如何反序列化JSON HashMap <String, Object> ？

Question

This is my situation:

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

public void setName(String x) {put("name", x);}
public String getName() {return (String)get("name");}

public void setAge(Integer x) {put("age", x);}
public Integer getAge() {return (Integer)get("age");}

public void setUUID(UUID x) {put("uuid", x);}
public UUID getUUID() {return (UUID)get("uuid");}

Now when I generate JSON from this object I get {"data":{"name": ...}} I don't want the "data":{} part.

How to fix this?

[EDIT] When this class is exported as JSON by Spring the format is exactly what I want.

Answer 1

Since your entire class seems to be inside a map, simply add a getter method for the Map to you class and instead of serializing the class itself, do it like:

gson.toJson(foo.getData())

On a side note, I gotta say it is pretty awkward having getters and setters doing actions on a map.

Answer 2

This works for me.

    ObjectMapper mapper = new ObjectMapper();
    String json = mapper.writeValueAsString(myClass);