如何防止Java中出现403 HTTP错误代码? [英] How can I prevent a 403 HTTP error code in Java?

问题描述

我使用简单的代码获取 http://www.ip-adress.com 的html，但显示错误http代码403.我在其他网站(例如google.com)中尝试了该程序，它可以工作.我也可以在浏览器中打开www.ip-adress.com，为什么不能在Java程序中使用它.

I use simple code to get html for http://www.ip-adress.com, but it shows error http code 403. I try it in other website like google.com in program, it can work. i can also open www.ip-adress.com in browse, why i can't use it in java program.

 public class urlconnection
{
  public static void main(String[] args)
 {
    StringBuffer document = new StringBuffer();
    try 
    {
        URL url = new URL("http://www.ip-adress.com");
        URLConnection conn = url.openConnection();
        BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line = null;
        while ((line = reader.readLine()) != null)
        document.append(line + " ");
        reader.close();
    }
    catch (MalformedURLException e) 
    {
        e.printStackTrace(); 
    }
    catch (IOException e)
    {
        e.printStackTrace(); 
    }
    System.out.println(document.toString());
}
}



java.io.IOException: Server returned HTTP response code: 403 for URL: http://www.ip-adress.com/

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at urlconnection.main(urlconnection.java:14)

推荐答案

这是您需要的行

conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9.2.2) Gecko/20100316 Firefox/3.6.2");

引用此

这篇关于如何防止Java中出现403 HTTP错误代码?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！