Using Jackson ObjectMapper with Java 8 Optional values

Question

I was trying to use Jackson to write a class value to JSON that has Optional as fields:

public class Test {
    Optional field = Optional.of(\"         


        

Answer 1

Similar to @Manikandan's answer but add @JsonProperty to the private field instead of a getter so you don't expose your work around on the public api.

public class Test {

    @JsonProperty("field")
    private String field;

    @JsonIgnore
    public Optional<String> getField() {
        return Optional.of(field); // or Optional.ofNullable(field);
    }
}