如何在JSON Array - JAVA中根据最近的datetime过滤数据？

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.*;

public class JsonFilterExample {
    public static void main(String[] args) {
        String jsonString = "[{\"id\":1,\"name\":\"John\",\"datetime\":\"2022-09-01T10:30:00Z\"},{\"id\":2,\"name\":\"Amy\",\"datetime\":\"2022-09-02T15:45:00Z\"},{\"id\":3,\"name\":\"Tom\",\"datetime\":\"2022-09-03T09:20:00Z\"}]";
        ObjectMapper objectMapper = new ObjectMapper();

        try {
            // 解析JSON为JsonNode对象
            JsonNode jsonNode = objectMapper.readTree(jsonString);

            // 将JsonNode转换为List<Map<String, Object>>对象
            List<Map<String, Object>> dataList = new ArrayList<>();
            Iterator<JsonNode> iterator = jsonNode.iterator();
            while (iterator.hasNext()) {
                JsonNode node = iterator.next();
                Map<String, Object> data = objectMapper.convertValue(node, Map.class);
                dataList.add(data);
            }

            // 按照datetime字段进行降序排序
            Collections.sort(dataList, (data1, data2) -> {
                SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
                try {
                    Date date1 = format.parse((String) data1.get("datetime"));
                    Date date2 = format.parse((String) data2.get("datetime"));
                    return date2.compareTo(date1);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return 0;
            });

            // 目标最近datetime
            Date targetDatetime = new Date();

            // 查找第一个大于或等于目标最近datetime的元素位置
            int index = -1;
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
            for (int i = 0; i < dataList.size(); i++) {
                try {
                    Date datetime = format.parse((String) dataList.get(i).get("datetime"));
                    if (datetime.compareTo(targetDatetime) >= 0) {
                        index = i;
                        break;
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            // 根据位置截取子数组
            List<Map<String, Object>> filteredList = dataList.subList(index, dataList.size());

            // 输出过滤后的结果
            for (Map<String, Object> data : filteredList) {
                System.out.println(data);
            }

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}