w3c course
struts2 very good MVC framework
Traditional java object for action execute No longer coupled with servlet View technology AOP Extensible Ajax
Request response model: IE ----- servlet ---- call model/java bean ---- forward jsp --- generate response
The difference between mvc thinking and observer pattern
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action -- the model
interceptors --- Interceptors
valueStatck ------------ Provides a common route link-other component integration
rest , view
- Controller dispatches servlet filters and interceptors via struts2
- Models are implemented through actions
- A view is a combination of result type and result
The life cycle
- The user issues a resource request to the service
- The core controller determines the action after viewing the request
- Configure the interceptor function using the verification file, etc.
- perform the selected action
- Configure interceptor post-processing
- View display results
WEB.XML is a J2EE configuration file
BS Architecture
controller ------------browser -------------------view
dispatcherFilter |
Interceptors |
| |
model /action ------------------------------------- jsp
The return string of the no-parameter method must be a POJO
interceptor = servlet filter = JDK proxy class
Cross-cutting: Process before calling action, and catch exception after calling action
result type
A value stack is a set of objects