【性能测试】JSON工具对比 fastjson jackson

推荐 jackson

依赖

        <!-- fastjson https://mvnrepository.com/artifact/com.alibaba/fastjson --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.75</version></dependency><!-- 工具集 https://mvnrepository.com/artifact/cn.hutool/hutool-all --><dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.5.8</version></dependency><!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>2.12.1</version>
</dependency>

JsonUtil (jackson)

package com.gw.common.utils;import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;import java.util.List;/*** @Title: jackson工具类* @Description: 描述* @Version: v1.0* @Author: Mr.Guan* @Mail GuanWeiMail@163.com* @DateTime: 2021-02-24* @Project springcloud-gw-parent* @Package com.guanwei.study.json*/
public class JsonUtil {/*** 定义jackson对象*/private static final ObjectMapper MAPPER = new ObjectMapper();/*** 将对象转换成json字符串。* <p>Title: pojoToJson</p>* <p>Description: </p>* @param data* @return*/public static String toJsonStr(Object data) {try {
//            ObjectWriter writer = MAPPER.writer();
//            String string = writer.writeValueAsString(data);String string = MAPPER.writeValueAsString(data);return string;} catch (JsonProcessingException e) {e.printStackTrace();}return null;}/*** 将json结果集转化为对象** @param jsonData json数据* @param beanType 对象中的object类型* @return*/public static <T> T toPojo(String jsonData, Class<T> beanType) {try {T t = MAPPER.readValue(jsonData, beanType);return t;} catch (Exception e) {e.printStackTrace();}return null;}/*** 将json数据转换成pojo对象list* <p>Title: jsonToList</p>* <p>Description: </p>* @param jsonData* @param beanType* @return*/public static <T> List<T> jsonToList(String jsonData, Class<T> beanType) {JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);try {List<T> list = MAPPER.readValue(jsonData, javaType);return list;} catch (Exception e) {e.printStackTrace();}return null;}/*** 获取ObjectMapper* @return*/public static ObjectMapper getObjectMapper() {return JsonUtil.MAPPER;}}

package com.guanwei.study.json;import cn.hutool.json.JSONUtil;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.gw.common.utils.JsonUtil;import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.CountDownLatch;/*** @Title: 测试JSON性能* @Description: jacksonUtil 胜出* @Version: v1.0* @Author: Mr.Guan* @Mail GuanWeiMail@163.com* @DateTime: 2021-02-24* @Project springcloud-gw-parent* @Package com.guanwei.study.json*/
public class JsonTest {/*** 多线程数量*/private static final int mulThreadCount = 1000;private static final int count = 100000;/*** Spring 中默认用到的是Jackson* jacksonUtil 胜出* @param str*/public static void main(String [] str) {Map map = new HashMap<String,Object>(1000000);map = getMapData(map,1000000);int count = JsonTest.count;//hutoolJsonlong hutoolJsonBegin =  System.currentTimeMillis();JSONUtil.toJsonStr(map);for (int i = 0; i < count; i++) {JSONUtil.toJsonStr(new HashMap<>());}long hutoolJsonEnd =  System.currentTimeMillis();System.out.println("hutoolJson-------------time------------------------------------"+(hutoolJsonEnd-hutoolJsonBegin));//jacksonlong jacksonBegin =  System.currentTimeMillis();ObjectMapper jackson = new ObjectMapper();try {jackson.writeValueAsString(map);for (int i = 0; i < count; i++) {jackson.writeValueAsString(new HashMap<>());}long jacksonEnd =  System.currentTimeMillis();System.out.println("jackson-------------time------------------------------------"+(jacksonEnd-jacksonBegin));} catch (JsonProcessingException e) {e.printStackTrace();}//jackson工具 (推荐 速度最快)long jacksonBegin1 =  System.currentTimeMillis();JsonUtil.toJsonStr(map);for (int i = 0; i < count; i++) {JsonUtil.toJsonStr(new HashMap<>());}long jacksonEnd1 =  System.currentTimeMillis();System.out.println("jacksonUtil-------------time------------------------------------"+(jacksonEnd1-jacksonBegin1));//fastJsonlong fastJsonBegin =  System.currentTimeMillis();String s = JSONObject.toJSONString(map);for (int i = 0; i < count; i++) {JSONObject.toJSONString(new HashMap<>());}long fastJsonEnd =  System.currentTimeMillis();System.out.println("fastJson-------------time------------------------------------"+(fastJsonEnd-fastJsonBegin));JsonTest.testMulThreadFastJson();JsonTest.testMulThreadJacksonUtil();}/*** 多线程模式jacksonUtil** @throws InterruptedException*/public static void testMulThreadJacksonUtil() {CountDownLatch countDownLatch = new CountDownLatch(mulThreadCount);long start = System.currentTimeMillis();for (int i = 0; i < mulThreadCount; i++) {int finalI = i;new Thread(() -> {JsonUtil.toJsonStr(new HashMap<>(1));countDownLatch.countDown();}).start();}try {countDownLatch.await();} catch (InterruptedException e) {e.printStackTrace();}System.out.println("jacksonUtil 多线程模式最终用时:" + (System.currentTimeMillis() - start) + "ms");}/*** 多线程模式FastJson** @throws InterruptedException*/public static void testMulThreadFastJson() {CountDownLatch countDownLatch = new CountDownLatch(mulThreadCount);long start = System.currentTimeMillis();for (int i = 0; i < mulThreadCount; i++) {int finalI = i;new Thread(() -> {JSONObject.toJSONString(new HashMap<>(1));countDownLatch.countDown();}).start();}try {countDownLatch.await();} catch (InterruptedException e) {e.printStackTrace();}System.out.println("FastJson 多线程模式最终用时:" + (System.currentTimeMillis() - start) + "ms");}/*** 生成指定数量的map* @param map* @param count* @return*/public static Map getMapData(Map map,int count) {for (int i = 0;i < count;i++) {map.put("a"+i,i);}return map;}}

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