Any serializable java class (implementing java.io.Serializable) that follows specific conventions: a no-argument constructor, and properties accessible via get/set/is accessors.
The idea is to make it predictable, so that properties etc can be discovered automatically through reflection - of great help in tool and framework development.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…