java调用bson4jackson_java–哪一个更轻,JSON或BSON？

我编写了将对象序列化为JSON和BSON的代码。根据我的输出&＃xff0c;生成的BSON的大小比JSON大。这是预期吗&＃xff1f;

从我的代码为Bson.class(使用Jackson和bson4jackson)

private ByteArrayOutputStream baos &＃61; new ByteArrayOutputStream();

private BsonFactory fac &＃61; new BsonFactory();

private ObjectMapper mapper &＃61; new ObjectMapper(fac);

public Bson(Object obj) throws JsonGenerationException,

JsonMappingException, IOException {

mapper.writeValue(baos, obj);

}

public int size() {

return baos.size();

}

public String toString() {

byte[] bytes &＃61; baos.toByteArray();

return new String(bytes);

}

从我的Json.class

private ByteArrayOutputStream baos &＃61; new ByteArrayOutputStream();

private ObjectMapper mapper &＃61; new ObjectMapper();

public Json(Object obj) throws JsonGenerationException,

JsonMappingException, IOException {

mapper.writeValue(baos, obj);

}

(size()和toString()如上)

我的POJOs是Person.class和Address.class。

在我的主类&＃xff1a;

Address a &＃61; new Address("Jln Koli", "90121", "Vila", "Belgium");

Person p &＃61; new Person("Ali Bin Baba", new Date(), 90.0, 12, a);

List persons &＃61; new LinkedList<>();

persons.add(p);

persons.add(p);

Bson bson &＃61; new Bson(persons);

Json json &＃61; new Json(persons);

System.out.println("Bson : " &＃43; bson.size() &＃43; ", data : " &＃43; bson.toString());

System.out.println("Json : " &＃43; json.size() &＃43; ", data : " &＃43; json.toString());

输出&＃xff1a;

Bson : 301, data : -

Json : 285, data : [{"name":"Ali Bin Baba","birthd...

我的问题&＃xff1a;

>是输出true&＃xff0c;还是我的代码错误&＃xff1f;

>任何建议检查/测试&＃xff0c;比较BSON和JSON的大小&＃xff1f;