php分层方式
php分层模式
此篇文字,写入5月1日,当时出于一些目的,学了php,在T字横线上发展了一下.
关于分层模式，最早学过C#，接触了三层架构，java中的MVC；java还有多层架构；在MVC之前有过model1,model2。今天想写写php，想照着java中的路子写，虽然都声称面向对象的语言，但是路数还是有差别。
分层的核心思想应该就是，解耦和，每层各司其职。
java中的多层架构：
数据持久层：DAO（data?access?object)或者还定义了一个IDAO接口；数据访问对象没有业务逻辑，针对每一张表或者说每一个实体的CRUD。框架有，dbutils(算不上框架,工具包)，hibernate，ibatis->myibatis等。
Model层，还有人叫实体entity还有人叫bean，虽然它可以是个bean,个人认为bean的概念并不准确，bean的概念更广。这一层贯穿与整个系统，DAO将表数据转移到model对象中。与model携带数据传递。这一层就是要面向对象.
Service层，业务逻辑层：负责系统逻辑，控制事务，等；调用DAO完成数据持久化。其中web?service，cxf，hessian便是与这层相关的技术。
web层，显示数据与用户交互；可以由servlet，jsp（jsp之后也会被编译成servelt)担当；使用struts的话web层可分Action层，分发用户请求调用Service层逻辑，分发处理结果数据到jsp，servlet。
php中,view层有模板来充当,模板的核心原理就是替换字符.一个月过去了,这php就和当年c#一样不敢谈了.但是拿过来php的代码我还是能看懂的.
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