String vCenterUserName ="administrator";		String vCenterPassword = "_SKYC123!";		String vCenterAddress = "172.16.211.38";				ServiceInstance si = new ServiceInstance(new URL("https://"+vCenterAddress+"/sdk"), vCenterUserName, vCenterPassword, true);		//查询名称为Test-datacenter 的数据中心		String datacenterName = "Test-datacenter";		Datacenter dcObj = (Datacenter) new InventoryNavigator(si.getRootFolder()).searchManagedEntity("Datacenter", datacenterName);		//查询所有数据中心		ManagedEntity []dcObjs =  new InventoryNavigator(si.getRootFolder()).searchManagedEntities("Datacenter");		//在datacenter下查询对应名称为Test-cluster的集群		String clusterName ="Test-cluster";		ClusterComputeResource clusterObj =(ClusterComputeResource) new InventoryNavigator(dcObj).searchManagedEntity("ClusterComputeResource", clusterName );				String hostname ="172.16.201.11";		//查询单个物理机器		HostSystem host =(HostSystem) new InventoryNavigator(clusterObj).searchManagedEntity("HostSystem", hostname );