开发笔记:Java获取IP地址，IpUtils工具类，JavaIP地址获取

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
import javax.servlet.http.HttpServletRequest;
public class IpUtils {
private static final String[] HEADERS = {
"X-Forwarded-For",
"Proxy-Client-IP",
"WL-Proxy-Client-IP",
"HTTP_X_FORWARDED_FOR",
"HTTP_X_FORWARDED",
"HTTP_X_CLUSTER_CLIENT_IP",
"HTTP_CLIENT_IP",
"HTTP_FORWARDED_FOR",
"HTTP_FORWARDED",
"HTTP_VIA",
"REMOTE_ADDR",
"X-Real-IP"
};

/**
* 判断ip是否为空，空返回true
* @param ip
* @return
*/
public static boolean isEmptyIp(final String ip){
return (ip == null || ip.length() == 0 || ip.trim().equals("") || "unknown".equalsIgnoreCase(ip));
}


/**
* 判断ip是否不为空，不为空返回true
* @param ip
* @return
*/
public static boolean isNotEmptyIp(final String ip){
return !isEmptyIp(ip);
}

/***
* 获取客户端ip地址(可以穿透代理)
* @param request HttpServletRequest
* @return
*/
public static String getIpAddress(HttpServletRequest request) {
String ip = "";
for (String header : HEADERS) {
ip = request.getHeader(header);
if(isNotEmptyIp(ip)) {
break;
}
}
if(isEmptyIp(ip)){
ip = request.getRemoteAddr();
}
if(isNotEmptyIp(ip) && ip.contains(",")){
ip = ip.split(",")[0];
}
if("0:0:0:0:0:0:0:1".equals(ip)){
ip = "127.0.0.1";
}
return ip;
}


/**
* 获取本机的局域网ip地址，兼容Linux
* @return String
* @throws Exception
*/
public String getLocalHostIP() throws Exception{
Enumeration allNetInterfaces = NetworkInterface.getNetworkInterfaces();
String localHostAddress = "";
while(allNetInterfaces.hasMoreElements()){
NetworkInterface networkInterface = allNetInterfaces.nextElement();
Enumeration address = networkInterface.getInetAddresses();
while(address.hasMoreElements()){
InetAddress inetAddress = address.nextElement();
if(inetAddress != null && inetAddress instanceof Inet4Address){
localHostAddress = inetAddress.getHostAddress();
}
}
}
return localHostAddress;
}


}