Pass a string from javascript to java spring mvc

[Voldemort2]

I am trying to add a data(string) to a url in javascript and pass to java controller. In server side i am using spring mvc. The javascript code below redirects to the save.htm with the data concatenated. I couldnt figure out how to catch. Is there any way to pass this 'str' to java? I'd really appreciate any help

window.location.replace("save.htm?mess="+str);