Jackson将JSON解析为Java Map

import com.fasterxml.jackson.databind.ObjectMapper;

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

        try {
            ObjectMapper objectMapper = new ObjectMapper();
            Map<String, Object> map = objectMapper.readValue(json, new TypeReference<Map<String, Object>>() {});

            // 访问解析后的数据
            String name = (String) map.get("name");
            int age = (int) map.get("age");
            String city = (String) map.get("city");

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