如何在Java中将一个JSON字符串拆分成两个JSON对象

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

public class JsonSplitExample {
    public static void main(String[] args) throws Exception {
        String jsonString = "{\"user\":{\"name\":\"John\", \"age\":30}, \"order\":{\"id\":123, \"amount\":100.0}}";

        ObjectMapper objectMapper = new ObjectMapper();
        JsonNode rootNode = objectMapper.readTree(jsonString);

        // 提取user部分
        JsonNode userNode = rootNode.get("user");
        String userJson = objectMapper.writeValueAsString(userNode);
        System.out.println("User JSON: " + userJson);

        // 提取order部分
        JsonNode orderNode = rootNode.get("order");
        String orderJson = objectMapper.writeValueAsString(orderNode);
        System.out.println("Order JSON: " + orderJson);
    }
}