Apex controller from the Lightning Component Wrapper Classes blog post

AccountController.cls

public with sharing class AccountController 
{
	@AuraEnabled
	public static List<Account> GetAccountNames()
	{
		return [select id, Name from Account limit 10];
	}    
	
	@AuraEnabled 
	public static List<Account> GetAccountDetails(String idListJSONStr)
	{
		System.debug('idListJSON = ' + idListJSONStr);
		Type idArrType=Type.forName('List<Id>');
		List<Id> ids=(List<Id>) JSON.deserialize(idListJSONStr, idArrType);
		System.debug('Ids = ' + ids);
		
		return [select id, Name, Industry, Website from Account where id in :ids];
	}
}