1.初学者例程：
OFBiz Tutorial - A Beginners Development Guide
https://cwiki.apache.org/confluence/display/OFBIZ/OFBiz+Tutorial+-+A+Beginners+Development+Guide
part1
part2
注意：在PracticeMenus.xml中，这里不能为main, 可以为mainA, 因为它与CommonMenus.xml里的main有些冲突:
<menu name="MainAppBar" title="PracticeApplication" extends="CommonAppBarMenu" extends-resource="component://common/widget/CommonMenus.xml"> <menu-item name="mainA" title="Main"><link target="main"/></menu-item> <menu-item name="person" title="Person"><link target="person"/></menu-item> </menu>
