将json文件转换为字符串

const json = { "name": "John", "age": 30 };
const jsonString = JSON.stringify(json);
console.log(jsonString); // 输出：{"name":"John","age":30}

import json

json_data = { "name": "John", "age": 30 }
json_string = json.dumps(json_data)
print(json_string)  # 输出：{"name": "John", "age": 30}

import com.google.gson.Gson;

class Person {
    String name;
    int age;
}

Person person = new Person();
person.name = "John";
person.age = 30;

Gson gson = new Gson();
String jsonString = gson.toJson(person);
System.out.println(jsonString);  // 输出：{"name":"John","age":30}

$json_data = array("name" => "John", "age" => 30);
$json_string = json_encode($json_data);
echo $json_string;  // 输出：{"name":"John","age":30}