以JSON列表而不是JSON对象的形式返回Spring Boot错误响应

import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;

@RestController
public class CustomErrorController implements ErrorController {

    @RequestMapping("/error")
    public ResponseEntity<List<String>> error(HttpServletRequest request) {
        List<String> errors = new ArrayList<>();
        errors.add("Error occurred: " + request.getAttribute("javax.servlet.error.message"));
        return new ResponseEntity<>(errors, HttpStatus.INTERNAL_SERVER_ERROR);
    }

    @Override
    public String getErrorPath() {
        return "/error";
    }
}