How to create a parent child Json response in Spring Boot with a Enum using Java

I am trying to create a json response from a Spring boot application where the name of the enum will be the parent structure and below that all the child will be residing . What i have created is showing only the child hierarchy but i want the parent also .Like i want below

items: [
{
title: "ABC ",
subTitle: "",
description:
"123  ",
url: "",
},
{
title: "Revenue",
subTitle: "",
description:
"Digitally ",
url: "",
},
{
title: "xyz",
subTitle: "",
description:
"345,",
url: "stackoverflow.com",
},
{
title: "kji",
subTitle: "",
description:
"890",
url: "",
},
{
title: "KOI",
subTitle: "",
description:
"054,",
url: "",
},
]

what i am getting is

[
{
title: "ABC ",
subTitle: "",
description:
"123  ",
url: "",
},
{
title: "Revenue",
subTitle: "",
description:
"Digitally ",
url: "",
},
{
title: "xyz",
subTitle: "",
description:
"345,",
url: "stackoverflow.com",
},
{
title: "kji",
subTitle: "",
description:
"890",
url: "",
},
{
title: "KOI",
subTitle: "",
description:
"054,",
url: "",
},
]

Below are codes what i have used

import java.util.Arrays;
import java.util.List;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class EnumController {
@GetMapping("/getEnumResponse")
public List<TreeEnum> getCurrentContent() {
MyData  mData = new MyData ();
return Arrays.asList(TreeEnum.values());
} 
}
import com.fasterxml.jackson.annotation.JsonFormat;
@JsonFormat(shape=JsonFormat.Shape.OBJECT)
public enum TreeEnum {
VALUE1 ("Pay","","Digitally.",""),
VALUE2 ("Revenue","","enable",""),
VALUE3("Banking","","Treasury Reporting etc","CHOICE"),
VALUE4("Accounting","","Corporate","");
private String title;
private String subTitle;
private  String url;
private String description;
Response(String title,String subTitle,String description,String url) {
this.title = title;
this.subTitle = subTitle;
this.description = description;
this.url = url;
}
public String getTitle() {
return title;
}
public String getSubTitle() {
return subTitle;
}
public String getUrl() {
return url;
}
public String getDescription() {
return description;
}
}
import java.util.List;
public class MyData {
private List<TreeEnum > responses;
public List<TreeEnum > getResponses() {
return responses;
}
public void setResponses(List<Response> responses) {
this.responses = responses;
}
}

You are returning collection of the items, you need to return object with attribute items that will contain the collections.

This can be accomplished with Map.

@GetMapping("/getEnumResponse")
public Map getCurrentContent() {
   Map response = new HashMap();
   response.put("items", TreeEnum.values());
   return response;
} 

If you are on Java9 or beyond you can do

@GetMapping("/getEnumResponse")
public Map getCurrentContent() {
   return Map.of("items", TreeEnum.values());
} 

Create an ItemDto and in that you pass List of TreeEnum. YOu can also use @JsonRootName("Item") if you don't want list and in your mapping enable root value mapper.enable(SerializationFeature.WRAP_ROOT_VALUE);