java - 解析 JSON 对象中的 JSON 对象

Question

我有一个 JSON 文件，其中包含项目对象数组:

{
  "item": [
    {
      "title": "TitleA",
      "link": "http://www.abc.html?partner=rss&emc=rss",
      "guid": {
        "-isPermaLink": "true",
        "#text": "www.abc.html"
      },
      "atom:link": {
        "-rel": "standout",
        "-href": "http://www.abc.html?partner=rss&emc=rss"
      },
      "media:content": {
        "-url": "standard.jpg",
        "-medium": "image",
        "-height": "75",
        "-width": "75"
      },
      "media:description": "This is the description.",
      "media:credit": "Reuters",
      "description": "In depth description",
      "dc:creator": "By test creator",
      "pubDate": "Sun, 21 Oct 2012 11:29:12 GMT",
      "category": "World"

    },
    {
      "title": "TitleB",
      "link": "http://www.abc.html?partner=rss&emc=rss",
      "guid": {
        "-isPermaLink": "true",
        "#text": "www.abc.html"
      },
      "atom:link": {
        "-rel": "standout",
        "-href": "http://www.abc.html?partner=rss&emc=rss"
      },
      "media:content": {
        "-url": "standard.jpg",
        "-medium": "image",
        "-height": "75",
        "-width": "75"
      },
      "media:description": "This is the description.",
      "media:credit": "Reuters",
      "description": "In depth description",
      "dc:creator": "By test creator",
      "pubDate": "Sun, 21 Oct 2012 11:29:12 GMT",
      "category": "World"

    }
    ]
}

现在我知道如何获取“标题”，但我不知道如何访问“media:content”中的“-url”，因为它似乎是 Item 对象中的 JSON 对象。我如何获取该值并将其分配给我的 Item 类中的值？

Answer 1

尝试从当前json字符串中获取“media:content”内的“-url”:

JSONObject jsonObject = new JSONObject("Your JSON STRING HERE");

JSONArray  jsonArray =jsonObject.getJSONArray("item");

 for (int i = 0; i < jsonArray.length(); i++) {
    JSONObject jsonObjectitem=
                           jsonArray.getJSONObject(i);                                                                            

  // get title or link here
     String strtitle=jsonObjectitem.getString("title");
      //....get other values in same way 

   // get media:content json object
  JSONObject jsonObjectmediacontent = 
                       jsonObjectitem.getJSONObject("media:content");

   // get url,medium,...

     String strurl=jsonObjectmediacontent.getString("-url"); 
     //....get other values in same way                                   
 }