自定义异常处理几条错误消息

// 定义自定义异常类
public class BusinessException extends RuntimeException {
    private String errorCode;
    private String errorMessage;

    public BusinessException(String errorCode, String errorMessage) {
        super(errorMessage);
        this.errorCode = errorCode;
        this.errorMessage = errorMessage;
    }

    public String getErrorCode() {
        return errorCode;
    }

    public String getErrorMessage() {
        return errorMessage;
    }
}

// 在业务逻辑中使用自定义异常
public class UserService {
    public void registerUser(String username, String password) {
        if (username == null || username.isEmpty()) {
            throw new BusinessException("USER_NAME_EMPTY", "用户名不能为空");
        }
        // 其他业务逻辑...
    }
}

// 全局异常处理
@ControllerAdvice
public class GlobalExceptionHandler {
    @ExceptionHandler(BusinessException.class)
    @ResponseBody
    public Map<String, String> handleBusinessException(BusinessException ex) {
        Map<String, String> result = new HashMap<>();
        result.put("errorCode", ex.getErrorCode());
        result.put("errorMessage", ex.getErrorMessage());
        return result;
    }
}