/**
* 加载授权文件key
*/
Node xnKey = (Node) xpath.evaluate("Secure/Key", serviceNode, XPathConstants.NODE);
config.SecureKey = new KeyProfile(xnKey);
NodeList xnServers = (NodeList) xpath.evaluate("Loadbalance/Server/add", serviceNode, XPathConstants.NODESET);
if(xnServers == null || xnServers.getLength() == 0){
printExceprion(3,serviceName);
}