jsp Request获取url信息的各种方法对比

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>"); 

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 

request.getRealPath("url");//虚拟目录映射为实际目录 request.getRealPath("./");//网页所在的目录 request.getRealPath("../");//网页所在目录的上一层目录 

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/ 

ServletContext.getRealPath(java.lang.String) instead. request.getSession().getServletContext().getRealPath() 得到工程文件的实际物理路径,也就是绝对地址 

//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=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(); 

 String queryString = request.getQueryString(); ring fullPath = url + queryString;  // 或者是url_buffer.toString()+queryString;