如何从Json Node中提取特定的值？

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

public class JsonParsingExample {
    public static void main(String[] args) {
        String jsonString = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";

        try {
            // 解析Json字符串为JsonNode对象
            ObjectMapper objectMapper = new ObjectMapper();
            JsonNode jsonNode = objectMapper.readTree(jsonString);

            // 提取特定的值
            String name = jsonNode.get("name").asText();
            int age = jsonNode.get("age").asInt();
            String city = jsonNode.get("city").asText();

            // 打印提取的值
            System.out.println("Name: " + name);
            System.out.println("Age: " + age);
            System.out.println("City: " + city);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}