使用JSON路径通过json对象更新json中的值

{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}

$.address.city

const json = {
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
};

json.address.city = "San Francisco";

console.log(json);

import json

json_str = '''
{
  "name": "John",
  "age": 30,
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}
'''

json_obj = json.loads(json_str)
json_obj["address"]["city"] = "San Francisco"

updated_json_str = json.dumps(json_obj)
print(updated_json_str)

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

public class JsonUpdateExample {
    public static void main(String[] args) throws Exception {
        String jsonStr = "{\"name\":\"John\",\"age\":30,\"address\":{\"street\":\"123 Main St\",\"city\":\"New York\"}}";
        ObjectMapper objectMapper = new ObjectMapper();
        JsonNode jsonNode = objectMapper.readTree(jsonStr);
        
        ((ObjectNode) jsonNode.get("address")).put("city", "San Francisco");
        
        String updatedJsonStr = objectMapper.writeValueAsString(jsonNode);
        System.out.println(updatedJsonStr);
    }
}