javakotlin&springboot我有一个MyBatis映射器，我正在“猴子补丁”一个方法，并且需要一个自动连接的bean

Question

我在Kotlin中有一个接口，它是MyBatis映射器：

@Mapper
interface EquipmentSupportMapper {
    // @Autowired lateinit var metaMapper: MetaMapper // <- Does not work... How?
    @SelectProvider(type = SqlProviderAdapter::class, method = "select")
    fun findMany(selectStatement: SelectStatementProvider?): List<Equipment>
}

然后，我在其中添加了一个方法实现：

fun EquipmentSupportMapper.searchEquipment(
    textSearchValue: String? = null, facilities: Array<Int>? = null,
    manufacturers: Array<Int>? = null, equipmentExample: Equipment? = null
):
        List<Equipment> {
    val builder = SqlBuilder.select(equipmentColumnList)
        .from(EquipmentSupport.EquipmentTable)
        .where()
...
return someList;

现在，在我的方法searchEquipment中，我需要@Autowire一个名为MetaMapper的Springbean

我不能只是补充：

接口中的@Autowired lateinit var metaMapper: MetaMapper，因为它会给出错误。我该怎么做

Answer 1

事实证明我能做到：

@Mapper
@Qualifier("IESM")
interface InterfaceEquipmentSupportMapper {
    // @Autowired lateinit var metaMapper: MetaMapper // <- Does not work... How?
    @SelectProvider(type = SqlProviderAdapter::class, method = "select")
    fun findMany(selectStatement: SelectStatementProvider?): List<Equipment>
}

@Service
@Qualifier("EquipmentSupportMapper")
class EquipmentSupportMapper(
    @Autowired @Qualifier("IFSM") ifsm: InterfaceEquipmentSupportMapper,
    @Autowired metaMapper: MetaMapper
  ): InterfaceEquipmentSupportMapper by ifsm

诀窍是在Spring为其创建实现的接口上创建一个限定符，然后通过委托给自动连接的Spring创建的bean，将其注入实现同一接口的类中

然后，我没有在我的应用程序中使用名为IESM的Mapper，而是用限定符EquipmentSupportMapper自动连线，得到了正确的一个

下面是一个测试示例：

@SpringBootTest
class EquipmentSupportMapperTest {
    @Autowired
    @Qualifier("EquipmentSupportMapper")
    lateinit var mapper: EquipmentSupportMapper