java:获取用户ip工具类

java:获取用户ip工具类 代码中直接调用即可

import javax.servlet.http.HttpServletRequest;import java.net.InetAddress;import java.net.UnknownHostException;public class IPUtil {    public static String getIpAddr(HttpServletRequest request) { String ipAddress = null; try {     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")) {      // 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(","));  }     } } catch (Exception e) {     ipAddress=""; } // ipAddress = this.getRequest().getRemoteAddr(); return ipAddress;    }}