if(!UtilMethods.isSet(assetRealPath)){
assetDir = FileUtil.getRealPath(assetPath);
}else{
assetDir = assetRealPath;
}
FileUtil.copyDirectory(assetDir, backupTempFilePath + File.separator + "asset", new AssetFileNameFilter());
//do not ship the license.
String f = backupTempFilePath + File.separator + "asset" + File.separator + "license";
FileUtil.deltree(f);