Springboot custom global exception problem

/**
  * @Description: Exception that occurs in the runtime business
  * @Param:
  * @Return :
  * @Author : l-jiahui
  * @Date: 2020-10-11
  */
public class BizException extends RuntimeException {

    private static final long serialVersionUID = -7864604160297181941L;

    private final String code;

    /**
      * @Description : Specify the error class in the enumeration class
      * @Param : [errorCode]
      * @Return :
      * @Author : l-jiahui
      * @Date: 2020-10-11
      */
    public BizException(final BizExceptionCode exceptionCode) {
        super(());
         = ();
    }
    /**
      * @Description: Specify the information about the specific business error
      * @Param : [detailedMessage]
      * @Return :
      * @Author : l-jiahui
      * @Date: 2020-10-11
      */
    public BizException(final String message) {
        super(message);
         = ();
    }

    public String getCode() {
        return code;
    }
}

/**
  * @Description : Error code interface for business exceptions
  * @Param:
  * @Return :
  * @Author : l-jiahui
  * @Date: 2020-10-11
  */

public interface BizExceptionCode {

    /**
      * @Description : Get the error code
      * @Param : []
      * @Return :
      * @Author : l-jiahui
      * @Date: 2020-10-11
      */
    String getCode();
    
    /**
      * @Description : Get error message
      * @Param : []
      * @Return :
      * @Author : l-jiahui
      * @Date: 2020-10-11
      */
    String getMessage();

}

/**
  * @Description : The enumeration class of exception message (this class belongs to the business exception enumeration class)
  * @Param:
  * @Return :
  * @Author : l-jiahui
  * @Date: 2020-10-11
  */
public enum BizExceptionCodeEnum implements BizExceptionCode{

    // The specified exception, when the exception is used, the message does not return to the front end, and the message specified when the front end is thrown.    SPECIFIED("-1","The system exception occurs, please try again later"),

    // Common business exceptions    USER_NAME_NULL("-1","The username cannot be empty, please re-enter!"),
    USER_PASSWORD_NULL("-1","The password cannot be empty, please re-enter!"),
    USER_PASSWORD_WRONG("-1","The password is wrong, please check and re-enter!"),
    PAGE_NUM_NULL("4001","The page number cannot be empty"),
    PAGE_SIZE_NULL("4002","The number of pages cannot be empty"),
    SEARCH_NULL("4004","The search criteria cannot be empty, please check and re-enter!"),
    NO_LOGIN("3001", "User not logged in")
    ;

    private final String code;

    private final String message;

    /**
     * @Description :
     * @Param : [code, message]
     * @Return :
     * @Author : l-jiahui
     * @Date : 2020-10-11
     */
     BizExceptionCodeEnum(String code,String message){

         = code;
         = message;
    }

    @Override
    public String getCode() {
        return code;
    }

    @Override
    public String getMessage() {
        return message;
    }
}

/**
  * @author l-jiahui
  * extend of {@link ResponseEntityExceptionHandler} for handle all exception
  * @Description: Global catch exception and custom global catch exception
  */
@ControllerAdvice
public class GlobalControllerAdvice {

    /**
      * Intercept and catch custom exceptions
      *
      * @param bizException Custom exception
      * @return map
      */
    @ResponseBody
    @ExceptionHandler(value = )
    public Map<String, Object> myExceptionHandler(BizException bizException, HttpServletResponse response) {
        Map<String, Object> map = new HashMap<>(16);
        ("code", ());
        ("msg", ());
        ((()));
        return map;
    }

    /**
      * Added unified error message for processing 404
      *
      * @param response response object
      * @return Return the object information corresponding to the map
      */
    @ExceptionHandler(value = {})
    @ResponseStatus(HttpStatus.NOT_FOUND)
    @ResponseBody
    public Map<String, Object> notFoundException(HttpServletResponse response) {
        Map<String, Object> map = new HashMap<>(16);
        ("code", "404");
        ("msg", "not found exception");
        (404);
        return map;
    }
}