springboot作为后台代码，获取到的登录IP是前台的代理服务器地址，并不是用户的真实IP地址，让我们在做统计的时候无从下手。下面是一个后台获取IP地址的类，本质上没有什么问题，问题在于，Nginx给你的就是一个代理之后的地址，所以你当然获取不到真实的地址了。
package com.**.common.core.utils.ip;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.servlet.http.HttpServletRequest;
import com.**.common.core.utils.StringUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.server.reactive.ServerHttpRequest;
/**
- 获取IP方法
- @author Hxhh
/public class IpUtils{/*
- 获取客户端IP
- @param request 请求对象
- @return IP地址
*/
public static String getIpAddr(HttpServletRequest request)
{
if (request == null)
{
return "unknown";
}
String ip = request.getHeader("x-forwarded-for");
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
{
ip = request.getHeader("Proxy-Client-IP");
}
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("WL-Proxy-Client-IP");
}
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 "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : getMultistageReverseProxyIp(ip);
}
public static String getIpAddr(ServerHttpRequest request) {
HttpHeaders headers = request.getHeaders();
String ip = headers.getFirst("x-forwarded-for");
if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
// 多次反向代理后会有多个ip值，第一个ip才是真实ip
if (ip.indexOf(",") != -1) {
ip = ip.split(",")[0];
}
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = headers.getFirst("Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = headers.getFirst("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = headers.getFirst("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = headers.getFirst("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = headers.getFirst("X-Real-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddress().getAddress().getHostAddress();
}
return ip;
}
/**
- 检查是否为内部IP地址
- @param ip IP地址
- @return 结果
/**
- 检查是否为内部IP地址
- @param addr byte地址
- @return 结果
/**
- 将IPv4地址转换成字节
- @param text IPv4地址
- @return byte 字节
*/
public static byte[] textToNumericFormatV4(String text)
{
if (text.length() == 0)
{
return null;
}
byte[] bytes = new byte[4];
String[] elements = text.split("\.", -1);
try
{
long l;
int i;
switch (elements.length)
{
case 1:
l = Long.parseLong(elements[0]);
if ((l < 0L) || (l > 4294967295L))
{
return null;
}
bytes[0] = (byte) (int) (l >> 24 & 0xFF);
bytes[1] = (byte) (int) ((l & 0xFFFFFF) >> 16 & 0xFF);
bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
bytes[3] = (byte) (int) (l & 0xFF);
break;
case 2:
l = Integer.parseInt(elements[0]);
if ((l < 0L) || (l > 255L))
{
return null;
}
bytes[0] = (byte) (int) (l & 0xFF);
l = Integer.parseInt(elements[1]);
if ((l < 0L) || (l > 16777215L))
{
return null;
}
bytes[1] = (byte) (int) (l >> 16 & 0xFF);
bytes[2] = (byte) (int) ((l & 0xFFFF) >> 8 & 0xFF);
bytes[3] = (byte) (int) (l & 0xFF);
break;
case 3:
for (i = 0; i < 2; ++i)
{
l = Integer.parseInt(elements[i]);
if ((l < 0L) || (l > 255L))
{
return null;
}
bytes[i] = (byte) (int) (l & 0xFF);
}
l = Integer.parseInt(elements[2]);
if ((l < 0L) || (l > 65535L))
{
return null;
}
bytes[2] = (byte) (int) (l >> 8 & 0xFF);
bytes[3] = (byte) (int) (l & 0xFF);
break;
case 4:
for (i = 0; i < 4; ++i)
{
l = Integer.parseInt(elements[i]);
if ((l < 0L) || (l > 255L))
{
return null;
}
bytes[i] = (byte) (int) (l & 0xFF);
}
break;
default:
return null;
}
}
catch (NumberFormatException e)
{
return null;
}
return bytes;
}
/**
- 获取IP地址
- @return 本地IP地址
/**
- 获取主机名
- @return 本地主机名
/**
- 从多级反向代理中获得第一个非unknown IP地址
- @param ip 获得的IP地址
- @return 第一个非unknown IP地址
/**
- 检测给定字符串是否为未知，多用于检测HTTP请求相关
- @param checkString 被检测的字符串
- @return 是否未知
1、没有代理
如果只是普通的web项目的话，通过 request.getRemoteAddr(); （HttpServletRequest 类型） 即可获取到客户端的真实IP
2、Nginx代理
在有代理的情况下，由于任何请求首先经过Nginx，故通过request.getRemoteAddr()获取的其实是Nginx的IP，并非真实的客户端IP;此时通过x-forwarded-for获取的IP为："客户端，代理1，代理2，..."或者"伪造IP,客户端，代理1，代理2，..."，故不能获取到准确的客户端IP，此时需要配置Nginx TCP客户端连接的真实IP，通过代理配置获取真实IP，可以通过$remote_addr获取客户端IP，Nginx配置如下：
location / {
//追加如下代码
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
