Spring Boot 2.0.0中的@Value注入会注入null

Question

So. After reading the official docs and finding nothing wrong with what I am doing, I just ran out of ideas.

My application.properties:

vz.info.version=0.2.8

My properties Component

import lombok.Getter;
import lombok.Setter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;

@Configuration
public class VZProperties {

  @Value("${vz.info.version}")
  @Getter
  @Setter
  private String apiVersion;

}

I am getting null all over the place for the apiVersion . And Lombok does not seem to be the issue. What did I miss from the docs?

EDIT

I would like to call it like this:

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.Lists;
import lombok.Getter;

import java.io.Serializable;
import java.util.List;

public class VZNFCTagResponse implements Serializable{

  private static final long serialVersionUID = -2824767225275894898L;

  @Autowired
  private VZProperties properties;

  public VZNFCTagResponse(List<VZNFCTagAction> tagList){
    this.tags = tagList;
  }

  /*...*/

  @JsonProperty
  public String apiVersion(){
    return this.properties.getApiVersion();
  }      
}  

And after having checked to get it running via injecting Environment, the property isn't there, either.

Answer 1

Your class VZNFCTagResponse is not registered as Spring Beans. Annotate it as @Component and use DI for inject him.

Answer 2

The only way to avoid making it into a component and still benefit from DI is to mark it @Configurable and enable load-time weaving. Can't you just inject it into the component that creates VZNFCTagResponse and pass the version as a constructor parameter?