Spring Boot 如何自定义返回错误码错误信息

INTERNAL_SERVER_ERROR(500, "Internal Server Error"),

public enum ErrorEnum {  /*   * 错误信息   * */  E_20011(20011, "缺少必填参数"),  ;  private Integer errorCode;  private String errorMsg;  ErrorEnum(Integer errorCode, String errorMsg) {    this.errorCode = errorCode;    this.errorMsg = errorMsg;  }  public Integer getErrorCode() {    return errorCode;  }  public String getErrorMsg() {    return errorMsg;  }

public class BusinessException extends RuntimeException {  private static final long serialVersionUID = 1L;  private Integer code;  /**   * @param errorEnum 以错误的ErrorEnum做参数   */  public BusinessException(ErrorEnum errorEnum) {    super(errorEnum.getErrorMsg());    this.code = errorEnum.getErrorCode();    this.resultJson = CommonUtil.errorJson(errorEnum);  }  public Integer getCode() {    return code;  }  public void setCode(Integer code) {    this.code = code;  }}

public class ExceptionResponse {  private String message;  private Integer code;  public ExceptionResponse(Integer code, String message) {    this.message = message;    this.code = code;  }  public static ExceptionResponse create(Integer code, String message) {    return new ExceptionResponse(code, message);  }  public Integer getCode() {    return code;  }  public String getMessage() {    return message;  }}

@ControllerAdvice@Slf4jpublic class ExceptionHandler {  @ResponseBody  @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)  @ExceptionHandler(Exception.class)  public ExceptionResponse handleException(Exception ex) {    if (ex instanceof BusinessException) {      log.warn(ex.getMessage(), ex);      BusinessException businessException = (BusinessException) ex;      return ExceptionResponse.create(businessException.getCode(), businessException.getMessage());    } else {      log.error(ex.getMessage(), ex);      return ExceptionResponse.create(HttpStatus.INTERNAL_SERVER_ERROR.value(), ex.getMessage());    }  }}

@PostMapping("test/exception")  public String testException() {    throw new BusinessException(ErrorEnum.E_20011);  }

{ "message": "缺少必填参数", "code": 20011 }