我有這個 Google 圖書 JSON 文本要解析： "volumeInfo": { "title": "Year Book", "subtitle": "The Annual Supplement to the World Book Encyclopedia : the 1989 World Book : a Review of the Events of 1988", "authors": [ "World Book Encyclopedia" ], "publishedDate": "1989", "industryIdentifiers": [ { "type": "ISBN_10", "identifier": "0716604892" }, { "type": "ISBN_13", "identifier": "9780716604891" } ], "readingModes": { "text": false, "image": false }, "pageCount": 608, "printType": "BOOK", "categories": [ "Encyclopedias and dictionaries" ], "maturityRating": "NOT_MATURE", "allowAnonLogging": false, "contentVersion": "0.1.1.0.preview.0", "panelizationSummary": { "containsEpubBubbles": false, "containsImageBubbles": false }, "imageLinks": { "smallThumbnail": "http://books.google.com/books/content?id=SDFIuwEACAAJ&printsec=frontcover&img=1&zoom=5&source=gbs_api", "thumbnail": "http://books.google.com/books/content?id=SDFIuwEACAAJ&printsec=frontcover&img=1&zoom=1&source=gbs_api" }, "language": "en", "previewLink": "http://books.google.it/books?id=SDFIuwEACAAJ&dq=isbn:0716604892&hl=&cd=2&source=gbs_api", "infoLink": "http://books.google.it/books?id=SDFIuwEACAAJ&dq=isbn:0716604892&hl=&source=gbs_api", "canonicalVolumeLink": "https://books.google.com/books/about/Year_Book.html?hl=&id=SDFIuwEACAAJ" }深入地說，我需要抓住這一點： "industryIdentifiers": [ { "type": "ISBN_10", "identifier": "0716604892" }, { "type": "ISBN_13", "identifier": "9780716604891" } ]
3 回答
一只名叫tom的貓
TA貢獻1906條經(jīng)驗 獲得超3個贊
industryIdentifiers是一個對象數(shù)組，因此您首先調(diào)用getJSONArray(String name)以獲取數(shù)組，然后調(diào)用getJSONObject(int index)以獲取對象。
你的代碼應該是：
JSONArray industryIdentifiers = volumeInfo.getJSONArray("industryIdentifiers");
if (industryIdentifiers.length() == 1) {
? ? JSONObject obj = industryIdentifiers.getJSONObject(0);
? ? ISBN = obj.getString("type") + ": " + obj.getString("identifier");
} else if (industryIdentifiers.length() == 2) {
? ? JSONObject obj1 = industryIdentifiers.getJSONObject(0);
? ? JSONObject obj2 = industryIdentifiers.getJSONObject(1);
? ? ISBN = obj1.getString("type") + ": " + obj1.getString("identifier") + " - "
? ? ? ? ?+ obj2.getString("type") + ": " + obj2.getString("identifier");
}
精慕HU
TA貢獻1845條經(jīng)驗 獲得超8個贊
合并兩個答案，滿足我的需求的完美工作解決方案：
//ISBN
String ISBN = "";
if(volumeInfo.toString().contains("industryIdentifiers")) {
JSONArray industryIdentifiers = volumeInfo.getJSONArray("industryIdentifiers");
if (industryIdentifiers.length() > 0) {
for(int counter = 0; counter < industryIdentifiers.length(); counter++){
JSONObject obj = industryIdentifiers.getJSONObject(counter);
ISBN = ISBN + obj.getString("type") + ": " + obj.getString("identifier") + " ";
}
}
}
else{ISBN = "null";}
狐的傳說
TA貢獻1804條經(jīng)驗 獲得超3個贊
這是我將采取的方法：
if(volumeInfo.toString().contains("industryIdentifiers")) {
JSONArray industryIdentifiers = volumeInfo.getJSONArray("industryIdentifiers");
if(industryIdentifiers != null && industryIdentifiers.length > 0) {
for(int i = 0; i < industryIdentifiers.length; i++) {
JSONObject industryIdentifier = industryIdentifiers.getJSONObject(i);
// Get the ISBN info from the current identifier and concatenate it to your ISBN string
}
} else {
ISBN = "null";
}
添加回答
舉報
0/150
提交
取消