ObjectMapper操作Json对象

实体类
public class Roots {

    private int rid = 11;
    private String name = "root";
    private List<Items> items;
	// Getter And Setter ....
}

public class Items {

    private int id = 1;
    private String name = "qq";

    public Items(int id, String name) {
        this.id = id;
        this.name = name;
    }
// Getter And Setter ...

测试代码
@Test
    public void testObjectMapper() throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        Roots roots = new Roots();
        Items items1 = new Items(2,"2");
        Items items2 = new Items(3,"3");
        List<Items> list = new ArrayList<>();
        list.add(items1); list.add(items2);
        roots.setItems(list);

        String json = JsonUtils.convertObjectToJson(roots);
        System.out.println(json);
        JsonNode jsonNode = objectMapper.readTree(json);
        Iterator<Map.Entry<String, JsonNode>> fields = jsonNode.fields();
        while (fields.hasNext()){
            Map.Entry<String, JsonNode> next = fields.next();
            if (next.getKey().equals("items")) {
                JsonNode value = next.getValue();
                if (value.isArray()) {
                    System.out.println(value.get(0).get("name"));
                }
            }

        }
    }

最终打印结果:
{“rid”:11,“name”:“root”,“items”:[{“id”:2,“name”:“2”},{“id”:3,“name”:“3”}]}
“2”

根据我自己的条件最终获取到了 数组中的 name属性的值