How to bind the same prefix with multiple properties class - spring

Question

Assume that there is a yaml configuration:
foo:
a:
b:
c:
d:
Generally, you will create an object like this:
#Data
#Validated
#Component
#ConfigurationProperties(prefix = "foo")
public class FooProperties {
#NotBlank
private String a;
// b c and d
}
But for the consideration of the project structure, I need to divide them into multiple objects in different packages, And they will use the same prefix.
package one:
#Data
#Validated
#Component
#ConfigurationProperties(prefix = "foo")
public class AProperties {
// only a property
#NotBlank
private String a;
}
package two:
#Data
#Validated
#Component
#ConfigurationProperties(prefix = "foo")
public class BProperties {
// only b property
#NotBlank
private String b;
}
...
And now, when my project fetch config from config server, Spring will say:
***************************
APPLICATION FAILED TO START
***************************
Binding to target [Bindable#2b32cd10 type = AProperties, value = 'provided', annotations = array<Annotation>[#org.springframework.boot.context.properties.ConfigurationProperties(ignoreInvalidFields=false, ignoreUnknownFields=false, prefix=foo, value=foo), #org.springframework.validation.annotation.Validated(value={})]] failed:
Property: foo.b
Value: someValue
Origin: "foo.b" from property source "bootstrapProperties-xxx"
Reason: The elements [foo.b] were left unbound.
So, How can I bind the same prefix with multiple properties class? Thx~