java如何实现获取客户端ip地址的示例代码

package com.example.review.util;
 
import org.apache.commons.lang3.StringUtils;
import javax.servlet.http.HttpServletRequest;
 
/**
 * ip相关工具类
 *
 * @Author luoYong            
 * @Date 2022-03-30 17:16        
 */
public class IpUtils {
 
 
}

    /***
     * 获取客户端ip地址
     * @param request
     */
    public static String getIP(final HttpServletRequest request) throws Exception {
        if (request == null) {
            throw (new Exception("getIpAddr method HttpServletRequest Object is null"));
        }
        String ipStr = request.getHeader("x-forwarded-for");
        if (StringUtils.isBlank(ipStr) || "unknown".equalsIgnoreCase(ipStr)) {
            ipStr = request.getHeader("Proxy-Client-IP");
        }
        if (StringUtils.isBlank(ipStr) || "unknown".equalsIgnoreCase(ipStr)) {
            ipStr = request.getHeader("WL-Proxy-Client-IP");
        }
        if (StringUtils.isBlank(ipStr) || "unknown".equalsIgnoreCase(ipStr)) {
            ipStr = request.getRemoteAddr();
        }
 
        // 多个路由时，取第一个非unknown的ip
        final String[] arr = ipStr.split(",");
        for (final String str : arr) {
            if (!"unknown".equalsIgnoreCase(str)) {
                ipStr = str;
                break;
            }
        }
        //目的是将localhost访问对应的ip 0:0:0:0:0:0:0:1 转成 127.0.0.1。
        return ipStr.equals("0:0:0:0:0:0:0:1") ? "127.0.0.1" : ipStr;
    }