三种常用JSON解析性能比较

今天用了三种三方包来解析JSON文件并试验了其性能：

JSON文件（测试用）：
private static String json = "{\"id\":1,\"title\":\"德国黑森林罕见暴雨把路面冲走\",\n" +
            "    \"questions\":[\n" +
            "        {\"sequence\":1,\"title\":\"你是那个?\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":2,\"title\":\"德国黑森林罕见暴雨把路面冲走\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":3,\"title\":\"德国黑森林罕见暴雨把路面冲走\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":4,\"title\":\"你是那个\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":5,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":6,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":7,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":8,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":9,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":10,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":11,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":12,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":13,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":14,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":15,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":16,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":17,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":18,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":19,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]},\n" +
            "        {\"sequence\":20,\"title\":\"美海豚伤痕累累疑曾遭虎鲸整只吞食\",\"answers\":[{\"result\":\"A:姓名\"},{\"result\":\"B:六哈\"},{\"result\":\"C:积分\"},{\"result\":\"D:金佛额\"}]}\n" +
            "        ]\n" +
            "}" ;

1 - json-20070829.jar（不知道从网上那里来的），执行时间11s-12s
public void testParseJsonWith_org_json_jar() throws Exception {
        long start = System.currentTimeMillis();

        for (int loop = 0; loop < 10000; loop++) {

            ExaminationDTO examinationDTO = new ExaminationDTO();
            JSONObject jExamination = new JSONObject(json);

            //handle examination info
            int id = jExamination.optInt("id");
            String title = jExamination.optString("title");
            examinationDTO.setId(id);
            examinationDTO.setTitle(title);

            //hanle question
            JSONArray jQuestions = jExamination.getJSONArray("questions");
            for (int i = 0; i < jQuestions.length(); i++) {
                JSONObject jQuestion = jQuestions.getJSONObject(i);
                int sequence = jQuestion.optInt("sequence");
                String questionTitle = jQuestion.optString("title");
                QuestionDTO questionDTO = new QuestionDTO();
                questionDTO.setSequence(sequence);
                questionDTO.setTitle(questionTitle);

                //handle answer
                JSONArray jAnswers = jQuestion.getJSONArray("answers");
                for (int j = 0; j < jAnswers.length(); j++) {
                    JSONObject jAnswer = jAnswers.getJSONObject(j);
                    String result = jAnswer.optString("result");
                    String[] tokens = StringUtils.delimitedListToStringArray(result, ":");
                    AnswerDTO answerDTO = new AnswerDTO();
                    answerDTO.setSequence(tokens[0]);
                    answerDTO.setResult(tokens[1]);
                    questionDTO.addAnswer(answerDTO);
                }

                examinationDTO.addQuestion(questionDTO);
            }
        }

        long end = System.currentTimeMillis();
        long during = end - start;
        System.out.println("10000 times taken time for org.json is " + during);
    }

2 - alibaba fastjson-1.1.34.android.jar,执行时间8s-9s
public void testParseJsonWith_fast_json_jar() throws Exception {
        long start = System.currentTimeMillis();

        for (int loop = 0; loop < 10000; loop++) {

            ExaminationDTO examinationDTO = new ExaminationDTO();
            JSONObject jExamination = JSON.parseObject(json);

            //handle examination info
            int id = jExamination.getInteger("id");
            String title = jExamination.getString("title");
            examinationDTO.setId(id);
            examinationDTO.setTitle(title);

            //hanle question
            JSONArray jQuestions = jExamination.getJSONArray("questions");
            for (int i = 0; i < jQuestions.size(); i++) {
                JSONObject jQuestion = jQuestions.getJSONObject(i);
                int sequence = jQuestion.getInteger("sequence");
                String questionTitle = jQuestion.getString("title");
                QuestionDTO questionDTO = new QuestionDTO();
                questionDTO.setSequence(sequence);
                questionDTO.setTitle(questionTitle);

                //handle answer
                JSONArray jAnswers = jQuestion.getJSONArray("answers");
                for (int j = 0; j < jAnswers.size(); j++) {
                    JSONObject jAnswer = jAnswers.getJSONObject(j);
                    String result = jAnswer.getString("result");
                    String[] tokens = StringUtils.delimitedListToStringArray(result, ":");
                    AnswerDTO answerDTO = new AnswerDTO();
                    answerDTO.setSequence(tokens[0]);
                    answerDTO.setResult(tokens[1]);
                    questionDTO.addAnswer(answerDTO);
                }

                examinationDTO.addQuestion(questionDTO);
            }
        }

        long end = System.currentTimeMillis();
        long during = end - start;
        System.out.println("10000 times taken time for alibaba fast json is " + during);
    }

3 - jackson-all-1.9.11.jar, 执行时间15s-17s
public void testParseJsonWith_jackson_jar() throws Exception {
        long start = System.currentTimeMillis();

        for (int loop = 0; loop < 10000; loop++) {
            ObjectMapper objectMapper = new ObjectMapper();

            ExaminationDTO examinationDTO = new ExaminationDTO();
            JsonNode jExamination = objectMapper.readTree(json);

            //handle examination info
            int id = jExamination.get("id").getIntValue();
            String title = jExamination.get("title").getTextValue();
            examinationDTO.setId(id);
            examinationDTO.setTitle(title);

            //hanle question
            ArrayNode jQuestions = (ArrayNode) jExamination.get("questions");
            for (int i = 0; i < jQuestions.size(); i++) {
                JsonNode jQuestion = jQuestions.get(i);
                int sequence = jQuestion.get("sequence").getIntValue();
                String questionTitle = jQuestion.get("title").getTextValue();
                QuestionDTO questionDTO = new QuestionDTO();
                questionDTO.setSequence(sequence);
                questionDTO.setTitle(questionTitle);

                //handle answer
                ArrayNode jAnswers = (ArrayNode) jQuestion.get("answers");
                for (int j = 0; j < jAnswers.size(); j++) {
                    JsonNode jAnswer = jAnswers.get(j);
                    String result = jAnswer.get("result").getTextValue();
                    String[] tokens = StringUtils.delimitedListToStringArray(result, ":");
                    AnswerDTO answerDTO = new AnswerDTO();
                    answerDTO.setSequence(tokens[0]);
                    answerDTO.setResult(tokens[1]);
                    questionDTO.addAnswer(answerDTO);
                }

                examinationDTO.addQuestion(questionDTO);
            }
        }

        long end = System.currentTimeMillis();
        long during = end - start;
        System.out.println("10000 times taken time for jackson is " + during);

    }