如何限制Spring按包名筛选注入List中的Bean？

我在Spring中注入了List<ImplementMe>，对应的Bean还包含其他参数。所有ImplementMe的实现类原本处于同一包中，但该List所在的包可能不同，同时也存在不同包下的ImplementMe实现类。想了解是否能在@Bean方法中强制Spring仅注入指定子包下的Bean？我知道可以设置注入顺序，但未找到相关过滤方法，是否可以借助@Conditional注解来实现该需求？

简化后的现有实现 #

package com.example.demo

import org.springframework.boot.CommandLineRunner
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
import org.springframework.context.ApplicationContext
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.stereotype.Component


interface ImplementMe

@Component
class One : ImplementMe

@Component
class Two : ImplementMe

@Component
class Three : ImplementMe

class InjectInMe (val listOfImplementation : List<ImplementMe>)

@Configuration
class ConfigExample {
    @Bean
    fun example(listOfImplementation: List<ImplementMe> ) : InjectInMe {
        println(listOfImplementation)
        return InjectInMe(listOfImplementation)
    }
}

@SpringBootApplication
class DemoApplication(private val applicationContext: ApplicationContext) {
    @Bean
    fun run() = CommandLineRunner {
        println(applicationContext.getBean(InjectInMe::class.java))
    }
}

fun main(args: Array<String>) {
    runApplication<DemoApplication>(*args)
}

使用ObjectProvider实现注入后过滤的示例 #

package com.example.demo

import org.springframework.beans.factory.ObjectProvider
import org.springframework.beans.factory.annotation.Qualifier
import org.springframework.boot.CommandLineRunner
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
import org.springframework.context.ApplicationContext
import org.springframework.context.annotation.*
import org.springframework.stereotype.Component

interface ImplementMe

@Component
@Qualifier("pkg1")
class One : ImplementMe

@Component
@Qualifier("pkg2")
class Two : ImplementMe

@Component
@Qualifier("pkg2")
class Three : ImplementMe

class InjectInMe (val listOfImplementation : List<ImplementMe>)

@Configuration
class ConfigExample {
    @Bean
    @Qualifier("pkg2")
    fun example1(listOfImplementation: List<ImplementMe> ) : InjectInMe {
        return InjectInMe(listOfImplementation)
    }

    @Bean
    fun example2(listOfImplementation: ObjectProvider<ImplementMe> ) : InjectInMe {
        return InjectInMe(listOfImplementation.filter {
            // 此处模拟按包过滤
            it.javaClass.name.startsWith("com.example.demo.T")
        })
    }
}

@SpringBootApplication
class DemoApplication(private val applicationContext: ApplicationContext) {
    @Bean
    fun run() = CommandLineRunner {
        with(applicationContext.getBean("example1") as InjectInMe) { println(listOfImplementation) }
        println()
        with(applicationContext.getBean("example2") as InjectInMe) { println(listOfImplementation) }
    }
}

fun main(args: Array<String>) {
    runApplication<DemoApplication>(*args)
}

输出结果 #

[com.example.demo.One@63b3ee82, com.example.demo.Three@2620e717, com.example.demo.Two@7c8d5312]

[com.example.demo.Three@2620e717, com.example.demo.Two@7c8d5312]

内容的提问来源于stack exchange，提问作者Romano Silva