import javax.servlet.http.HttpServletRequest; public class ClientInfoUtil{ /** * 获得客户端的IP地址 * @param request * @return */ static public String getIP(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; } /** * 获得客户端访问服务器的url地址 * @param request * @return */ static public String getURL(HttpServletRequest request) {     String url = request.getScheme()+"://";       url+=request.getHeader("host");       url+=request.getRequestURI();       if(request.getQueryString()!=null)  {         url+="?"+request.getQueryString();       }     return url; } }