如何将JSON对象转换为相应的字符串

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

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

import json

json_dict = { "name": "John", "age": 30, "city": "New York" }
json_string = json.dumps(json_dict)
print(json_string)

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

import com.fasterxml.jackson.databind.ObjectMapper;

ObjectMapper objectMapper = new ObjectMapper();
Map<String, Object> jsonMap = new HashMap<>();
jsonMap.put("name", "John");
jsonMap.put("age", 30);
jsonMap.put("city", "New York");

String jsonString = objectMapper.writeValueAsString(jsonMap);
System.out.println(jsonString);

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