Change JSON key without changing variable name in POJO

Question

I have a class definition say

class Employee {
 String id;
 String name;
 int age;
 //getters and setters
}

I want to create a json object out of it as follows

{
  "id" : "A12",
  "employee_name" : "Abhishek"
  age : 97
}

Notice that employee_name does not correspond to POJO variable name. So can I add certain annotation which will help me do so ? Something Like

@JSONKey(value="employee_name")
String name

Give solutions related to GSON and/or Jackson.

Answer 1

In Jackson use @JsonProperty

E.g.:

@JsonProperty(value="employee_name")
String name

with GSON use @SerializedName

@SerializedName(value="employee_name")
String name

Answer 2

With Gson you can use the @SerializedName annotation

@SerializedName("employee_name")
String name;

Answer 3

You can use @JsonProperty for Jackson: Change field name in JSON using Jackson

And @SerializedName for Gson: Convert JSON style properties names to Java CamelCase names with GSON