如何创建JSON格式的字典？

import json

# 创建一个字典
data = {
    "name": "John",
    "age": 30,
    "city": "New York"
}

# 将字典转换为JSON格式的字符串
json_data = json.dumps(data)

print(json_data)

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

import com.google.gson.Gson;

public class Main {
    public static void main(String[] args) {
        // 创建一个字典
        Person person = new Person("John", 30, "New York");

        // 创建Gson对象
        Gson gson = new Gson();

        // 将字典转换为JSON格式的字符串
        String json = gson.toJson(person);

        System.out.println(json);
    }
}

class Person {
    private String name;
    private int age;
    private String city;

    public Person(String name, int age, String city) {
        this.name = name;
        this.age = age;
        this.city = city;
    }
}

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

// 创建一个字典
var data = {
    name: "John",
    age: 30,
    city: "New York"
};

// 将字典转换为JSON格式的字符串
var json_data = JSON.stringify(data);

console.log(json_data);

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