获取IP地址方法

//获取IP地址方法
     String ipAddress = request.getHeader("x-forwarded-for"); 
              if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { 
                      ipAddress = request.getHeader("Proxy-Client-IP"); 
              } 
              if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { 
                      ipAddress = request.getHeader("WL-Proxy-Client-IP"); 
              } 
              if(ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) { 
                      ipAddress = request.getRemoteAddr(); 
                      if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){ 
                              //根据网卡取本机配置的IP 
                              InetAddress inet=null; 
                              try { 
                                  inet = InetAddress.getLocalHost(); 
                              } catch (UnknownHostException e) { 
                                  e.printStackTrace(); 
                              } 
                              ipAddress= inet.getHostAddress(); 
                      } 
                  } 
                  //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割 
                  if(ipAddress!=null && ipAddress.length()>15){ //"***.***.***.***".length() = 15 
                      if(ipAddress.indexOf(",")>0){ 
                          ipAddress = ipAddress.substring(0,ipAddress.indexOf(",")); 
                      } 
                  } 
                 user.setLastLoginIP(ipAddress);