关于servlet的问题

Question

在jsp页面上面有这样的代码：
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>基本上有些是在api上面查不到的，求高手解释方法意思。顺便，给个完整的servlet的api文档吧，谢谢

Answer 1

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

request.getContextPath() 获取你工程的名字，如testWeb
request.getScheme() 获取Scheme 如Http or Https
request.getServerName() 获取主机server的host 如localhost等
request.getServerPort() 获取主机server的端口