getPathInfo() getServletPath() getContextPath() getRequestURL() getRequestURI()

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day117为项目名

1.在servlet中访问

(一) web.xml

 <servlet>    <servlet-name>Aservlet</servlet-name>    <servlet-class>day117.Aservlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>Aservlet</servlet-name>    <url-pattern>/test/*</url-pattern>  </servlet-mapping>

(二) servlet

package day117;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class Aservlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html");PrintWriter out = response.getWriter();String pathInfo = request.getPathInfo();System.out.println("pathInfo:"+pathInfo);String servletPath = request.getServletPath();System.out.println("servletPath:"+servletPath);String contextPath = request.getContextPath();System.out.println("contextPath:"+contextPath);StringBuffer requestURL = request.getRequestURL();System.out.println("requestURL:"+requestURL);String requestURI = request.getRequestURI();System.out.println("requestURi:"+requestURI);}public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doGet(request, response);}}

(三) 运行结果

访问 http://localhost/day117/test/hello/world?name=jack

pathInfo:/hello/world
servletPath:/test
contextPath:/day117
requestURL:http://localhost/day117/test/hello/world
requestURi:/day117/test/hello/world

2.在jsp中访问

path.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">        <title>My JSP 'index.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><!--<link rel="stylesheet" type="text/css" href="styles.css">-->  </head>    <body>  <%    String pathInfo = request.getPathInfo();System.out.println("pathInfo:"+pathInfo);String servletPath = request.getServletPath();System.out.println("servletPath:"+servletPath);String contextPath = request.getContextPath();System.out.println("contextPath:"+contextPath);StringBuffer requestURL = request.getRequestURL();System.out.println("requestURL:"+requestURL);String requestURI = request.getRequestURI();System.out.println("requestURi:"+requestURI);            %>  </body></html>

(三) 运行结果

访问 http://localhost/day117/path.jsp?name=jack

pathInfo:null
servletPath:/path.jsp
contextPath:/day117
requestURL:http://localhost/day117/path.jsp
requestURi:/day117/path.jsp

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