提供一個獲取ip地址的工具類
package com.leo.util;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
* @ClassName: HttpUtil
* @Description: 獲取請求主機IP地址,如果通過代理進來,則透過防火牆獲取真實IP地址;
* @Author: leo825
* @Date: 2020-06-04 23:02
* @Version: 1.0
*/
public class HttpUtil {
//日誌文件
private static final Logger logger = LogManager.getLogger();
//獲取真實IP地址
public final static String getIpAddr(HttpServletRequest request) throws IOException {
// 獲取請求主機IP地址,如果通過代理進來,則透過防火牆獲取真實IP地址
String ip = request.getHeader("X-Forwarded-For");
if (logger.isInfoEnabled()) {
logger.info("X-Forwarded-For - String ip=" + ip);
}
//如果以上獲取的的ip是空的或者是unknown
if (ip == null || ip.trim().length() == 0 || "unknown".equalsIgnoreCase(ip)) {
if (ip == null || ip.trim().length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
if (logger.isInfoEnabled()) {
logger.info("Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.trim().length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
if (logger.isInfoEnabled()) {
logger.info("WL-Proxy-Client-IP - String ip=" + ip);
}
}
if (ip == null || ip.trim().length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
if (logger.isInfoEnabled()) {
logger.info("HTTP_CLIENT_IP - String ip=" + ip);
}
}
if (ip == null || ip.trim().length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
if (logger.isInfoEnabled()) {
logger.info("HTTP_X_FORWARDED_FOR - String ip=" + ip);
}
}
if (ip == null || ip.trim().length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
if (logger.isInfoEnabled()) {
logger.info("getRemoteAddr - String ip=" + ip);
}
}
} else if (ip.trim().length() > 15) {
//如果獲取到多個IP
String[] ips = ip.split(",");
for (int index = 0; index < ips.length; index++) {
String strIp = ips[index];
if (ip != null && ip.trim().length() != 0 && !("unknown".equalsIgnoreCase(strIp))) {
ip = strIp;
break;
}
}
}
return ip;
}
}