遍历json对象并更新Json对象中的多个值的Java代码

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

public class JsonUpdater {
    public static void main(String[] args) {
        String jsonString = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}";

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

            // 将JSON字符串解析为JsonNode对象
            JsonNode jsonNode = objectMapper.readTree(jsonString);

            // 更新JSON对象中的多个值
            ((ObjectNode) jsonNode).put("name", "Tom");
            ((ObjectNode) jsonNode).put("age", 25);
            ((ObjectNode) jsonNode).put("city", "London");

            // 将更新后的JsonNode对象转换为JSON字符串
            String updatedJsonString = objectMapper.writeValueAsString(jsonNode);

            System.out.println(updatedJsonString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}