解决SpringBoot通过nginx代理获取不了客户端的问题

客户端请求数据的数据的时候走了nginx的代理，被过滤了，需要手动配置conf方形。

在nginx.conf中server添加一下配置即可。

proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr; #保留代理之前的真实客户端ip
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 

在服务端通过Request获取到客户端真实的ip地址代码如下：

package com.dzu.alumni.uitl;

import com.dzu.alumni.pojo.IpVo;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.URL;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;

/**
 * IP工具类
 */
@Slf4j
public class IpUtil {
    /**
     * 获取访问者的ip地址
     * 注：要外网访问才能获取到外网地址，如果你在局域网甚至本机上访问，获得的是内网或者本机的ip
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0
                    || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0
                    || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getHeader("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0
                    || "unknown".equalsIgnoreCase(ipAddress)) {
                ipAddress = request.getRemoteAddr();
                if (ipAddress.equals("127.0.0.1")) {
                    // 根据网卡取本机配置的IP
                    InetAddress inet = null;
                    try {
                        inet = InetAddress.getLocalHost();
                    } catch (UnknownHostException e) {
                        e.printStackTrace();
                    }
                    ipAddress = inet.getHostAddress();
                }
            }
            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
                // = 15
                if (ipAddress.indexOf(",") > 0) {
                    ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
                }
            }
        } catch (Exception e) {
            ipAddress = "";
        }
        // ipAddress = this.getRequest().getRemoteAddr();

        return ipAddress;
    }
    /**
     * 调用太平洋网络IP地址查询Web接口（http://whois.pconline.com.cn/），返回ip、地理位置
     */
    public static IpVo getIpVo(String ip){
        //查本机
        String url = "http://whois.pconline.com.cn/ipJson.jsp?json=true";
        //查指定ip
        if(!StringUtils.isEmpty(ip)){
            url = "http://whois.pconline.com.cn/ipJson.jsp?json=true&ip=" + ip;
        }

        StringBuilder inputLine = new StringBuilder();
        String read;
        try {
            HttpURLConnection urlConnection = (HttpURLConnection) new URL(url).openConnection();
            urlConnection.setRequestProperty("Charset", "GBK");
            BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "GBK"));
            while ((read = in.readLine()) != null) {
                inputLine.append(read);
            }
            in.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        IpVo ipVo = null;
        try {
            ObjectMapper mapper = new ObjectMapper();
            //当属性的值为空（null或者""）时，不进行序列化，可以减少数据传输
            mapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
            //设置日期格式
            mapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
            //转换成IpVo
            ipVo = mapper.readValue(new String(inputLine.toString().getBytes("GBK"), "GBK"), IpVo.class);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return ipVo;
    }
    /**
     * 直接根据访问者的Request，返回ip、地理位置
     */
    public static IpVo getIpVoByRequest(HttpServletRequest request){
        return IpUtil.getIpVo(IpUtil.getIpAddr(request));
    }
}