【struts】標準validator:requiredifの使い方 http://www.google.co.jp/search?q=cache:OKKGCSPvUi0J:www.doblog.com/weblog/myblog/3710%3FYEAR%3D2004%26MONTH%3D1%26DAY%3D31+requiredif+fieldTest&hl=ja&lr=lang_ja&inlang=ja