How to make the server slide form validation using JSP?

Question

anyone knows how to do server-side form validation??
Thanks in advanced

Answer 1

try this way
     //create a validation java class in that class u create separate methods for validating
     for example if u want to validate that a particular text box should not be empty
     then u can try this way
     say like this
     class ServerValidation()
     boolean message=false;
     public static boolean isTextBoxEmpty(String value)
     if(value.length<1)
     System.out.println("Text box is empty");
     message=false
     else
     message=true
     return message
now say u r having a html page in which there is a text box on submiting u call say validate.jsp
in this jsp u write this way
<%
String message=request.getParameter("name of ur text box");
boolean b=ServerValidation.isTextBoxEmpty(message)
if(b)
//valid is true do ur other activity
else
String messageToUser="Please Enter Some value"
u can now display this message on jsp and create a back button
%>
hope its clear