStreamReader istreamReader = new InputStreamReader(inStr, encode);
    BufferedReader buffStr = new BufferedReader(istreamReader);

    String str = null;
    while ((str = buffStr.readLine()) != null)
     contentBuffer.append(str);
    inStr.close();
   } catch (IOException e) {
    e.printStackTrace();
    contentBuffer = null;
    System.out.println("error: " + url.toString());
   } finally {
    con.disconnect();
   }
   return contentBuffer.toString();
  }

  public static String getHtmlContent(String url, String encode) {
   if (!url.toLowerCase().startsWith("http://")) {
    url = "http://" + url;
   }
   try {
    URL rUrl = new URL(url);
    return getHtmlContent(rUrl, encode);
   } catch (Exception e) {
    e.printStackTrace();
    return "网址错误！";
   }
  }
  //测试
  public static void main(String argsp[]){
   System.out.println(getHtmlContent("www.ilkhome.cn","utf-8")) ;
   
  }