如何通过以下方式创建JSON结构

{
  "name": "John",
  "age": 30,
  "city": "New York"
}

import json

data = {
  "name": "John",
  "age": 30,
  "city": "New York"
}

json_data = json.dumps(data)
print(json_data)

var data = {
  "name": "John",
  "age": 30,
  "city": "New York"
};

var json_data = JSON.stringify(data);
console.log(json_data);

import org.json.JSONObject;

JSONObject data = new JSONObject();
data.put("name", "John");
data.put("age", 30);
data.put("city", "New York");

String json_data = data.toString();
System.out.println(json_data);