XML configuration and autowired blending in spring

1. Mixing of classes:

Configuration in the configuration file:

<bean id= "A" class= "COM.AB.CC.A"/>

Configuration in a class

@Autowired

A;

The benefits of this can be reduced Get/set method

[email protected] and @resource the difference

Autowired By default is automatically assembled according to Bytype, so there are multiple types of XML or annotation of a class when the error, you can add @qualifier annotations, specify the name. This is spring comes with, when the frame, to spring;

@Autowired
@Qualifier ("Userserviceimpl")
Public Iuserservice UserService;

Or

@Autowired
public void Setuserdao (@Qualifier ("Userdao") Userdao Userdao) {
This.userdao = Userdao;
}

Resource by default is automatically assembled according to the byname, this is the Java comes with, when changing the frame, do not need spring.

@Resource

Private car car;

3. In the XML configuration file, the previous <context:component-scan/> configuration will be overwritten by the <bean id= ""/> Configuration in the following case, if there is the same configuration

XML configuration and autowired blending in spring