Spring 引导注释@ConfigurationProperties无法正常工作 Kotlin 中嵌套集合的类

Question

有一个带有@ConfigurationProperties和@ConstructorBinding的数据类。此类包含作为集合的字段。有几个属性源(application.yml、application-dev1.yml(初始化集合的第一个元素。此元素的绑定无法正常工作。草签的值仅从一个属性源中提取。所需的beahavior与某个嵌套类类型的字段相同：合并所有属性源的值。

Kotlin属性类

@ConfigurationProperties("tpp.test.root")
@ConstructorBinding
data class RootPropperties(
var rootField1: String = "",
var rootField2: String = "",
var nested: NestedProperties = NestedProperties(),
var nestedList: List<NestedListProperties> = listOf()
) {
data class NestedProperties(
var nestedField1: String = "",
var nestedField2: String = ""
)
@ConstructorBinding
data class NestedListProperties(
var nestedListField1: String = "",
var nestedListField2: String = ""
)
}

application.yml

tpp:
test:
root:
root-field1: default
nested:
nested-field1: default
nested-list:
- nested-list-field1: default

应用程序-dev1.yml

tpp:
test:
root:
root-field2: dev1
nested:
nested-field2: dev1
nested-list:
- nested-list-field2: dev1

测试

@ActiveProfiles("dev1")
@SpringBootTest
internal class ConfigurationPropertiesTest {
@Autowired
lateinit var environment: Environment
@Autowired
lateinit var rootPropperties: RootPropperties
@Test
fun `configuration properties binding`() {
Assertions.assertEquals("default", rootPropperties.rootField1)
Assertions.assertEquals("dev1", rootPropperties.rootField2)
Assertions.assertEquals("default", rootPropperties.nested.nestedField1)
Assertions.assertEquals("dev1", rootPropperties.nested.nestedField2)
Assertions.assertTrue(rootPropperties.nestedList.isNotEmpty())
//org.opentest4j.AssertionFailedError:
//Expected :default
//Actual   :
Assertions.assertEquals("default", rootPropperties.nestedList[0].nestedListField1)
Assertions.assertEquals("dev1", rootPropperties.nestedList[0].nestedListField2)
}
@Test
fun `environment binding`() {
Assertions.assertEquals("default", environment.getProperty("tpp.test.root.root-field1"))
Assertions.assertEquals("dev1", environment.getProperty("tpp.test.root.root-field2"))
Assertions.assertEquals("default", environment.getProperty("tpp.test.root.nested.nested-field1"))
Assertions.assertEquals("dev1", environment.getProperty("tpp.test.root.nested.nested-field2"))
Assertions.assertEquals("default", environment.getProperty("tpp.test.root.nested-list[0].nested-list-field1"))
Assertions.assertEquals("dev1", environment.getProperty("tpp.test.root.nested-list[0].nested-list-field2"))
}
}

对assertEquals("默认"，RootProperties.nestedList[0]。nestedListField1(使用RootProperties进行的测试失败，因为RootProperties。nestedList[0]。nested ListField1的值为空。所有其他断言测试都成功通过。绑定不能仅针对集合正常工作。

同时，环境测试成功通过。Environment.getProperty("tpp.test.root.nested list[0].nested-list-field1"(解析更正后的值：；默认"。

春季启动版本：2.6.4

Answer 1

包含在参考文档的本节中

可能的解决方法是将"列表"切换为"映射"。

属性类

@ConfigurationProperties("tpp.test.root-map")
@ConstructorBinding
data class RootMapPropperties(
var rootField1: String = "",
var rootField2: String = "",
var nested: NestedProperties = NestedProperties(),
var nestedMap: Map<String, NestedMapProperties> = mapOf()
) {
data class NestedProperties(
var nestedField1: String = "",
var nestedField2: String = ""
)
data class NestedMapProperties(
var nestedMapField1: String = "",
var nestedMapField2: String = ""
)
}

application.yml

tpp:
test:    
root-map:
root-field1: default
nested:
nested-field1: default
nested-map:
1:
nested-map-field1: default

应用程序-dev1.yml

tpp:    
root-map:
root-field2: dev1
nested:
nested-field2: dev1
nested-map:
1:
nested-map-field2: dev1

测试

@ActiveProfiles("dev1")
@SpringBootTest
internal class ConfigurationPropertiesMapTest {
@Autowired
lateinit var environment: Environment
@Autowired
lateinit var rootPropperties: RootMapPropperties
@Test
fun `configuration properties binding`() {
Assertions.assertEquals("default", rootPropperties.rootField1)
Assertions.assertEquals("dev1", rootPropperties.rootField2)
Assertions.assertEquals("default", rootPropperties.nested.nestedField1)
Assertions.assertEquals("dev1", rootPropperties.nested.nestedField2)
Assertions.assertTrue(rootPropperties.nestedMap.isNotEmpty())
Assertions.assertEquals("default", rootPropperties.nestedMap["1"]!!.nestedMapField1)
Assertions.assertEquals("dev1", rootPropperties.nestedMap["1"]!!.nestedMapField2)
}
}