How can use Gson. ToJson change finally get a json string tree structure?-CodePudding

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How can use Gson. ToJson change finally get a json string tree structure?

Time：03-20

Such as an object existing User

 
Public class User {
private int code; 
private String name; 
private int age; 
}

Directly through the gson. ToJson (user) can get the following string:

 
{" code ": 100," name ":" Tom ", "age" : 18}

But how to through the gson library status code and the separation of data required, get the string?

 
{" code ": 100," data ": {" name" : "Tom", "age" : 18}}