Springboot global exception handling method @ControllerAdvice and @ExceptionHandler

import .slf4j.Slf4j;
import ;
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@Slf4j
@ResponseBody
@ControllerAdvice
public class GlobalException {

	/**
	  * System exception handling
	  *
	  * @param ex Exception
	  * @return
	  */
	@ExceptionHandler(value = )
	public Result defaultErrorHandler(Exception ex) {
		("System exception:{}", ex);
		return (StatusEnum.SYSTEM_ERROR);
	}

	/**
	  * BindException
	  *
	  * @param e Exception
	  * @return
	  */
	@ExceptionHandler()
	public Result handleBingException(BindException e) {
		FieldError fieldError = ();
		String message = ();
		return (StatusEnum.SYSTEM_ERROR);
	}

	/**
	  * Handle @RequestBody parameter verification exception
	  *
	  * @param e Exception information
	  * @return
	  */
	@ExceptionHandler()
	public Result handleMethodArgumentNotValidException(MethodArgumentNotValidException e) {
		BindingResult bindingResult = ();
		FieldError fieldError = ();
		String code = ();
		String message = ();
		return (errorCode, message);
	}
}

@Data
public class Result<T> {

	/**
	  * Status value
	  */
	private Boolean status;

	/**
	  * Status code
	  */
	private String code;

	/**
	  * Status information
	  */
	private String message;

	/**
	  *Returned results
	  */
	private T result;

	/**
	  * Constructor
	  *
	  * @param code status code
	  * @param message prompt message
	  */
	public Result(String code, String message) {
		 = false;
		 = code;
		 = message;
	}

	/**
	  * Constructor
	  *
	  * @param status
	  * @param code status code
	  * @param message prompt message
	  */
	public Result(Boolean status, String code, String message) {
		 = status;
		 = code;
		 = message;
	}

	/**
	  * Constructor
	  *
	  * @param status
	  * @param code status code
	  * @param message prompt message
	  * @param result
	  */
	public Result(Boolean status, String code, String message, T result) {
		 = status;
		 = code;
		 = message;
		 = result;
	}

	// ------------------------------------------------------------------------------------------------------------------------------
	/**
	  * Enumeration status code
	  */
	private static final String CODE;

	/**
	  * Enumerated prompt information
	  */
	private static final String MESSAGE;

	/**
	 * 500
	 */
	private static final String ERROR_CODE;

	/**
	  * The status code returned successfully
	  */
	private static final String SUCCESS_CODE;

	/**
	  * Status information returned successfully
	  */
	private static final String SUCCESS_MSG;

	/**
	  * Static code block initialization
	  */
	static {
		// The status code that was successfully returned		CODE = "getCode";
		// Enumerated prompt information		MESSAGE = "getMessage";
		//Exception code		ERROR_CODE = "500";
		// The status code that was successfully returned		SUCCESS_CODE = "200";
		// Status information returned successfully		SUCCESS_MSG = "The operation is successful";
	}

	/**
	  * Operation is successful
	  *
	  * @return Return result
	  */
	public static Result success() {
		return new Result(true, SUCCESS_CODE, SUCCESS_MSG);
	}

	/**
	  * Operation is successful
	  *
	  * @return Return result
	  */
	public static <T> Result success(T result) {
		return new Result(true, SUCCESS_CODE, SUCCESS_MSG, result);
	}

	/**
	  * Returns exception
	  *
	  * @param t Generic Enumeration
	  * @param <T> Generics
	  * @return Return result
	  */
	public static &lt;T extends Enum&gt; Result error(T t) {
		return error(t, CODE, MESSAGE, null);
	}

	/**
	  * Returns exception
	  *
	  * @param t Generic Enumeration
	  * @param message prompt message
	  * @param <T> Generics
	  * @return Return result
	  */
	public static &lt;T extends Enum&gt; Result error(T t, String message) {
		return error(t, CODE, MESSAGE, message);
	}

	/**
	  * Returns exception
	  *
	  * @param code status code
	  * @return Return result
	  */
	public static Result error(String code) {
		return new Result(code, null);
	}

	/**
	  * Returns exception
	  *
	  * @param code status code
	  * @param message prompt message
	  * @return Return result
	  */
	public static Result error(String code, String message) {
		return new Result(code, message);
	}

	/**
	  * Returns exception
	  *
	  * @param t Returned enum
	  * @param codeMethod state method
	  * @param msgMethod status code for prompt message
	  * @param <T> Generics
	  * @return Return result object
	  */
	public static &lt;T extends Enum&gt; Result error(T t, String codeMethod, String msgMethod, String message) {
		try {
			Class&lt;?&gt; aClass = ();
			String code = (codeMethod).invoke(t).toString();
			message = (message) ? (msgMethod).invoke(t).toString() : message;
			return new Result(code, message);
		} catch (Exception e) {
			return new Result(ERROR_CODE, ());
		}
	}

	// --- Rewrite method ---
	/**
	  * Rewrite the toString method
	  *
	  * @return Return JSON string
	  */
	@Override
	public String toString() {
		return (this);
	}

	/**
	  * toJsonString method
	  *
	  * @return Return JSON string
	  */
	public String toJsonString() {
		return (this);
	}
}

public enum StatusEnum {

	/**
	  * Operation is successful
	  */
	OK("200", "The operation is successful"),

	/**
	  * No access permission
	  */
	NOT_PERMISSION("403", "No access permission"),

	/**
	  * No login or login has expired
	  */
	NOT_LOGIN("405", "No login or login has expired"),

	/**
	  * The system is busy, please try again later
	  */
	SYSTEM_ERROR("500", "The system is busy, please try again later");

	/**
	  * Constructor
	  *
	  * @param code status code
	  * @param message prompt message
	  */
	StatusEnum(String code, String message) {
		 = code;
		 = message;
	}

	/**
	  * Status code
	  */
	private String code;

	/**
	  * Prompt message
	  */
	private String message;

	/**
	  * Get the status code
	  *
	  * @return status code
	  */
	public String getCode() {
		return code;
	}

	/**
	  * Get prompt information
	  *
	  * @return prompt message
	  */
	public String getMessage() {
		return message;
	}
}