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about Struts processPreprocess method

 
ganesh.udt kumar
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Hi java folks,
Help me to know the use of overriding processPreprocess() method .What is the usual scenario that will make me to use this method . Can I use this for client validation, so that the request need not travel to Action class to find out that the user is not valid? Can I access DB from processPreprocess method.
thanks
ganesh
 
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