如何在JAVA中忽略NullNode进行反序列化

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.NullNode;

public class JsonDeserializer {
    public static void main(String[] args) {
        String json = "{\"name\":\"John\", \"age\":null}";

        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.configOverride(JsonNode.class).setNullHandling(JsonNode.NullNode.class);

        try {
            JsonNode rootNode = objectMapper.readTree(json);
            String name = rootNode.get("name").asText();
            Integer age = rootNode.get("age").asInt();

            System.out.println("Name: " + name);
            System.out.println("Age: " + age);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}