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In a servlet you can call either getOutputStream or getWriter but only one,
calling the other later gets an IllegalStateException. Is there a way of
finding out what has already been called?

Thanks

Jon

John Smith のメッセージ:

> In a servlet you can call either getOutputStream or getWriter but only one,
> calling the other later gets an IllegalStateException. Is there a way of
> finding out what has already been called?
>
> Thanks
>
> Jon

> calling the other later
Just don't do it.

John Smith wrote:
> In a servlet you can call either getOutputStream or getWriter but only one,
> calling the other later gets an IllegalStateException. Is there a way of
> finding out what has already been called?

the best solution is to know what you call. There is no point in writing
binary data to a writer. I would say this is also the meaning of the
exception.

Besides that, I'm afraid the only possibility to know that a method has
been called is to catch the exception when you try to call the other one.