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Head First Servlets and JSP, 2nd Edition by Bert Bates, Bryan Basham, Kathy Sierra

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Request parameters in EL

Piece of cake. The param implicit object is fine when you know you have only one parameter for that particular parameter name. Use paramValues when you might have more than one parameter value for a given parameter name.

In the HTML form

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In the JSP

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In the client’s browser (client fills in the form and hits the submit button)

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The response

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