Json，Jackson和序列化

Question

I've started to using Json with Jackson library and i found little problem.

I'm creating Json object:

ObjectMapper mapper = new ObjectMapper();

Map<String, Object> userInMap = new HashMap<String, Object>();

then i'm adding fields:

userInMap.put("user", "active");
userInMap.put("uuid", uuid);

And after all when im trying to output this object i have Json object but without " , i mean i supposed to have:

{"user":"active", "uuid":"lasdnfa"}

but i have:

{user:active, uuid:lasdnfa}

and another thing - i want to add this object to memcache, but before i do this, i have to serialize this object. How i can serialize Json object?

Thanks

Answer 1

如果在对象上使用toString() ，则可能需要您的映射器以这种方式输出值：

System.out.println(mapper.writeValueAsString(userInMap)));