/**
 * 
 */
package com.ccit.ejtg.util;

import javax.servlet.http.HttpServletRequest;

/**
 * @描述 获得IP4
 * @author XYY
 * @time 2010-3-22上午09:06:14
 * @version 1.0
 * @类名 IP4.java
 */
public class IP4 {

    public static String getIP4(HttpServletRequest request){
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;

    }
}

------解决方案--------------------
	楼上的说得漏了好几种情况,某些情况下还是获取的不正确,我下面的比较全几乎涵盖了所有的客户端形式,完全可以使用

public static String getIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("X-Forwarded-For");
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_CLIENT_IP");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getHeader("HTTP_X_FORWARDED_FOR");
		}
		if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
			ip = request.getRemoteAddr();
		}
		return ip;
	}

------解决方案--------------------
探讨

楼上的说得漏了好几种情况,某些情况下还是获取的不正确,我下面的比较全几乎涵盖了所有的客户端形式,完全可以使用

public static String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("X-Forwarded-For");
if (ip == null || ip.length()……


------解决方案--------------------
探讨


如果是jsp直接用request，如果是servlet，用HttpServletRequest request