05 sping註解開發 Import

2.4 匯入乙個importbeandefinitionregistrar

增加乙個study.wyy.spring.anno.other.config.otherconfig配置類

@configuration

public
class
otherconfig
}

@configuration

@componentscan
(value =
)public
class
mainconfig
@test
(expected= nosuchbeandefinitionexception.
class
)public
void
testotherconfig()

在mainconfig使用@import註解匯入即可

*

/@configuration
@componentscan
(value =
)@import
(otherconfig.
class
)public
class
mainconfig
@test
public
void
testimportotherconfig()

@target

(elementtype.type)
@retention
(retentionpolicy.runtime)
@documented
public @inte***ce
import
, , 
* or regular component classes to import.
*/class<
?>
value()
;}

2.3.1 importselector介紹

public

inte***ce
importselector
of the importing @ class.
*/string[
]selectimports
(annotationmetadata importingclassmetadata)
;}

使用importselector匯入otherconfig

public

class
myimportselector
implements
importselector;}
}

@configuration

@componentscan
(value =
)@import
(myimportselector.
class
)public
class
mainconfig
class.
* note that types may not be
* registered here, due to lifecycle constraints related to 
* class processing.
* @param importingclassmetadata annotation metadata of the importing class
* @param registry current bean definition registry
*/public
void
registerbeandefinitions
( annotationmetadata importingclassmetadata, beandefinitionregistry registry)
;}

實現importbeandefinitionregistrar介面

public

class
myimportbeandefinitionregistrar
implements
importbeandefinitionregistrar
}

@configuration

@componentscan
(value =
)@import
(value = myimportbeandefinitionregistrar.
class
)public
class
mainconfig
{

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