MySQL database backup every day using java code
This is easy to do.


Write a script to create the backup using the "mysqldump" tool available at http://dev.mysql.com/doc/refman/5.1/en/mysqldump.html - Google "mysql backup unix/windows script" to find some examples.
Use a task scheduler to run this script. On UNIX this could be "cron", Windows as a "task scheduler". Best to do so at times when the app is under low-usage.


It is worth while putting some backup file cycling into the script so that you keep, say, every backup from the last week and delete the rest.

Also remember to backup to a physically different disk from the database itself so you have a backup if the disk dies.