将JSON解组到map中

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>>() {});

            // 遍历map并输出键值对
            for (Map.Entry<String, Object> entry : map.entrySet()) {
                System.out.println(entry.getKey() + ": " + entry.getValue());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}