struts tags in question

modify
how can not pass parameters ? ? ? ?
you great God, and seeking solutions .
What causes behind the string "id =% {id}" gone.
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then you are certainly not id value .
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id --- --- id
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pass before look into whether there is value id
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% {} this horse is God .
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% {id} is OGNL expressions , id write a value to look dead , so that means that id is a string to write , and to see whether the type of right
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Make sure the stack has a value
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Thank you pro . . .
now been resolved.
just that . action behind the parameters of the problem .
The default extension is added . action