java - How to provide expression for @RequestParam's defaultValue -

i have controller requestparam used. this

@requestmapping("/hello") public modelandview process(         @requestparam(value = "startdate",                        required = false,                        defaultvalue="yesterday()") startdate) 

if startdate not specified defaultvalue used. in case value should dynamic e.g. now() or yesterday(). there way specify expression e.g. method of class return value?

i lazy use code everywhere

startdate=startdate!=null ? startdate : new date() 

update ideally write custom expression provide e.g. start of current week or end of current month if date not specified

as explain here https://stackoverflow.com/a/22523299/636472:

you can handle case create behavior special word:

@initbinder public void initbinder(webdatabinder binder) throws exception {     final dateformat df = new simpledateformat("yyyy-mm-dd");     final customdateeditor dateeditor = new customdateeditor(df, true) {         @override         public void setastext(string text) throws illegalargumentexception {             if ("today".equals(text)) {                 setvalue(new date());             } else {                 super.setastext(text);             }         }     };     binder.registercustomeditor(date.class, dateeditor); } 

---

@requestparam(required = false, defaultvalue = "today") date startdate