there are dozens of scripts here on SSC for scripting out jobs:
http://www.sqlservercentral.com/search/?q=script+jobs&t=s
so from there you could then add a WHERE filter to any of those to limit to a specific database.
some jobs never explicitly mention a database name even thought hey fiddle with them...they might be querying sys.databases, or using dynamic sql to get database names, and run a loop / cursor thru the contents...so you need to take that into consideration as well.
Lowell