基于注解的工厂方法 [英] annotation based factory methods

问题描述

我希望能够自动装配一个单例 bean (foo)

I want to be able to autowire a singleton bean (foo)

@Component
public class FooUser {

  @Autowire Foo foo;
}

由另一个单例方法创建 (FooFactory.createFoo)

created by another singleton's method (FooFactory.createFoo)

@Service
public class FooFactory {

  public Foo createFoo() {...}
}

对于xml，它只是factory-method.我如何使用注释来做到这一点?

with xml it's simply factory-method. How can i do it with annotation?

推荐答案

尝试 Java @Configuration 代替:

Try Java @Configuration instead:

@Configuration 
public class Config {

    @Bean
    public FooUser fooUser() {
        return new FooUser(foo());
    }

    @Bean
    public FooFactory fooFactory() {
        return new FooFactory();
    }

    @Bean
    public Foo foo() {
        return fooFactory().createFoo();
    }

}

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