Spring Annotations annotion--2017.08.27

1 The role of annotations in spring

The premise is that in the XML configuration file

<context:compoent-scan base-package= "cn.itcast" ></context:compoent-scan> annotations Auto-scan   file is Base-package

　　

I now understand the role of a configuration XML. We don't need to configure it in XML anymore.

In simple terms, it is a generalization of three types

Above the class: @ Component value=

@ Controller: Control Layer value=

@ Serivice: Service Layer value=

@ Repository: Persistent layer value=

Above the properties: @Autowired

@Resource name=

Spring Annotations annotion--2017.08.27