JSP Context 備忘 -- 抓取server Path 路徑

抓取server Path 路徑，我比較常用的二個方法


方法一(印出的時侯code比較短)
<%
String addr = request.getRemoteAddr();
int port = request.getServerPort();
String contextpath = request.getContextPath();
String path = "http://"+addr+":"+String.valueOf(port)+contextpath;
pageContext.setAttribute("path",path);
%>
${path} //印出

//方法二(一行搞到)
http://${pageContext.request.remoteAddr}:${pageContext.request.serverPort}