架构设计，相关选择

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JAVA  Projects:
Project 1:
    Project Summary:This project is a e-government system.It is designed by me.This system have three layer structure. As follow.



   Action Layer:
 This layer of the mian work is to accept request and forward.Do not do the business processing.
 Packaging request parameters and send to Servicce Layer. Service Layer give back parameters for the Action Layer to mix View and Model send to customer.
 This layer use Model POJO OBJECT

Service Layer:
 This layer of the work is to do business processing.
 Check messages of parameters
 Transaction Processing
 Packaging service parameters then send to Dao Layer
 Trsanform Domain Pojo Object To Model Pojo Object

Dao Layer:
 This layer supply the Service Layer with database operation method.So this layer always has very short method.
 This layer use Domain POJO OBJECT

Project framework:
As Follow.




Project Module division: