jsoniter java_dslJson、jsoniter、fastjson、jackson解析字符串为map效率比较

package test;

import cn.hutool.core.lang.Console;

import cn.jiguang.entity.ErrorMessage;

import com.alibaba.fastjson.JSON;

import com.dslplatform.json.DslJson;

import com.dslplatform.json.JsonReader;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.jsoniter.JsonIterator;

import com.jsoniter.ValueType;

import org.junit.Before;

import org.junit.Test;

import org.springframework.util.Assert;

import java.io.*;

import java.util.Map;

import java.util.concurrent.atomic.AtomicReference;

/**

* @desc: dsl-json fastjson jackson jsoniter 效率比较

* @author: zengxc

* @date: 2018/4/4

*/

public class JSONTest {

private static final ObjectMapper MAPPER = new ObjectMapper();

public static String[] factors = {};

private static String JSON_STR = null;

private static int count = 0;

private final DslJson dslJson = new DslJson();

@Test

public void testJsoniter2() throws IOException {

JsonIterator jsonIterator = JsonIterator.parse("[123,{'id':20, 'errorMsg':'this error'},456]".replace('\'', '"'));

AtomicReference errorMessage = new AtomicReference<>();

jsonIterator.readAny().forEach(any -> {

if (any.valueType() == ValueType.OBJECT) {

errorMessage.set(any.as(ErrorMessage.class));

}

});

Console.print(errorMessage.get());

Assert.isTrue(true, "Not to false");

}

@Test

public void testJsoniter() throws IOException {

JsonIterator jsonIterator = JsonIterator.parse("{'id':10, 'errorMsg':'this error'}".replace('\'', '"'));

ErrorMessage errorMessage = jsonIterator.read(ErrorMessage.class);

Assert.notNull(errorMessage, "can't be empty ");

}

@Test

public void testFor() throws IOException {

File file = new File("out.txt");

file.mkdirs();

PrintWriter printWriter = new PrintWriter(file);

StringBuffer buffer = new StringBuffer();

buffer.append("{");

for (int i = 0; i < 1000000; i++) {

if (i == 999999) {

buffer.append("\"k" + i + "\":" + "\"v" + i + "\"" + "}");

break;

}

buffer.append("\"k" + i + "\":" + "\"v" + i + "\"" + ",");

}

printWriter.println(buffer.toString());

printWriter.flush();

}

@Before

public void init() throws Exception {

FileReader fis = new FileReader(new File("D:\\WorkSpace\\springboot-helloworld\\out.txt"));

BufferedReader br = new BufferedReader(fis);

JSON_STR = br.readLine();

}

@Test

public void testFastJson() {

long startTime = System.currentTimeMillis();

Map map = JSON.parseObject(JSON_STR, Map.class);

map.forEach((k, v) -> {

count++;

});

System.out.println(System.currentTimeMillis() - startTime);

System.out.println(count);

}

@Test

public void testJsoniter03() throws IOException {

long startTime = System.currentTimeMillis();

JsonIterator jsonIterator = JsonIterator.parse(JSON_STR);

Map map = jsonIterator.readAny().as(Map.class);

map.forEach((k, v) -> {

count++;

});

System.out.println(System.currentTimeMillis() - startTime);

System.out.println(count);

}

@Test

public void testJackson() throws IOException {

long startTime = System.currentTimeMillis();

Map map = MAPPER.readValue(JSON_STR, Map.class);

map.forEach((k, v) -> {

count++;

});

System.out.println(System.currentTimeMillis() - startTime);

System.out.println(count);

}

@Test

public void testDslJson() throws IOException {

long startTime = System.currentTimeMillis();

final byte[] buff = JSON_STR.getBytes("UTF-8");

JsonReader jsonReader = dslJson.newReader(buff);

Map map = jsonReader.next(Map.class);

map.forEach((k, v) -> {

count++;

});

System.out.println(System.currentTimeMillis() - startTime);

System.out.println(count);

}

}

结论：

dslJson > jsonIter > fastJson > jackson