JSP和JSTL获取服务器参数示例

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
<head> 
<title>JSP和JSTL获取服务器参数</title> 
</head> 
<body> 
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> 
</body> 
</html> 