How Can Be Read Data From a Form in a JSP ?

There is a built-in request object in a JSP that provides methods to read Form data. Some of the methods are as follows...

1 - getParameterNames() : This method returns the list of all the parameters in the Form.

2 - getParameter() : We call this method to get the value of parameter set in the Form. It returns null if the parameter is not found.

3 - getParameterValues() : If a Parameter is mentioned multiple times in a Form, we use request.getParameterValues() method to get all the values. This method returns an array of String values.

4 - getParameterMap() : This method returns the map of all the Parameters in Form.

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