Spring mvc question

[jeff mutonho]

How do I avoid doing this and use some validation mechanism for the
request parameters:

String n1 = request.getParameter( "n1" );
String n2 = request.getParameter( "n2" );
.....
....
String n100 = request.getParameter( "n100" );

if ( n1 == null ) {
n1 = "";
}

if ( n2 == null ) {
n2 = "";
}
......
......

if ( n100 == null ) {
n100 = "";
}

[Sonny Gill]

If these are JavaBean properties and you are using a Command/Form Controller you could use a custom property editor that sets a property to empty String if the corresponding request parameter value is null.