如何验证远程服务器上文件是否存在

转载：http://blog.csdn.net/soundfly/article/details/6177535

没有废话，只有代码。

 

 java.net.URL url = null;

 java.net.URLConnection urlCon;

 try {

     url = new java.net.URL("http://192.168.0.26:8086/defaultroot/upload/201012211525255316256830418.doc");

     urlCon = url.openConnection();

     String message = urlCon.getHeaderField(0);

     System.out.println(message);//文件存在打印‘HTTP/1.1 200 OK’ 文件不存在打印 ‘HTTP/1.1 404 Not Found’

 } catch (java.net.MalformedURLException e0) {

 } catch (java.io.IOException ie3) {

 }

 

优化代码

 public static boolean exists(String URLName) {
         try {
             HttpURLConnection.setFollowRedirects(false);
             HttpURLConnection con = (HttpURLConnection) new URL(URLName).openConnection();
             con.setRequestMethod("HEAD");
             return (con.getResponseCode() == HttpURLConnection.HTTP_OK);
         } catch (Exception e) {
             e.printStackTrace();
             return false;
         }
     }