I am newbie in jBPM and I heard jBPM does not have a GUI function. If it is true, is there any tool the overcome the disadvantage? for example, software or plug-in which is able to be integrated with jBPM, and to output JSP?
Lack of Gui function??? Without wanting to sound rude, but did you read anything at all yourself about jBPM? It has a Graphical designer, a webconsole and various jsf components.... so....