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I'm passing one parameter param from jsp to servlet having a value like %xyz.

When I'm trying to get the value in servlet by request.getParameter("param") I'm not getting any value.

Instead it is coming as blank (Not even Null).

Can, anyone please explain the reason.

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The % is a special character in uri. You have to encode the % value using uri encoding. In your case the % should be encoded as %25

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