Well, actually, as far as I tested, the problem happened for all values entered. I suppose the real reason is like David said: probably struts doesn't make the conversion, or at least doesn't make the right conversion.
I wrote converter functions and so far they are working well. So I suppose the problem is solved, though I'll only be sure as time goes by. Thanks you all On 9/13/05, Andreas Solarik <[EMAIL PROTECTED]> wrote: > > Just my 2 cents: > > We had a horrible/stupid problem creep up on us with the sign extension in > java when working with bytes (which are 2s complement, just like all other > primitive number types). Strange things would happen when the value of the > byte was greater then 127. In hindsight, it was an elementary problem, but > it caught us off guard and we wasted half a day looking in the wrong > places. > Now we have lots of things like: > > byte b=(some 8bit bit pattern); > int i=b & 0x00ff; // <--- that is the important thing if you want to treat > the bit pattern as unsigned > > its not nice, but works (except if i have a typo). Maybe someone will > learn > from our mistakes. Because its *always* easier to learn from other peoples > mistakes than getting stuck on your own. Maybe your byte and String > problems > only occured when the respective ASCII code had a "1" as the MSB (sign bit > for 2s complement numbers)? > > Andreas > > > -----Ursprüngliche Nachricht----- > Von: David Delbecq [mailto:[EMAIL PROTECTED] > Gesendet: Dienstag, 13. September 2005 09:52 > An: Struts Users Mailing List > Betreff: Re: Could struts be corrupting my byte[]? > > > Le Lundi 12 Septembre 2005 16:36, Letícia Álvares Barbalho a écrit : > > I did what you suggested and changed from byte[] to String, leaving to > > conversion to hibernate's level. It did solve the problem, thank you. > > > > But I'm wondering here... I still got a problem with the charset, don't > I? > > > > Well if String is correct in form, you don't have charset problems in the > struts > part (decoded ok from browser's POST to ActionForm). However, am not sure > struts handle automatic conversion from String to byte[]. When your action > forms is filled, > here is what happens in non-fileupload forms: > - Browser send form field in a specific encoding. > - Servlet container or commons-fileupload decodes submitted datas and > convert them to string parameters > - Struts take all submited parameters and uses the beanutils populate() > method to fill ActionForm > - For each parameter, populate tries to convert the String to the > appropriate Setter parameter using converters > - In the case of a setXXX(byte[]) signature, the ByteArrayConverter is > used. > > As far as i can see in this converter source, it's purpose is to convert a > string like "58,107,24,89" into byte[] {58,107,24,89} > which is not what you want i think. > > Why i suggested you to explicitly specify the charset used in String to > byte[] is because you are storing text in blob on your database, > that means you must have decided when designed the database, which charset > you wanted to use (i assumed utf-8). > You must remain consistent in your various byte[]<->String conversion to > this blob field. > I suggested UTF-8, but maybe some other thing might be more suitable for > you. > > Anyway, once you have decided a charset for your blob, stick with it. > > -- > David Delbecq > Royal Meteorological Institute of Belgium > > - > Is there life after /sbin/halt -p? > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > -- Letícia Álvares Barbalho [EMAIL PROTECTED]
