java - 如何解析从 Google 的图像搜索 API 返回的这个 JSON 字符串？

Question

我有一个 JSON 字符串:

{"responseData": {
 "results": [
  {
   "GsearchResultClass": "GimageSearch",
   "width": "450",
   "height": "450",
   "imageId": "Yt3TRC1vxzhazM",
   "tbWidth": "127",
   "tbHeight": "127",
   "unescapedUrl": "http://www.touchnote.com/files/assets/STAN009.jpg",
   "url": "http://www.touchnote.com/files/assets/STAN009.jpg",
   "visibleUrl": "www.touchnote.com",
   "title": "Touchnote - Personalised \u003cb\u003eFuzzy Monkey\u003c/b\u003e greeting cards design by Dan \u003cb\u003e...\u003c/b\u003e",
   "titleNoFormatting": "Touchnote - Personalised Fuzzy Monkey greeting cards design by Dan ...",
   "originalContextUrl": "http://www.touchnote.com/photo/card-design/Fuzzy+Monkey",
   "content": "Card Design \u003cb\u003eFuzzy Monkey\u003c/b\u003e",
   "contentNoFormatting": "Card Design Fuzzy Monkey",
   "tbUrl": "http://images.google.com/images?q\u003dtbn:Yt3TRC1vxzhazM:www.touchnote.com/files/assets/STAN009.jpg"
  },
  {
   "GsearchResultClass": "GimageSearch",
   "width": "640",
   "height": "480",
   "imageId": "c6093fGTdNvKOM",
   "tbWidth": "137",
   "tbHeight": "103",
   "unescapedUrl": "http://stuff.fuzzymonkeyphotography.com/front_page/NEW_NEW_logo3_480px.jpg",
   "url": "http://stuff.fuzzymonkeyphotography.com/front_page/NEW_NEW_logo3_480px.jpg",
   "visibleUrl": "www.fuzzymonkeyphotography.com",
   "title": "\u003cb\u003eFuzzy Monkey\u003c/b\u003e Photography",
   "titleNoFormatting": "Fuzzy Monkey Photography",
   "originalContextUrl": "http://www.fuzzymonkeyphotography.com/",
   "content": "Welcome to \u003cb\u003eFuzzy Monkey\u003c/b\u003e",
   "contentNoFormatting": "Welcome to Fuzzy Monkey",
   "tbUrl": "http://images.google.com/images?q\u003dtbn:c6093fGTdNvKOM:stuff.fuzzymonkeyphotography.com/front_page/NEW_NEW_logo3_480px.jpg"
  },
  {
   "GsearchResultClass": "GimageSearch",
   "width": "500",
   "height": "375",
   "imageId": "oKdBN2qxw5JJoM",
   "tbWidth": "130",
   "tbHeight": "98",
   "unescapedUrl": "http://farm2.static.flickr.com/1104/1434841504_edc671e65c.jpg?v\u003d0",
   "url": "http://farm2.static.flickr.com/1104/1434841504_edc671e65c.jpg%3Fv%3D0",
   "visibleUrl": "www.flickr.com",
   "title": "http://farm2.static.flickr.com/1104/1434841504_edc671e65c.jpg?v\u003d0",
   "titleNoFormatting": "http://farm2.static.flickr.com/1104/1434841504_edc671e65c.jpg?v\u003d0",
   "originalContextUrl": "http://www.flickr.com/photos/maryelizajade/1434841504/in/set-72157602146748073/",
   "content": "\u003cb\u003efuzzy monkey\u003c/b\u003e",
   "contentNoFormatting": "fuzzy monkey",
   "tbUrl": "http://images.google.com/images?q\u003dtbn:oKdBN2qxw5JJoM:farm2.static.flickr.com/1104/1434841504_edc671e65c.jpg%3Fv%3D0"
  },
  {
   "GsearchResultClass": "GimageSearch",
   "width": "500",
   "height": "375",
   "imageId": "GNgM5anX5NZYPM",
   "tbWidth": "130",
   "tbHeight": "98",
   "unescapedUrl": "http://farm1.static.flickr.com/38/91607831_009166aa41.jpg",
   "url": "http://farm1.static.flickr.com/38/91607831_009166aa41.jpg",
   "visibleUrl": "www.flickr.com",
   "title": "\u003cb\u003eFuzzy monkey\u003c/b\u003e sad face on Flickr - Photo Sharing!",
   "titleNoFormatting": "Fuzzy monkey sad face on Flickr - Photo Sharing!",
   "originalContextUrl": "http://www.flickr.com/photos/ajagendorf25/91607831/",
   "content": "\u003cb\u003eFuzzy monkey\u003c/b\u003e sad face",
   "contentNoFormatting": "Fuzzy monkey sad face",
   "tbUrl": "http://images.google.com/images?q\u003dtbn:GNgM5anX5NZYPM:farm1.static.flickr.com/38/91607831_009166aa41.jpg"
  }
 ],
 "cursor": {
  "pages": [
   {
    "start": "0",
    "label": 1
   },
   {
    "start": "4",
    "label": 2
   },
   {
    "start": "8",
    "label": 3
   },
   {
    "start": "12",
    "label": 4
   },
   {
    "start": "16",
    "label": 5
   },
   {
    "start": "20",
    "label": 6
   },
   {
    "start": "24",
    "label": 7
   },
   {
    "start": "28",
    "label": 8
   }
  ],
  "estimatedResultCount": "578000",
  "currentPageIndex": 0,
  "moreResultsUrl": "http://www.google.com/images?oe\u003dutf8\u0026ie\u003dutf8\u0026source\u003duds\u0026start\u003d0\u0026hl\u003den\u0026q\u003dfuzzy+monkey"
 }
}
, "responseDetails": null, "responseStatus": 200}

我收到了来自 Google image search API 的回复.但是当我尝试解析它时，我总是失败而没有结果:

JSONObject json = new JSONObject(builder.toString());

final JSONArray geodata = json.getJSONArray("results");
final int n = geodata.length();

for (int i = 0; i < n; ++i) {
    final JSONObject person = geodata.getJSONObject(i);
    System.out.println(person.geString("width"));
}

我做错了什么？

Answer 1

JSONObject json = new JSONObject(builder.toString());
//Add this line 
JSONObject responseData = json.getJSONObject("responseData");
final JSONArray geodata = responseData.getJSONArray("results");
final int n = geodata.length();

for (int i = 0; i < n; ++i) {
    final JSONObject person = geodata.getJSONObject(i);
    System.out.println(person.geString("width"));
}