在Jackson中反序列化JSON属性

Question

I have a JSON file as such:

{
    "id1" : {
       ...
    },
    "id2" : {
       ...
    }
}

I am using mapper.readerForUpdating(object).readValue(jsonFile) and want the reader to read only the data corresponding to the id that object 's class has provided in an annotation. Is there a way to annotate object 's class with "id1" or something so that mapper will only read values from "id1"?

Answer 1

I can think of one simple solution if your id1 is static. Create a wrapper class which contains one getter (and setter) corresponding to the field you want and ignore all the other properties as follows:

@JsonProperty("id1")
public MyBean getCustomId()
{
     ...
}

@JsonProperty("id1")
public void setCustomId()
{
     ...
}

Second option would be to use @JsonSerialize and @JsonDeserialize annotations and write your customized logic.