List与json的转换
/** * 根据页面用户输入的信息形成 Answer 对象的List * * @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;}/** * 将一个json字串转为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;}/** * * 将一个 Answer 对象的List 生成Json字串 * 是根据客户端页面用户输入的信息生成的 * * */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();}