Java实现IP地址获取工具类

客官°小女子只卖身不卖艺 2021-07-24 14:40 703阅读 1赞

# 一 点睛 #

获取IP地址是我们常常需要实现的一个功能，在此提供一下工具类。

# 二 代码 #

1 工具类

package com.imooc.demo.common.util;
    
    import javax.servlet.http.HttpServletRequest;
    
    /**
    * @className: RequestIpUtils
    * @description: 获取用户真实IP
    * @date: 2020/8/20
    * @author: cakin
    */
    public class RequestIpUtils {
       
        /**
         * 功能描述：获取用户真实IP
         *
         * @author cakin
         * @date 2020/8/20
         * @param request 请求
         * @return String IP地址
         */
        public static String getIpAddr(HttpServletRequest request) {
            String ip = request.getHeader("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 = 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.getHeader("X-Real-IP");  
            }  
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {  
                ip = request.getRemoteAddr();  
            }
            return ip;  
        }
    }

2 测试类

@RequestMapping("/hello")
    public String hello(HttpServletRequest req) {
        // 获取IP地址
        String ipAddr = RequestIpUtils.getIpAddr(req);
        System.out.println(ipAddr);
        return "hello Jenkins！Great！good！";
    }

# 三 测试结果 #

1 浏览器输入： [http://127.0.0.1:8888/hello][http_127.0.0.1_8888_hello]

2 控制台输出：127.0.0.1

[http_127.0.0.1_8888_hello]: http://127.0.0.1:8888/hello