IpUtils.java
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package com.bsth.util;
import javax.servlet.http.HttpServletRequest;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
public class IpUtils {
/**
* 代理环境下只认X-Forwarded-For和X-Real-IP header，同时代理程序需要重写这两个header为原始IP
* 非代理环境只应该用request.getRemoteAddr()
* @param request
* @return
*/
public static String getIpAddr(HttpServletRequest request) {
if (request == null) {
return "unknown";
}
String ip = null;
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("X-Forwarded-For");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("X-Real-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
/**
* 获取本地IP地址
* @return
*/
public static String getLocalIpAddress() {
try {
Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
InetAddress ip = null;
while (allNetInterfaces.hasMoreElements()) {
NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
if (netInterface.isLoopback() || netInterface.isVirtual() || !netInterface.isUp() || "docker0".equals(netInterface.getDisplayName())) {
continue;
} else {
Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
while (addresses.hasMoreElements()) {
ip = addresses.nextElement();
if (ip != null && ip instanceof Inet4Address) {
return ip.getHostAddress();
}
}
}
}
} catch (Exception e) {
System.err.println("IP地址获取失败" + e.toString());
}
return "";
}
}