如何在Spring Boot Rest api响应的ResponseEntity中添加自定义属性

public class CustomResponse<T> {
    private T data;
    private String customAttribute;

    // 构造函数、getter和setter方法
    // ...
}

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyController {

    @GetMapping("/example")
    public ResponseEntity<CustomResponse<String>> getExample() {
        CustomResponse<String> customResponse = new CustomResponse<>();
        customResponse.setData("Hello, world!");
        customResponse.setCustomAttribute("Custom value");

        return ResponseEntity.ok(customResponse);
    }
}

{
  "data": "Hello, world!",
  "customAttribute": "Custom value"
}