可以自由地选择操作系统和 web 服务器。同时，还可以在开发时选择使用面对过程和面对对象，或者两者混和的方式来开发。(Free to choose the operating system and web server.At the same time, and you can also choose to use when in the development process and in the face of the object, or both mixing way of develo