Is there a way to call method after contractor after deserializion

问题

I deserialize a json and want then to call postProcess method by annotation or another way after constractor?

json file:

{
  "type": "storeType",
  "name": "store-name",
  "list": [
    {
      "type": "itemType",
      "name": "item1-name",
    },
    {
      "type": "itemType",
      "name": "item2-name",
    }
  ]
}

Store.class:

 Store extends AbstractClass{

    @Value("${store.size:100000}")
    private Integer size;
    @Autowired
    private StorePersistency persistency;

    private String name;
    private List<abstractClass> list;

    public Store(@JsonProperty("name") String name, @JsonProperty("list") list) {
        this.name=name;
        this.list=list;
    }

   @Override
   public postProcess(){
     ...
   }
}

Item.class:

 Item extends AbstractClass{

    private String name;

    public Store(@JsonProperty("name") String name) {
        this.name=name;
    }

   @Override
   public postProcess(){
     ...
   }
}

deserializerService:

AbstractClass clzz = objectMapper.readValue(jsonFile, AbstractClass.class)

The purpose is to @authowire and @value other class fields (StorePersistency and size) by calling a authowireService in postProcess method.

AuthowireService:

public void authowireBean(Class clzz){
   applicationContext.getAutowireCapableBeanFactory().autowireBeanProperties(clzz, AutowireCapableBeanFactory.AUTOWIRE_BY_TYPE, true);
}

回答1:

You should definitely decouple POJO from persistence and service layers. For persistence layer you could use DAO pattern which is probably represented by StorePersistency class in your case. You need to create service layer which implement postProcess. See Responsibilities and use of Service and DAO Layers for more info. Example service layer in your case could look like below:

@Component
class StoreService {

    @Value("${store.size:100000}")
    private Integer size;

    @Autowired
    private StorePersistency persistency;

    public postProcess(Store store) {
       ...
    }
}

来源：https://stackoverflow.com/questions/57753753/is-there-a-way-to-call-method-after-contractor-after-deserializion