注释类型 Lazy
@Target({TYPE,METHOD,CONSTRUCTOR,PARAMETER,FIELD}) @Retention(RUNTIME) @Documented public @interface Lazy
Indicates whether a bean is to be lazily initialized.May be used on any class directly or indirectly annotated with
@Component
or on methods annotated with@Bean
.If this annotation is not present on a
@Component
or@Bean
definition, eager initialization will occur. If present and set totrue
, the@Bean
or@Component
will not be initialized until referenced by another bean or explicitly retrieved from the enclosingBeanFactory
. If present and set tofalse
, the bean will be instantiated on startup by bean factories that perform eager initialization of singletons.If Lazy is present on a
@Configuration
class, this indicates that all@Bean
methods within that@Configuration
should be lazily initialized. If@Lazy
is present and false on a@Bean
method within a@Lazy
-annotated@Configuration
class, this indicates overriding the 'default lazy' behavior and that the bean should be eagerly initialized.In addition to its role for component initialization, this annotation may also be placed on injection points marked with
Autowired
orInject
: In that context, it leads to the creation of a lazy-resolution proxy for all affected dependencies, as an alternative to usingObjectFactory
orProvider
.- 从以下版本开始:
- 3.0
- 作者:
- Chris Beams, Juergen Hoeller
- 另请参阅:
Primary
,Bean
,Configuration
,Component
可选元素概要
可选元素 修饰符和类型 可选元素 说明 boolean
value
Whether lazy initialization should occur.
元素详细资料
value
boolean value
Whether lazy initialization should occur.- 默认值:
- true