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::

  • getParameterNames(): This method returns the list of all the parameters in the Form.
  • getParameter(): We call this method to get the value of parameter set in the Form. It returns null if the parameter is not found.
  • 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.
  • getParameterMap(): This method returns the map of all the Parameters in Form.
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