HarmonyOS API12是否有json解析工具

API 12提供JSON解析与生成的接口。具体请参考：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-json-V5

参考下列demo：

let jsonStr = '{"code":"200","msg":"登录成功","data":{"name":"test","id":"123"}}';
let JSONObject: ESObject = JSON.parse(jsonStr);
console.log('JSONObject.code::::' + JSONObject.code)
console.log('JSONObject.msg::::' + JSONObject.msg)
console.log('JSONObject.data.nam::::' + JSONObject.data.name)