@ComponentScan-自动扫描组件

@ComponentScan

• 扫描com.spring包下面的所有组件

@ComponentScan(value="com.spring")
           

• 扫描com.spring下的所有组件，排除@Service注解的组件

@ComponentScan(value = "com.spring",
		excludeFilters = {@ComponentScan.Filter(type = ANNOTATION,classes = {Service.class})}
)
           

type = ANNOTATION

，按注解类型过滤，为默认类型，可以不写

excludeFilters = Filter[] ：指定扫描的时候按照什么规则排除那些组件

• 扫描com.spring下的所有组件，只包含@Controller注解的组件

@ComponentScan(value = "com.spring",
		includeFilters = {@ComponentScan.Filter(type = ANNOTATION,classes = {Controller.class})},
		useDefaultFilters = false
)
           

useDefaultFilters = false 关闭默认扫描包

includeFilters = Filter[] ：指定扫描的时候只需要包含哪些组件

• 配置多个扫描组件

@ComponentScans({
		@ComponentScan(value = "com.spring",
				includeFilters = {@ComponentScan.Filter(classes = {Controller.class})},
				useDefaultFilters = false
		),
		@ComponentScan(value = "com.spring",
				excludeFilters = {@ComponentScan.Filter(classes = {Service.class})})
})
           

jdk1.8以后可以重复写@ComponentScans组件：

@ComponentScan(value = "com.spring",
		includeFilters = {@ComponentScan.Filter(classes = {Controller.class})},
		useDefaultFilters = false
)
@ComponentScan(value = "com.spring",
		excludeFilters = {@ComponentScan.Filter(classes = {Service.class})}
)

           

• 只扫描@Controller注解和Person 类型

@ComponentScan(value = "com.spring",
		includeFilters = {
			@ComponentScan.Filter(type = ANNOTATION,classes = {Controller.class}),
			@ComponentScan.Filter(type = ASSIGNABLE_TYPE ,classes = {Person.class})
		},
		useDefaultFilters = false
)
           

type = ASSIGNABLE_TYPE

按指定类型过滤