如何读取json

How to read json

本文关键字：json 读取 何读取      更新时间：2023-09-26

我有以下JSON对象:

{"feed":[
    {"news":
      {"adopted_from":null,"user_id":null,"description":"this is test","id":2}
   },
   {"news":
     {"adopted_from":null,"user_id":null,"description":"like unlike done","id":1}
    }
]}

我想检索新闻的id。我尝试了许多不同的方式(例如feed[0].news.id, feed.news.id, feed[[0].news.id])，但无法访问该值。谁能帮助我如何使用JavaScript访问它?

我从上面复制并粘贴了JSON，并尝试了以下操作，它工作得很好:


    var data = {"feed":[{"news":{"adopted_from":null,"user_id":null,"description":"this is test","id":2}},{"news":{"adopted_from":null,"user_id":null,"description":"like unlike done","id":1}}]};
    // alert the first news id
    alert(data.feed[0].news.id);

它按照预期从数组中获得第一个news对象的id。

这个适合我:

var f = {"feed":[{"news":{"adopted_from":null,"user_id":null,"description":"this is test","id":2}},{"news":{"adopted_from":null,"user_id":null,"description":"like unlike done","id":1}}]}
alert( f.feed[0].news.id )

var feed = json_decode(yourData)
for(var counter in feed) {
    console.log(feed[counter].news.id);
}
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