第一种直接用java自带的InetAddress类：

import java.net.InetAddress;import java.text.SimpleDateFormat;import java.util.Date; public class test{ public static void main(String[] args) throws Exception{ InetAddress addr = InetAddress.getLocalHost(); String ip=addr.getHostAddress();//获得本机IP String address=addr.getHostName();//获得本机名称 Date d = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String dateNowStr = sdf.format(d); System.out.println("IP: "+ip+" Name: "+address+" Time: "+dateNowStr); } }

输出结果如下：

第二种根据Web request请求获取：

package demo.login; import ins.framework.web.Struts2Action;import java.text.SimpleDateFormat;import java.util.Date;import javax.servlet.http.HttpServletRequest;import java.net.InetAddress; @SuppressWarnings("serial")public class LoginAction extends Struts2Action { public String login() { HttpServletRequest request=this.getRequest(); this.getIpAddress(request); return SUCCESS; } public void getIpAddress(HttpServletRequest request) { String ip = request.getHeader("x-forwarded-for"); System.out.println("x-forwarded-for ip: " + ip); if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) { // 多次反向代理后会有多个ip值，第一个ip才是真实ip if( ip.indexOf(",")!=-1 ){ ip = ip.split(",")[0]; } } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("Proxy-Client-IP"); System.out.println("Proxy-Client-IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("WL-Proxy-Client-IP"); System.out.println("WL-Proxy-Client-IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_CLIENT_IP"); System.out.println("HTTP_CLIENT_IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_X_FORWARDED_FOR"); System.out.println("HTTP_X_FORWARDED_FOR ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("X-Real-IP"); System.out.println("X-Real-IP ip: " + ip); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getRemoteAddr(); System.out.println("getRemoteAddr ip: " + ip); } //获取本地ip if("0:0:0:0:0:0:0:1".equals(ip)){ try { ip = InetAddress.getLocalHost().getHostAddress(); } catch (UnknownHostException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("getLocal ip: " + ip); } Date d = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String dateNowStr = sdf.format(d); System.out.println("登录IP: " + ip+"登录时间:"+dateNowStr); } }

本地会输出：

服务器端如下：

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