import javax.servlet.http.HttpServletRequest;
import org.apache.log4j.Logger;
public final class InternetProtocol {
private static Logger log = Logger.getLogger(InternetProtocol.class); /** * 构造函数. */ private InternetProtocol() { } /** * 获取客户端IP地址.<br> * 支持多级反向代理 * * @param request * HttpServletRequest * @return 客户端真实IP地址 */ public static String getRemoteAddr(final HttpServletRequest request) { try{ String remoteAddr = request.getHeader("X-Forwarded-For"); // 如果通过多级反向代理，X-Forwarded-For的值不止一个，而是一串用逗号分隔的IP值，此时取X-Forwarded-For中第一个非unknown的有效IP字符串 if (isEffective(remoteAddr) && (remoteAddr.indexOf(",") > -1)) { String[] array = remoteAddr.split(","); for (String element : array) { if (isEffective(element)) { remoteAddr = element; break; } } } if (!isEffective(remoteAddr)) { remoteAddr = request.getHeader("X-Real-IP"); } if (!isEffective(remoteAddr)) { remoteAddr = request.getRemoteAddr(); } return remoteAddr; }catch(Exception e){ log.error("get romote ip error,error message:"+e.getMessage()); return ""; } } /** * 获取客户端源端口 * @param request * @return */ public static Long getRemotePort(final HttpServletRequest request){ try{ String port = request.getHeader("remote-port"); if( StringUtil.isNotEmptyString(port )) { try{ return Long.parseLong(port); }catch(NumberFormatException ex){ log.error("convert port to long error , port: "+port); return 0l; } }else{ return 0l; } }catch(Exception e){ log.error("get romote port error,error message:"+e.getMessage()); return 0l; } } /** * 远程地址是否有效. * * @param remoteAddr * 远程地址 * @return true代表远程地址有效，false代表远程地址无效 */ private static boolean isEffective(final String remoteAddr) { boolean isEffective = false; if ((null != remoteAddr) && (!"".equals(remoteAddr.trim())) && (!"unknown".equalsIgnoreCase(remoteAddr.trim()))) { isEffective = true; } return isEffective; }}
本地测试localhost会出现0:0:0:0:0:0:0:1
