java 判断url路径下文件是否存在

/**
* 判断文件是否存在
* @param httpPath
* @return
*/
private static Boolean existHttpPath(String httpPath){
URL httpurl = null;
try {
httpurl = new URL(new URI(httpPath).toASCIIString());
URLConnection urlConnection = httpurl.openConnection();
// urlConnection.getInputStream();
Long TotalSize=Long.parseLong(urlConnection.getHeaderField("Content-Length"));
if (TotalSize <= 0){
return false;
}
return true;
} catch (Exception e) {
logger.debug(httpurl + "文件不存在");
return false;
}
}