Gson,FastJson, Jackson测试

来源：互联网发布：linux spi驱动编辑：程序博客网时间：2024/05/20 01:11

Gson是google开源的json序列化和反序列化工具，拥趸众多；FastJson是阿里巴巴开源的json工具，国产高品质；而 Jackson是老牌的json工具，spring的默认json转化就使用jackson。

json作为当前序列化最重要的形式之一，经常应用在各个项目中，而选择一种好的序列化工具当然就很重要，因此，我简单对这三种json工具进行了测试，测试使用Junit 4，分别对一个简单的User对象进行并发10个线程，每个线程1kw次的序列化操作，具体代码如下。

@Test    public void testGson() throws InterruptedException {        final CountDownLatch startLatch = new CountDownLatch(1);        final CountDownLatch endLatch = new CountDownLatch(10);        final Gson gson = new Gson();        final AtomicBoolean isFail = new AtomicBoolean(false);        MallUser user = new MallUser();        user.setAgreementUid("1111");        user.setId(7809808L);        user.setUserId(898080L);        ThreadPoolExecutor executor = new ThreadPoolExecutor(10, 10, 0 , TimeUnit.SECONDS, new ArrayBlockingQueue<>(100));        long start = System.currentTimeMillis();        for(int i= 0; i < 10; i++){            executor.execute(new Runnable() {                @Override                public void run() {                    try{                        startLatch.await();                        for (int j = 0; j < 10000000; j ++){                            gson.toJson(user);                        }                    }catch (Exception e){                        System.out.println(e.getMessage());                        isFail.set(true);                    }finally {                        endLatch.countDown();                    }                }            });        }        startLatch.countDown();        endLatch.await();        System.out.println("gson isFail: " + isFail);        System.out.println("gson 10 threads, execute time: " + (System.currentTimeMillis() - start));    }    @Test    public void testJackson() throws InterruptedException {        final CountDownLatch startLatch = new CountDownLatch(1);        final CountDownLatch endLatch = new CountDownLatch(10);        final ObjectMapper mapper = new ObjectMapper();        final AtomicBoolean isFail = new AtomicBoolean(false);        MallUser user = new MallUser();        user.setAgreementUid("1111");        user.setId(7809808L);        user.setUserId(898080L);        ThreadPoolExecutor executor = new ThreadPoolExecutor(10, 10, 0 , TimeUnit.SECONDS, new ArrayBlockingQueue<>(100));        long start = System.currentTimeMillis();        for(int i= 0; i < 10; i++){            executor.execute(new Runnable() {                @Override                public void run() {                    try{                        startLatch.await();                        for (int j = 0; j < 10000000; j ++){                            mapper.writeValueAsString(user);                        }                    }catch (Exception e){                        System.out.println(e.getMessage());                        isFail.set(true);                    }finally {                        endLatch.countDown();                    }                }            });        }        startLatch.countDown();        endLatch.await();        System.out.println("jackson isFail: " + isFail);        System.out.println("jackson 10 threads, execute time: " + (System.currentTimeMillis() - start));    }    @Test    public void testFastJson() throws InterruptedException {        final CountDownLatch startLatch = new CountDownLatch(1);        final CountDownLatch endLatch = new CountDownLatch(10);        final AtomicBoolean isFail = new AtomicBoolean(false);        MallUser user = new MallUser();        user.setAgreementUid("1111");        user.setId(7809808L);        user.setUserId(898080L);        ThreadPoolExecutor executor = new ThreadPoolExecutor(10, 10, 0 , TimeUnit.SECONDS, new ArrayBlockingQueue<>(100));        long start = System.currentTimeMillis();        for(int i= 0; i < 10; i++){            executor.execute(new Runnable() {                @Override                public void run() {                    try{                        startLatch.await();                        for (int j = 0; j < 10000000; j ++){                            JSON.toJSONString(user);                        }                    }catch (Exception e){                        System.out.println(e.getMessage());                        isFail.set(true);                    }finally {                        endLatch.countDown();                    }                }            });        }        startLatch.countDown();        endLatch.await();        System.out.println("fastjson isFail: " + isFail);        System.out.println("fastjson 10 threads, execute time: " + (System.currentTimeMillis() - start));    }

执行输出结果：

gson isFail: falsegson 10 threads, execute time: 37235fastjson isFail: falsefastjson 10 threads, execute time: 7135jackson isFail: falsejackson 10 threads, execute time: 12622

测试结果如下：

序列化工具时间(ms) Gson 37235 FastJson 7135 Jackson 12622

从执行结果我们可以看到，Gson的耗时最长，是FastJson的5倍左右，是Jackson的三倍左右，而FastJson是耗时最短的，当然，这个结果并不能完全说明FastJson的性能最好，因为测试的对象毕竟是个简单的对象，如果涉及到的对象比较复杂，也许就不是这个结果了。这也说明了FastJson是一款很好的json序列化工具，国产良心之作！希望以后会有越来越多国内的互联网公司致力于开源吧。

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