Question

给定spring java-config with method返回bean列表：

@Configuration
public class Config {

    @Bean(name = "resultConsumers")
    public List<Consumer> getConsumers() {
        return Arrays.asList(...);
    }
}

如何将其注入另一个bean？

class Bean {

   @Inject
   what?
}

P.S。它不是具有不同消费者实现的列表，它们都是同一类的实例。

Answer 1

当您使用Collection注释@Autowired类型时，Spring不会查找该类型的相应bean。相反，它会查找Collection要存储的组件类型。

相反，请将@Resource与bean名称一起使用。

@Resource(name ="resultConsumers")
private List<Consumer> consumers;

Answer 2

You should not create the @Bean as a list. Simply add all of your Consumer objects as individual beans. Autowire a field as a List of Consumers, and Spring will find all of your Consumer beans and create the List for you...

@Configuration
public class Config {

    @Bean
    public Consumer consumer1() {
        return new Consumer();
    }

    @Bean
    public Consumer consumer2() {
        return new Consumer();
    }
}
...
class Bean {

    //  Contains consumer1 and consumer2
    @Inject
    private List<Consumer> consumers;
 }

Answer 3

<?php
  $n = ( isset($_GET['n']) ? $_GET['n'] : "");
  echo $n;
?>

注射就像这样

    @Configuration
public class Config {

    @Bean
    public List<Consumer> getConsumers() {
        return Arrays.asList(...);
    }
}

这就是全部。

如何使用Spring Java配置注入几个bean？

3 个答案: