ContextConnection的子类FileConnection,HttpConnection

FileConnection fc = null;
        //Connector.open(String  name,int mode):name是连接文件URL,以file:///开头,mode访问方式
      try {
fc = (FileConnection) Connector.open(mCUShopCommonDir, Connector.READ_WRITE);
if (!fc.exists()) {
    //fc.setWritable(true);
    fc.mkdir();
}
                            //记住，一定要关
fc.close();
} catch (Exception e1) {
e1.printStackTrace();
}





InputStream input = null;
        try {
            //这里的URL是以http://开头的
            http = (HttpConnection) Connector.open(URL);
            http.setRequestProperty("x-up-calling-line-id", "1358188000");
            http.setRequestMethod(HttpConnection.GET);


            /* Getting the response code will open the connection */
            int rc = http.getResponseCode();
            if (rc == HttpConnection.HTTP_OK) {
                String type = http.getType();
                TraceControler.TraceOut("XMLProductDownload: getInputStream: http type: " + type);
                mSavePath += getFileNameExt(type);
                input = http.openInputStream();
            } else {
                TraceControler.TraceOut("XMLProductDownload: getInputStream: HTTP NOT OK: " + rc);
            }
        } catch (IOException ex) {
            ex.printStackTrace();
            mMidlet.showWaiting("网络错误");

            return null;
        }