Reference: http://www.activiti.org/userguide/#apiDebuggingUnitTest
1.Set a break point in the code
2."Display", type the below, highlight and right-click "Display" org.h2.tools.Server.createWebServer("-web").start()
3.visit http://localhost:8082/ in a browser, fill in the JDBC URL to the in-memory database (by default this is jdbc:h2:mem:activiti), and hit the connect button