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嗨我試圖用Json Simple來選擇「cheese」條目,但是當我嘗試選擇它時,我似乎返回「null」。將優秀的有關於如何做到這一點一些建議`JsonSimple:如何獲得Json Feed中的第二個對象
這裏是JSON的示例:
String s="[\"coins\",{\"wallet\":{\"shoppinglist\":{\"cheese\":{\"ingrediants\":[\"milk\",{\"preservative1\":\"wax\"}]}}}}]";
這裏是代碼:
System.out.println(s);
System.out.println("=======decode=======");
Object obj=JSONValue.parse(s);
JSONArray array=(JSONArray)obj;
System.out.println("======the 2nd element of array======");
System.out.println(array.get(1));
System.out.println();
System.out.println("======the 1st element of array======");
System.out.println(array.get(0));
System.out.println();
JSONObject obj2=(JSONObject)array.get(1);
System.out.println("======field \"1\"==========");
System.out.println(obj2.get("wallet"));
JSONObject obj3=(JSONObject) obj2.get("shoppinglist");
System.out.println("======field \"2\"==========");
System.out.println(obj3); //This figure is returning null when I would like it to return the json object shopping list
目前,它輸出:
["coins",{"wallet":{"shoppinglist":{"cheese":{"ingrediants":["milk",{"preservative1":"wax"}]}}}}] =======decode======= ======the 2nd element of array====== {"wallet":{"shoppinglist":{"cheese":{"ingrediants":["milk",{"preservative1":"wax"}]}}}} ======the 1st element of array====== coins ======field "1"========== {"shoppinglist":{"cheese":{"ingrediants":["milk",{"preservative1":"wax"}]}}} ======field "2"========== null
這會教我一個教訓爲:努力成爲一個智者,在我system.outs做工作,不具有良好的名字命名我的變量。學過的知識! - 謝謝! – 2012-02-04 18:32:03