從Request對(duì)象中可以獲取各種路徑信息，以下例子：
假設(shè)請(qǐng)求的頁(yè)面是index.jsp,項(xiàng)目是WebDemo，則在index.jsp中獲取有關(guān)request對(duì)象的各種路徑信息如下
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
String remoteAddress=request.getRemoteAddr();
String servletPath=request.getServletPath();
String realPath=request.getRealPath("/");
String remoteUser=request.getRemoteUser();
String requestURI=request.getRequestURI();
out.println("path:"+path+"br>");
out.println("basePath:"+basePath+"br>");
out.println("remoteAddr:"+remoteAddress+"br>");
out.println("servletPath:"+servletPath+"br>");
out.println("realPath:"+realPath+"br>");
out.println("remoteUser:"+remoteUser+"br>");
out.println("requestURI:"+requestURI+"br>");
結(jié)果：
path:/WebDemo
basePath:http://localhost:8683/WebDemo/
remoteAddr:127.0.0.1
servletPath:/index.jsp
realPath:D:\apache-tomcat-6.0.13\webapps\WebDemo\
remoteUser:null
requestURI:/WebDemo/index.jsp
從上不難看出request各個(gè)對(duì)應(yīng)方法所代表的含義
從request獲取各種路徑總結(jié)：
request.getRealPath("url");//虛擬目錄映射為實(shí)際目錄
request.getRealPath("./");//網(wǎng)頁(yè)所在的目錄
request.getRealPath("../");//網(wǎng)頁(yè)所在目錄的上一層目錄
假定你的web application(web應(yīng)用)名稱為news，你的瀏覽器中輸入請(qǐng)求路徑：http://localhost:8080/uploading/load.jsp
request.getContextPath() => /uploading
request.getServletPath() => /load.jsp
request.getRequestURL() => http://localhost:8080/uploading/load.jsp
request.getRealPath("/") => F:\learn\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\uploading\
現(xiàn)在request.getRealPath("/") 這個(gè)方法已經(jīng)不推薦使用了
可以使用
ServletContext.getRealPath(java.lang.String) instead.
request.getSession().getServletContext().getRealPath() 得到工程文件的實(shí)際物理路徑,也就是絕對(duì)地址
//Returns the part of this request's URL from the protocol name up to the query string in the first line of the HTTP request
// eg./manage/editExam.domethod=goExamSettype=U
String url = request.getRequestURI();
//The returned URL contains a protocol, server name, port number, and server path, but it does not include query string parameters
//eg. http://127.0.0.1:8080/manage/editExam.domethod=goExamSettype=U
StringBuffer url_buffer = request.getRequestURL();
HttpServletRequest 的這兩種方法都只能得到不包含參數(shù)的請(qǐng)求url，區(qū)別如下：
1 前者返回相對(duì)路徑，后者返回完整路徑
2 前者返回string ，后者返回stringbuffer
得到完整請(qǐng)求url可以通過如下方法，getQueryString()得到的是url后面的參數(shù)串，和前者相加就是帶參數(shù)的請(qǐng)求路徑了
String queryString = request.getQueryString();
ring fullPath = url + queryString; // 或者是url_buffer.toString()+queryString;
以上就是小編為大家?guī)淼膉sp Request獲取url信息的各種方法對(duì)比的全部?jī)?nèi)容了，希望對(duì)大家有所幫助，多多支持腳本之家~
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