第二种代码:
public static String getIp(HttpServletRequest request) { String remoteAddr = request.getRemoteAddr(); String forwarded = request.getHeader("X-Forwarded-For"); String realIp = request.getHeader("X-Real-IP"); String ip = null; if (realIp == null) { if (forwarded == null) { ip = remoteAddr; } else { ip = remoteAddr + "/" + forwarded; } } else { if (realIp.equals(forwarded)) { ip = realIp; } else { ip = realIp + "/" + forwarded.replaceAll(", " + realIp, ""); } } return ip; } |
第三种代码:
public static String getIp2(HttpServletRequest request) { String ip = request.getHeader("X-Forwarded-For"); if(StringUtils.isNotEmpty(ip) && !"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 int index = ip.indexOf(","); if(index != -1){ return ip.substring(0,index); }else{ return ip; } } ip = request.getHeader("X-Real-IP"); if(StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)){ return ip; } return request.getRemoteAddr(); } |
第三种是最合适的，最清晰理解的
