html中获取工程路径：
<% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>
javaScript中获取工程路径
var localObj = window.location;
var contextPath = localObj.pathname.split("/")[1];
var basePath = localObj.protocol+"//"+localObj.host+"/"+contextPath;
java中获取工程路径
String path = ServletActionContext.getRequest().getRealPath(relativePath);