得到Xml中元素的值

<?xml version="1.0" encoding="utf-8" ?>
<Response service="RouteService">
<Head>OK</Head>
<Body>
<RouteResponse mailno="249269444755">
<Route @body="30" />
</RouteResponse>
</Body>
</Response>

我要是想获取到@body的值

xmlElement=<Route @body="30" /> 就 element.getAttribute("@Body")