为什么在java中不能提取Json数组？

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

public class JsonArrayExample {
    public static void main(String[] args) {
        String json = "[{\"name\":\"John\",\"age\":30},{\"name\":\"Jane\",\"age\":25}]";

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            JsonNode jsonArray = objectMapper.readTree(json);

            if (jsonArray.isArray()) {
                for (JsonNode jsonNode : jsonArray) {
                    String name = jsonNode.get("name").asText();
                    int age = jsonNode.get("age").asInt();
                    System.out.println("Name: " + name + ", Age: " + age);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Name: John, Age: 30
Name: Jane, Age: 25