良葛格的DWR教學:
http://www.javaworld.com.tw/jute/post/view?bid=49&id=165881&sty=1&tpg=1&age=0

如果使用dwr.jar 是3.0的
在自訂議的js 要在engine.js的後面
<script language=Javascript src="<c:out value='${pageContext.request.contextPath}'/>/dwr/engine.js"></script>
<script language=Javascript src="<c:out value='${pageContext.request.contextPath}'/>/dwr/util.js"></script>
<script language=Javascript src="<c:out value='${pageContext.request.contextPath}'/>/dwr/interface/XXXX.js"></script>