Java代碼??

從Request對象中可以獲取各種路徑信息，以下例子：??

假設請求的頁面是index.jsp,項目是WebDemo，則在index.jsp中獲取有關request對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各個對應方法所代表的含義??

Java代碼??

從request獲取各種路徑總結：??

request.getRealPath("url");//虛擬目錄映射為實際目錄??

request.getRealPath("./");//網頁所在的目錄??

request.getRealPath("../");//網頁所在目錄的上一層目錄??

假定你的web?application(web應用)名稱為news，你的瀏覽器中輸入請求路徑：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\??

現在request.getRealPath("/")?這個方法已經不推薦使用了??

可以使用??

ServletContext.getRealPath(java.lang.String)??instead.??

request.getSession().getServletContext().getRealPath()?得到工程文件的實際物理路徑,也就是絕對地址??

Java代碼??

??????//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=goExamSet&type=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=goExamSet&type=U??

??????StringBuffer?url_buffer?=?request.getRequestURL();??

??HttpServletRequest?的這兩種方法都只能得到不包含參數的請求url，區別如下：??

1?前者返回相對路徑，后者返回完整路徑??

2?前者返回string?，后者返回stringbuffer??

得到完整請求url可以通過如下方法，getQueryString()得到的是url后面的參數串，和前者相加就是帶參數的請求路徑了??

??String?queryString?=?request.getQueryString();??

ring?fullPath?=?url?+?queryString;???//?或者是url_buffer.toString()+queryString;?

總結

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