工厂模式是我们最常用的模式了,著名的Jive论坛 ,就大量使用了工厂模式，工厂模式在Java程序系统可以说是随处可见。 -The factory pattern is the most common mode, known as the Jive forum, and extensive use of the factory pattern, are the factory pattern in the Java programming system can be said to be seen