Json converting java

Question

I use Spring boot 2 default configuration to deserialize from json to object. Can it deserialize json if it has more key:value pair than java object? Like this:

json:

{
  "id": 2,
  "name": "Jane",
  "age": 21
}

Java class:

public class ClientResponse {
    private Long id;
    private String name;
}

Java object has not age property, but json has.

Does it convert correctly?

score 0 · Accepted Answer · answered Apr 22 '20 at 10:30

0

Yes. Just add the following annotation on your class:

@JsonIgnoreProperties({"age"})
public class ClientResponse {}

If you want to ignore any unknown properties:

@JsonIgnoreProperties(ignoreUnknown=true)

Reference info.

answered Apr 22 '20 at 10:30

Benoit

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Thanks a lot! And what if inverse? If in json has not key that have in java object? – qwerty Apr 22 '20 at 10:46
1

@qwerty Jackson works by creating an instance of your class and then copying properties. If you don't have it in JSON, it will stay the default (usually null). – chrylis -cautiouslyoptimistic- Apr 22 '20 at 10:47

Json converting java

1 Answers1