RequestListener 学习笔记-记录来访者IP
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JavaScript
import java.util.HashMap;import java.util.Map;import javax.servlet.ServletRequestEvent;import javax.servlet.ServletRequestListener;import javax.servlet.http.HttpServletRequest;public class CallListener implements ServletRequestListener { private static Map<String, String> map = new HashMap<String, String>(); // 实例变量 private int counter; static { map.put("127.0.0.1", "北京"); map.put("192.168.11.96", "深圳"); map.put("192.168.11.113", "中山"); map.put("192.168.11.124", "珠海"); } @Override public void requestInitialized(ServletRequestEvent sre) { // 取得事件源,即ServletRequest对象 HttpServletRequest request = (HttpServletRequest) sre .getServletRequest(); // 取得客户端IP String ip = request.getRemoteAddr(); // 通过ip查询归属地 String address = map.get(ip); if (address == null) { address = "北京"; } // 通过ip查询归属地 request.setAttribute("ip", ip); request.setAttribute("address", address); } @Override public void requestDestroyed(ServletRequestEvent sre) { }}index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> 您的IP地址：${ip }<br/> 归属地：${requestScope.address}<br/> </body></html>
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