在jsp中用JSP和JSTL获取服务器参数

JSP方式<br/>
<%
String SERVER_NAME = request.getServerName();
String SERVER_SOFTWARE = getServletContext().getServerInfo();
String SERVER_PROTOCOL = request.getProtocol();
Integer SERVER_PORT = request.getServerPort();
String REQUEST_METHOD = request.getMethod();
String PATH_INFO = request.getPathInfo();
String PATH_TRANSLATED = request.getPathTranslated();
String SCRIPT_NAME = request.getServletPath();
String DOCUMENT_ROOT = request.getRealPath("/");
String QUERY_STRING = request.getQueryString();
String REMOTE_HOST = request.getRemoteHost();
String REMOTE_ADDR = request.getRemoteAddr();
String AUTH_TYPE = request.getAuthType();
String REMOTE_USER = request.getRemoteUser();
String CONTENT_TYPE = request.getContentType();
Integer CONTENT_LENGTH = request.getContentLength();
String HTTP_ACCEPT = request.getHeader("Accept");
String HTTP_USER_AGENT = request.getHeader("User-Agent");
String HTTP_REFERER = request.getHeader("Referer");

HashMap infoMap = new HashMap();
infoMap.put("SERVER_NAME", SERVER_NAME);
infoMap.put("SERVER_SOFTWARE", SERVER_SOFTWARE);
infoMap.put("SERVER_PROTOCOL", SERVER_PROTOCOL);
infoMap.put("SERVER_PORT", SERVER_PORT);
infoMap.put("REQUEST_METHOD", REQUEST_METHOD);
infoMap.put("PATH_INFO", PATH_INFO);
infoMap.put("PATH_TRANSLATED", PATH_TRANSLATED);
infoMap.put("SCRIPT_NAME", SCRIPT_NAME);
infoMap.put("DOCUMENT_ROOT", DOCUMENT_ROOT);
infoMap.put("QUERY_STRING", QUERY_STRING);
infoMap.put("REMOTE_HOST", REMOTE_HOST);
infoMap.put("REMOTE_ADDR", REMOTE_ADDR);
infoMap.put("AUTH_TYPE", AUTH_TYPE);
infoMap.put("REMOTE_USER", REMOTE_USER);
infoMap.put("CONTENT_TYPE", CONTENT_TYPE);
infoMap.put("CONTENT_LENGTH", CONTENT_LENGTH);
infoMap.put("HTTP_ACCEPT", HTTP_ACCEPT);
infoMap.put("HTTP_USER_AGENT", HTTP_USER_AGENT);
infoMap.put("HTTP_REFERER", HTTP_REFERER);
Iterator it = infoMap.keySet().iterator();
%>

<%
while (it.hasNext()) {
Object o = it.next();
%>
　　<%=o%>
　　<%=infoMap.get(o)%>
　　<% out.println("<br>"); }%>
<br/>
====================================================

JSTL方式<br/>
${pageContext.request}                  |取得请求对象<br>
${pageContext.session}                  |取得session对象<br>
${pageContext.request.queryString}      |取得请求的参数字符串<br>
${pageContext.request.requestURL}       |取得请求的URL，但不包括请求之参数字符串<br>
${pageContext.request.contextPath}      |服务的web application的名称<br>
${pageContext.request.method}           |取得HTTP的方法(GET、POST)<br>
${pageContext.request.protocol}         |取得使用的协议(HTTP/1.1、HTTP/1.0)<br>
${pageContext.request.remoteUser}       |取得用户名称<br>
${pageContext.session.new}              |判断session是否为新的，所谓新的session，表示刚由server产生而client尚未使用<br>
${pageContext.session.id}               |取得session的ID<br>

${header["User-Agent"]}					|用户浏览器的版本<br/>
${header["Host"]}						|IP<br/>
${pageContext.request.remoteAddr }      |取得用户的IP地址<br>
${pageContext.servletContext.serverInfo}|取得主机端的服务信息<br>
${pageContext.request.serverPort}		|端口信息<br>
${pageContext.request.serverName}		|服务器名称<br>
${pageContext.request.remoteHost}		|客户机名称<br>

<%
String path = request.getContextPath();  
request.setAttribute("path", path);
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  

%>

<link rel="stylesheet" href="<%=path%>/resource/css/style.css" />

<link rel="stylesheet" href="${path}/resource/css/style.css" /> 

<link rel="stylesheet" href="${pageContext.request.contextPath}/resource/css/style.css" />