java中调用web中的jsp或servlet去通知它们做一些操作，这里可以返回远程流（参考：下载远程文件例子），

或者仅仅通知，如下

 

try

        {

            String url = "";

            URL portalUrl = new URL(url);

            HttpURLConnection urlConnection = (HttpURLConnection)portalUrl.openConnection();

            urlConnection.setRequestMethod("POST");

            urlConnection.connect();

            urlConnection.getInputStream();

            System.out.println("notice mywebto reread config!");

        }

        catch (Exception e)

        {

            e.printStackTrace();

        }