Jackson反序列化:即使JSON属性为空，如何获取默认值

public class MyObject {
    private String name;

    @JsonSetter(defaultValue = "defaultName")
    public void setName(String name) {
        this.name = name;
    }
}

public class MyObject {
    private String name;

    @JsonDeserialize(using = MyStringDeserializer.class)
    public void setName(String name) {
        this.name = name;
    }
}

public class MyStringDeserializer extends StdDeserializer<String> {
    public MyStringDeserializer() {
        super(String.class);
    }

    @Override
    public String deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
        String value = p.getValueAsString();
        if (value == null || value.isEmpty()) {
            return "defaultName";
        }
        return value;
    }
}

@JsonInclude(JsonInclude.Include.NON_NULL)
public class MyObject {
    private String name;

    // Getter and setter methods
}