Java如何获取真实请求IP
作者：Ocean@上源码
这篇文章主要介绍了Java如何获取真实请求IP问题,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教
java获取真实请求IP
在使用Nginx或Apache等代理的情况下，需要Nginx或Apache代替客户端去访问服务器。
当请求包经过反向代理后，在代理服务器这里这个IP数据包的IP包头做了修改，最终后端WEB服务器得到的数据包的头部源IP地址是代理服务器的IP地址。
这样一来，后端服务器的程序就无法获取用户的真实ip。
nginx中配置：
proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Real-Port $remote_port; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
Apache有代理的情况：
vi /usr/local/apache/conf/httpd.conf Include conf/extra/httpd-remoteip.conf vi /usr/local/apache/conf/extra/httpd-remoteip.conf LoadModule remoteip_module modules/mod_remoteip.so RemoteIPHeader X-Forwarded-For RemoteIPinternalProxy 127.0.0.1
- X-Real-IP 真实请求IP【Nginx中设置】
- X-Forwarded-For IP链，真实IP + , + 代理IP1.... + , + 代理IPN
- request.getRemoteAddr() 获取真实IP/代理IP（用户使用代理软件时无法获取真实IP）
真实请求IP
import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class IPUtil {
/**
* 真是请求IP
*
* @param request
* @return
*/
public static String getRealRequestIp(HttpServletRequest request) {
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("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
if (null != ip && ip.contains(",")) {
ip = ip.substring(0, ip.indexOf(","));
}
return ip;
}
}本机IP
import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class IPUtil {
/**
* 本机IP
*
* @return
* @throws UnknownHostException
*/
public static String getLocalIp() throws UnknownHostException {
return InetAddress.getLocalHost().getHostAddress();
}
}java获取发送请求的电脑的IP地址
客户端所有的请求信息都可以通过HttpServletRequest获得，获取客户端ip可以通过getRemoteAddr()获取。
但是如果客户端是通过代理访问我们的服务器，那么getRemoteAddr()获取到的ip就很有可能不是真实的ip，这时候我们可以通过请求头里的x-forwarded-for来获取真实的ip，请求每经一次代理，都会在后面拼接该代理的ip，以逗号分隔。
方法一
此方法获取真实IP（本机IP并不是127.0.0.1）
获取发送请求的电脑的IP地址，并返回
package com.lc.z.common.utils;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import javax.servlet.http.HttpServletRequest;
public class IpUtil {
/**
* 获取请求的ip
*/
public static String getRequestIp() {
RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
// 从获取RequestAttributes中获取HttpServletRequest的信息
HttpServletRequest request = (HttpServletRequest) requestAttributes.resolveReference(RequestAttributes.REFERENCE_REQUEST);
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("WL-Proxy-Client-IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
}方法二
RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes();
HttpServletRequest request = ((ServletRequestAttributes) requestAttributes).getRequest();
String clientIP = ServletUtil.getClientIP(request);
// 本地的服务输出 IP:127.0.0.1
System.out.println("IP:"+ clientIP);总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。