Spring Boot使用bean內部配置

Question

@Configuration
@AutoConfigureOrder()
@ComponentScan("scanPath")
public class AutoConfiguration {    

    @Autowired
    private Factory   factory;

    @Bean("factory")
    @ConditionalOnProperty(prefix = "application.middleware", name = "enabled", havingValue = "true")
    public Factory getFactory() {
        return new Factory();
    }

    @Bean("binding")
    @DependsOn("factory")
    public Binding getMarketingDataSource() {
        return factory.getInstance("bindingName");
    }
}    

我想：1.初始化bean工廠（如果找不到值，可以為null）2.自動綁定並由bean綁定使用

但是現在我得到了例外

Caused by: org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'factory': Requested bean is currently in creation: Is there an unresolvable circular reference?

所以我想要在綁定中使用工廠，如何制作？ 謝謝！

Answer 1

使用getFactory()獲取Bean（並刪除@Autowired ）：

public Binding getMarketingDataSource() {
    return getFactory().getInstance("bindingName");

Answer 2

將工廠連接到簽名中，現在Spring看到綁定需要工廠並為您設置它：

@Bean("binding")
public Binding getMarketingDataSource(Factory factory) {
  return factory.getInstance("bindingName");
}