json解析之fastjson和jackson使用对比

前言

最近项目中需要做埋点分析，首先就需要对埋点日志进行解析处理，刚好这时候体验对比了下fastjson和jackson两者使用的区别，以下分别是针对同一个json串处理，最终的效果都是将json数据解析出来，并统一展示。

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一、fastjson简介？

fastjson是由国内的阿里推出的一种json处理器，由java语言编写，无依赖，不需要引用额外的jar包，能直接运行在jdk环境中，它的解析速度是非常之快的，目前超过了所有json库。
提示：以下是引用fastjson的方法，数据未涉及到私密信息

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonProcessingException;public class FastJsonTest {public static void main(String[] args) throws JsonProcessingException {String json = "{\n" +"    \"distinct_id\": \"77\",\n" +"    \"identities\":\n" +"    {\n" +"        \"$identity_mp_id\": \"37\",\n" +"        \"$identity_login_id\": \"77\",\n" +"        \"$identity_mp_wx17a032a586c19379_openid\": \"oiF\",\n" +"        \"$identity_anonymous_id\": \"oiF\"\n" +"    },\n" +"    \"lib\":\n" +"    {\n" +"        \"$lib\": \"MiniProgram\",\n" +"        \"$lib_method\": \"code\",\n" +"        \"$lib_version\": \"1.17.7\"\n" +"    },\n" +"    \"properties\":\n" +"    {\n" +"        \"$lib\": \"MiniProgram\",\n" +"        \"$lib_version\": \"1.17.7\",\n" +"        \"$network_type\": \"WIFI\",\n" +"        \"$brand\": \"IPHONE\",\n" +"        \"$manufacturer\": \"iPhone\",\n" +"        \"$model\": \"iPhone 12 Pro Max<iPhone13,4>\",\n" +"        \"$screen_width\": 428,\n" +"        \"$screen_height\": 926,\n" +"        \"$os\": \"iOS\",\n" +"        \"$os_version\": \"14.2.1\",\n" +"        \"$mp_client_app_version\": \"8.0.44\",\n" +"        \"$mp_client_basic_library_version\": \"3.2.5\",\n" +"        \"$timezone_offset\": -480,\n" +"        \"$app_id\": \"wx17a039\",\n" +"        \"$app_version\": \"1.3\",\n" +"        \"platform_type\": \"小程序\",\n" +"        \"product_name\": \"小程序\",\n" +"        \"member_flag\": false,\n" +"        \"member_level\": \"非会员\",\n" +"        \"$latest_scene\": \"wx-10\",\n" +"        \"$scene\": \"wx-10\",\n" +"        \"$url_path\": \"pages/Common/Url/index\",\n" +"        \"$title\": \"照明\",\n" +"        \"$url_query\": \"\",\n" +"        \"$referrer\": \"pages/Common/Url/index\",\n" +"        \"$referrer_title\": \"照明\",\n" +"        \"$url\": \"pages/Common/Url/index\",\n" +"        \"$is_first_day\": false,\n" +"        \"$ip\": \"11.11.11.11\",\n" +"        \"$browser\": \"WeChat\",\n" +"        \"$browser_version\": \"8\",\n" +"        \"$track_signup_original_id\": \"oiF\",\n" +"        \"$is_login_id\": true,\n" +"        \"$ad_extra_properties\": \"{\\\"sdf_channel_closed\\\":false}\",\n" +"        \"$city\": \"上海\",\n" +"        \"$province\": \"上海\",\n" +"        \"$country\": \"中国\"\n" +"    },\n" +"    \"login_id\": \"77\",\n" +"    \"anonymous_id\": \"oiF\",\n" +"    \"type\": \"track\",\n" +"    \"event\": \"$MPShow\",\n" +"    \"_track_id\": 5692,\n" +"    \"time\": 1703,\n" +"    \"_flush_time\": 17032,\n" +"    \"device_id\": \"oiFOU\",\n" +"    \"project_id\": 2,\n" +"    \"map_id\": \"oiFOU\",\n" +"    \"user_id\": -4011,\n" +"    \"recv_time\": 1703,\n" +"    \"extractor\":\n" +"    {\n" +"        \"f\": \"sdf_input_topic\",\n" +"        \"o\": 379,\n" +"        \"n\": \"sdf_input_topic\",\n" +"        \"s\": 379,\n" +"        \"c\": 379,\n" +"        \"p\": 1,\n" +"        \"e\": \"hyb\"\n" +"    },\n" +"    \"edge_progress\":\n" +"    {\n" +"        \"f\": \"(dev=821,ino=537178209)\",\n" +"        \"n\": \"access_log.2023122213\",\n" +"        \"o\": 1400687,\n" +"        \"s\": 37229603,\n" +"        \"c\": 37229604,\n" +"        \"e\": \"hybr\"\n" +"    },\n" +"    \"project\": \"test\",\n" +"    \"ver\": 2\n" +"}";JSONObject jsonObject = JSON.parseObject(json);new FastJsonTest().travelJSONObject(jsonObject);}public void travelJSONObject(JSONObject originalJSONObject) {for (String key : originalJSONObject.keySet()) {    StringBuilder path = new StringBuilder(key);Object value = originalJSONObject.get(key);if (value instanceof String || value instanceof Number || value instanceof Boolean) {System.out.println(key + " : " + value);continue;}if (value instanceof JSONObject) {JSONObject object = (JSONObject) value;travelJSONObject(object);}}}
}

二、jackson简介

jackson是用来序列化和反序列化json的java开源框架，社区相对比较活跃，更新速度较快，是最流行的json解析器之一，也是Spring MVC默认json解析器。
提示：以下是引用jackson的方法，数据未涉及到私密信息

import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.core.JsonProcessingException;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.JsonNode;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.ObjectMapper;
import java.util.Iterator;public class JacksonTest {public static void main(String[] args) throws JsonProcessingException {String json = "{\n" +"    \"distinct_id\": \"77\",\n" +"    \"identities\":\n" +"    {\n" +"        \"$identity_mp_id\": \"37\",\n" +"        \"$identity_login_id\": \"77\",\n" +"        \"$identity_mp_wx17a032a586c19379_openid\": \"oiF\",\n" +"        \"$identity_anonymous_id\": \"oiF\"\n" +"    },\n" +"    \"lib\":\n" +"    {\n" +"        \"$lib\": \"MiniProgram\",\n" +"        \"$lib_method\": \"code\",\n" +"        \"$lib_version\": \"1.17.7\"\n" +"    },\n" +"    \"properties\":\n" +"    {\n" +"        \"$lib\": \"MiniProgram\",\n" +"        \"$lib_version\": \"1.17.7\",\n" +"        \"$network_type\": \"WIFI\",\n" +"        \"$brand\": \"IPHONE\",\n" +"        \"$manufacturer\": \"iPhone\",\n" +"        \"$model\": \"iPhone 12 Pro Max<iPhone13,4>\",\n" +"        \"$screen_width\": 428,\n" +"        \"$screen_height\": 926,\n" +"        \"$os\": \"iOS\",\n" +"        \"$os_version\": \"14.2.1\",\n" +"        \"$mp_client_app_version\": \"8.0.44\",\n" +"        \"$mp_client_basic_library_version\": \"3.2.5\",\n" +"        \"$timezone_offset\": -480,\n" +"        \"$app_id\": \"wx17a039\",\n" +"        \"$app_version\": \"1.3\",\n" +"        \"platform_type\": \"小程序\",\n" +"        \"product_name\": \"小程序\",\n" +"        \"member_flag\": false,\n" +"        \"member_level\": \"非会员\",\n" +"        \"$latest_scene\": \"wx-10\",\n" +"        \"$scene\": \"wx-10\",\n" +"        \"$url_path\": \"pages/Common/Url/index\",\n" +"        \"$title\": \"照明\",\n" +"        \"$url_query\": \"\",\n" +"        \"$referrer\": \"pages/Common/Url/index\",\n" +"        \"$referrer_title\": \"照明\",\n" +"        \"$url\": \"pages/Common/Url/index\",\n" +"        \"$is_first_day\": false,\n" +"        \"$ip\": \"11.11.11.11\",\n" +"        \"$browser\": \"WeChat\",\n" +"        \"$browser_version\": \"8\",\n" +"        \"$track_signup_original_id\": \"oiF\",\n" +"        \"$is_login_id\": true,\n" +"        \"$ad_extra_properties\": \"{\\\"sdf_channel_closed\\\":false}\",\n" +"        \"$city\": \"上海\",\n" +"        \"$province\": \"上海\",\n" +"        \"$country\": \"中国\"\n" +"    },\n" +"    \"login_id\": \"77\",\n" +"    \"anonymous_id\": \"oiF\",\n" +"    \"type\": \"track\",\n" +"    \"event\": \"$MPShow\",\n" +"    \"_track_id\": 5692,\n" +"    \"time\": 1703,\n" +"    \"_flush_time\": 17032,\n" +"    \"device_id\": \"oiFOU\",\n" +"    \"project_id\": 2,\n" +"    \"map_id\": \"oiFOU\",\n" +"    \"user_id\": -4011,\n" +"    \"recv_time\": 1703,\n" +"    \"extractor\":\n" +"    {\n" +"        \"f\": \"sdf_input_topic\",\n" +"        \"o\": 379,\n" +"        \"n\": \"sdf_input_topic\",\n" +"        \"s\": 379,\n" +"        \"c\": 379,\n" +"        \"p\": 1,\n" +"        \"e\": \"hyb\"\n" +"    },\n" +"    \"edge_progress\":\n" +"    {\n" +"        \"f\": \"(dev=821,ino=537178209)\",\n" +"        \"n\": \"access_log.2023122213\",\n" +"        \"o\": 1400687,\n" +"        \"s\": 37229603,\n" +"        \"c\": 37229604,\n" +"        \"e\": \"hybr\"\n" +"    },\n" +"    \"project\": \"test\",\n" +"    \"ver\": 2\n" +"}";ObjectMapper mapper = new ObjectMapper();JsonNode jsonNode = mapper.readTree(json);Iterator<String> keys = jsonNode.fieldNames();while (keys.hasNext()){String key = keys.next();JsonNode value = jsonNode.get(key);if(value instanceof JsonNode){Iterator<String> subkeys = value.fieldNames();while (subkeys.hasNext()){String subkey = subkeys.next();JsonNode subvalue = value.get(subkey);System.out.println(subkey + " : " + subvalue);}}else{System.out.println(key + ":"+ "\t" + jsonNode.get(key)) ;}}}
}

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总结

分别对两个json解析器进行试用，个人感觉jackson代码比较优雅，类似java jdbc连接数据的使用规范，估计这也是国外特别喜欢用它的原因吧，而fastjson的感觉就是速度特别快，用起来也比较简单，注重实用性，当然了，上面只是一个简单的解析代码，并没有涉及到复杂的操作，由于时间关系，只是简单介绍下两者的使用方法，关于两者的使用，后续会结合项目中的场景持续更新。