如何安装com.mysql.jdbc.Driver“无法找到带有类名的驱动程序：com.mysql.jdbc.Driver”？

I am setting up Atlassian Confluence and when it comes to choosing the database I stuck when I choose "use external Mysql DB" I saw some tutorials, but for me it didnt work out the way it should work. I use ubuntu 12.04 Server and have mysql installed. Now I tried to run confluence with an external database and I need this connector driver to make it work.I am setting up Atlassian Confluence and when i