HttpServletRequest获取URL、URI

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

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 test extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); PrintWriter out = response.getWriter(); String getContextPath = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+getContextPath+"/"; String getRemoteAddress=request.getRemoteAddr(); String getServletPath =request.getServletPath(); String getServletContext_getRealPath =request.getServletContext.getRealPath("/"); String getRequestURL =request.getRequestURL().toString(); String getRequestURI =request.getRequestURI(); String getQueryString =request.getQueryString(); String getRemoteUser =request.getRemoteUser(); out.println("getContextPath:"+ getContextPath +"<br>"); out.println("basePath:"+basePath+"<br>"); out.println("getRemoteAddress:"+ getRemoteAddress +"<br>"); out.println("getServletPath:"+ getServletPath +"<br>"); out.println("getServletContext_getRealPath:"+ getServletContext_getRealPath +"<br>"); out.println("getRequestURL:"+ getRequestURL +"<br>"); out.println("getRequestURI:"+ getRequestURI +"<br>"); out.println("getQueryString:"+ getQueryString +"<br>"); out.println("getRemoteUser:"+ getRemoteUser +"<br>"); } }

结果： 

getContextPath:/WebDemo 

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

getRemoteAddress:127.0.0.1 

getServletPath:/ welcome.jsp 

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

getRequestURL: http://localhost:8683/WebDemo/welcome.jsp 

getRequestURI:/WebDemo/welcome.jsp 

getRequestQueryString: userName=Jhon

getRemoteUser:null  

注意：request.getServletContext().getRealPath("/")等价于request.getRealPath("/")，但是request.getRealPath("/")方法现在已经被移除。

原文链接：https://www.cnblogs.com/SaraMoring/p/5708058.html