jackson json序列化list- of -list特定属性值

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

import java.util.ArrayList;
import java.util.List;

public class JacksonSerializationExample {
    public static void main(String[] args) {
        // 创建一个包含List of List的Java对象
        List<List<String>> listOfList = new ArrayList<>();
        List<String> list1 = new ArrayList<>();
        list1.add("value1");
        list1.add("value2");
        List<String> list2 = new ArrayList<>();
        list2.add("value3");
        list2.add("value4");
        listOfList.add(list1);
        listOfList.add(list2);

        try {
            // 创建ObjectMapper对象
            ObjectMapper objectMapper = new ObjectMapper();

            // 将Java对象转换为JSON字符串
            String json = objectMapper.writeValueAsString(listOfList);

            // 解析JSON字符串
            JsonNode jsonNode = objectMapper.readTree(json);

            // 提取特定属性值
            List<List<String>> extractedList = new ArrayList<>();
            for (JsonNode node : jsonNode) {
                List<String> extractedInnerList = new ArrayList<>();
                for (JsonNode innerNode : node) {
                    extractedInnerList.add(innerNode.asText());
                }
                extractedList.add(extractedInnerList);
            }

            // 打印提取的属性值
            for (List<String> innerList : extractedList) {
                for (String value : innerList) {
                    System.out.println(value);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}