As easy as counting.

<dependency>
  <groupId>io.github.xiaoxunyao</groupId>
  <artifactId>restful-return</artifactId>
  <version>0.0.3</version>
</dependency>

@GetMapping("/demo")
public Result demo(){
	List<String> list = new ArrayList<>();
	for (int i = 0; i < 10; i++){
		list.add(String.valueOf(i));
	}
	return Result.internalServerError(list);
}