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

2017-11-07 10:29 92 查看

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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