java 获取IP地址

淹死的鱼o0

于 2018-09-13 16:39:19 发布

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分类专栏： java 常用小工具

本文链接：https://blog.youkuaiyun.com/qq_28546451/article/details/82690512

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public static String getIpAddr(HttpServletRequest request) {
            // 参考http://dpn525.iteye.com/blog/1132318
             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(); 
              }
              if (IP != null) {
                  if (IP.equals("0:0:0:0:0:0:0:1")) {
                      IP = "127.0.0.1";
                  } else {
                      String[] ips = IP.split(",");
                      for (String ip: ips){// 第一个就应该是客户端真实IP
                          IP = ip.trim();
                          if (IP.length()<=15) {
                              IP = ip;
                          }
                          if (!(IP.startsWith("192.")) && !(IP.startsWith("10."))) {
                              break;
                          }
                      }
                  }
              }
              return IP;
            }