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JSP和JSTL獲取服務器參數示例

編輯：關於JSP

復制代碼代碼如下:
<%@ 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獲取服務器參數</title>
</head>
<body>
JSP方式 
<%

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(" "); }%>
 

JSTL方式 
${pageContext.request} |取得請求對象 
${pageContext.session} |取得session對象 
${pageContext.request.queryString} |取得請求的參數字符串 
${pageContext.request.requestURL} |取得請求的URL，但不包括請求之參數字符串 
${pageContext.request.contextPath} |服務的web application的名稱 
${pageContext.request.method} |取得HTTP的方法(GET、POST) 
${pageContext.request.protocol} |取得使用的協議(HTTP/1.1、HTTP/1.0) 
${pageContext.request.remoteUser} |取得用戶名稱 
${pageContext.session.new} |判斷session是否為新的，所謂新的session，表示剛由server產生而client尚未使用 
${pageContext.session.id} |取得session的ID 

${header["User-Agent"]}|用戶浏覽器的版本 
${header["Host"]}|IP 
${pageContext.request.remoteAddr } |取得用戶的IP地址 
${pageContext.servletContext.serverInfo}|取得主機端的服務信息 
${pageContext.request.serverPort}|端口信息 
${pageContext.request.serverName}|服務器名稱 
${pageContext.request.remoteHost}|客戶機名稱 
</body>
</html>