Why I must do this operations?
I want use default db? isn't it Hypersonic?
Create a new empty database schema instance called 'alfresco' in MySQL - use the example files in the Alfresco bundle in /extra/databases/mysql to perform this with the correct user permissions.
Download the MySQL JDBC driver file from MySQL
Extract the MySQL JDBC driver .jar file and copy to \jboss\server\default\lib