getRequestURI,getRequestURL的区别

getRequestURI,getRequestURL的区别

test1.jsp=======================
<a href ="test.jsp?p=fuck">跳转到test2</a>
test2.jsp=======================
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
out.println("basePath:"+basePath);

out.println("<br/>");

out.println("getContextPath:"+request.getContextPath());

out.println("<br/>");

out.println("getServletPath:"+request.getServletPath());

out.println("<br/>");

out.println("getRequestURI:"+request.getRequestURI());

out.println("<br/>");

out.println("getRequestURL:"+request.getRequestURL());

out.println("<br/>");

out.println("getRealPath:"+request.getRealPath("/"));

out.println("<br/>");

out.println("getServletContext().getRealPath:"+getServletContext().getRealPath("/"));

out.println("<br/>");

out.println("getQueryString:"+request.getQueryString());
%>
 
显示结果：
basePath:http://localhost:8080/test/
getContextPath:/test 
getServletPath:/test.jsp 
getRequestURI:/test/test.jsp 
getRequestURL:http://localhost:8080/test/test.jsp 
getRealPath:D:\Tomcat 6.0\webapps\test\ 
getServletContext().getRealPath:D:\Tomcat 6.0\webapps\test\ 
getQueryString:p=fuck
在一些应用中，未登录用户请求了必须登录的资源时，提示用户登录，此时要记住用户访问的当前页面的URL，当他登录成功后根据记住的URL跳回用户最后访问的页面：
String lastAccessUrl = request.getRequestURL() + "?" + request.getQueryString();