关于request获取路径的几个参数实例

从Request对象中可以获取各种路径信息，以下例子：
假设请求的页面是index.jsp,项目是WebDemo，则在index.jsp中获取有关request对象的各种路径信息如下

String path = request.getContextPath();
String basePath =request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
String remoteAddress=request.getRemoteAddr();
String servletPath=request.getServletPath();
String realPath=request.getRealPath("/");
String remoteUser=request.getRemoteUser();
String requestURI=request.getRequestURI();

out.println("path:"+path+"<br>");
out.println("basePath:"+basePath+"<br>");
out.println("remoteAddr:"+remoteAddress+"<br>");
out.println("servletPath:"+servletPath+"<br>");
out.println("realPath:"+realPath+"<br>");
out.println("remoteUser:"+remoteUser+"<br>");
out.println("requestURI:"+requestURI+"<br>");

结果：
path:/WebDemo

basePath:http://localhost:8683/WebDemo/

remoteAddr:127.0.0.1

servletPath:/index.jsp

realPath:D:\apache-tomcat-6.0.13\webapps\WebDemo\

remoteUser:null

requestURI:/WebDemo/index.jsp

从上不难看出request各个对应方法所代表的含义