java - 无法捕获java中的自定义异常

Question

在我的资源方法中，我将得到以下异常

@Override
    public Response registerByDebitCard(RegistrationRequest registrationRequest,BeanFilter beanFilter) {
        try {


            RegistrationResponse registrationResponse = registrationService.doRegister(registrationRequest, beanFilter);

            return Response.ok(registrationResponse).build();
        } catch (CannotCreateTransactionException e) {
            LOGGER.error("Error Message is :: {}", e.getMessage());
            throw new RegistrationFailureException("MPYR0012", "Due to database technical problem signup failed");
        }
    }

如果我捕获上述异常，它就可以工作。我尝试使用我无法捕获的自定义异常类来捕获此异常。下面是我的自定义异常类。

public class TransactionManagerDBException extends CannotCreateTransactionException {

    /**
     * @param msg
     */
    public TransactionManagerDBException(String msg) {
        super(msg);

    }

    public TransactionManagerDBException(String msg, Throwable cause) {
        super(msg, cause);

    }

}

我的资源方法:

@Override
        public Response registerByDebitCard(RegistrationRequest registrationRequest,BeanFilter beanFilter) {
            try {


                RegistrationResponse registrationResponse = registrationService.doRegister(registrationRequest, beanFilter);

                return Response.ok(registrationResponse).build();
            } catch (TransactionManagerDBException e) {
                LOGGER.error("Error Message is :: {}", e.getMessage());
                throw new RegistrationFailureException("MPYR0012", "Due to database technical problem signup failed");
            }
        }

现在我无法捕获这个异常。他们在我的异常处理中是否有任何问题。请解释我的方法有什么问题

任何帮助将不胜感激!!!!

Answer 1

您的TransactionManagerDBException是CannotCreateTransactionException。但反之则不然。如果您的 registrationService 确实抛出 CannotCreateTransactionException，它不是 TransactionManagerDBException。

如果无法更改 doRegister 方法以引发 TransactionManagerDBException，则只能使用 CannotCreateTransactionException 来使用 catch block 。