在Jsp中调用静态资源，路径配置问题,jsp获取路径的一些方法

mac2022-06-30 82

在Jsp中调用图片、JS脚本等，针对取得的路径有两种调用方式：

1、放入Body中生成绝对路径（不建议）

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head> <title>image调用</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head><body> <h1>图片访问</h1> <div> <img alt="图片" src="<%=basePath%>/image/a.png"> </div></body></html>

2、在Head中指定，Body中使用相对路径（建议）

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head> <title>image调用</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  <base href=" <%=basePath%>"> </head><body> <h1>图片访问</h1> <div> <img alt="图片" src="image/a.png"> </div></body></html>

转载自：https://www.cnblogs.com/maocs/p/4256302.html

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();

以上转自：http://www.cnblogs.com/JemBai/archive/2010/11/10/1873764.html

转载于:https://www.cnblogs.com/kanyun/p/8296830.html

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