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spring:annotation @Primary @Qualifier

admin 11月 12, 2020 0 

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public class  {

private MovieCatalog[] movieCatalogs;

}

public class  {
private Set<MovieCatalog> movieCatalogs;

public void setMovieCatalogs(Set<MovieCatalog> movieCatalogs) {
this.movieCatalogs = movieCatalogs;
}

}

public class  {
private Map<String, MovieCatalog> movieCatalogs;

public void setMovieCatalogs(Map<String, MovieCatalog> movieCatalogs) {
this.movieCatalogs = movieCatalogs;
 }
}

自动引入容器中的对象

You can also use @Autowired for interfaces that are well-known resolvable dependencies: BeanFactory , ApplicationContext , Environment , ResourceLoader ,
ApplicationEventPublisher , and MessageSource . These interfaces and their extended interfaces,such as ConfigurableApplicationContext or ResourcePatternResolver , are automatically resolved, with no special setup necessary

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public class  {

private ApplicationContext context;
public () {
}

}

@Primary

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@Configuration
public class MovieConfiguration {
@Bean
@Primary   //如果只需要注入一个bean,这个优先注入
public MovieCatalog firstMovieCatalog() { ... }
@Bean
public MovieCatalog secondMovieCatalog() { ... }

}

@Qualifier

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