在前端：
1.如果json是List對(duì)象轉(zhuǎn)換的，可以直接遍歷json，讀取數(shù)據(jù)。
2.如果是需要把前端的List對(duì)象轉(zhuǎn)換為json傳到后臺(tái)，param是ajax的參數(shù)，那么轉(zhuǎn)換如下所示：
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var jsonStr = JSON.stringify(list); var param= {}; param.jsonStr=jsonStr; |
在后臺(tái)：
1.把String轉(zhuǎn)換為L(zhǎng)ist(str轉(zhuǎn)換為list)
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List<T> list = new ArrayList<T>(); JSONArray jsonArray = JSONArray.fromObject(str);//把String轉(zhuǎn)換為json list = JSONArray.toList(jsonArray,t);//這里的t是Class<T> |
2.把List轉(zhuǎn)換為json
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JSONArray json = JSONArray.fromObject(object); String str = json.toString();//把json轉(zhuǎn)換為String |
eg:
1. 根據(jù)頁(yè)面用戶輸入的信息形成 Answer 對(duì)象的List
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/** * @param answers * @param question_ids * @param types * @return */ private List<Answer> toAnswerList(String[] studenAnswers, int[] question_ids, int[] types,int[] scores) { List<Answer> answerList = new ArrayList<Answer>(); if(studenAnswers!=null && question_ids!= null && types!= null&& scores!= null){ for (int i = 0; i < studenAnswers.length; i++) { Answer answer = new Answer(); String studenAnswer = studenAnswers[i]; int type = types[i]; int question_id = question_ids[i]; int score = scores[i]; answer.setQuestion_id(question_id); answer.setScore(score); answer.setStudenAnswer(studenAnswer); answer.setType(type); answerList.add(answer); } } return answerList; } /** * 將一個(gè)json字串轉(zhuǎn)為list * @param props * @return */ public static List<Answer> converAnswerFormString(String answer){ if (answer == null || answer.equals("")) return new ArrayList(); JSONArray jsonArray = JSONArray.fromObject(answer); List<Answer> list = (List) JSONArray.toCollection(jsonArray, Answer.class); return list; } |
2. 將一個(gè) Answer 對(duì)象的List 生成Json字串，是根據(jù)客戶端頁(yè)面用戶輸入的信息生成的
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public String getAnswerString(String[] studenAnswers, int[] question_ids, int[] types,int[] scores) { List list = toAnswerList(studenAnswers, question_ids, types, scores); JSONArray jsonarray = JSONArray.fromObject(list); return jsonarray.toString(); } |
