java后台获取本地ip,访问ip,访问mac地址

InetAddress addr = InetAddress.getLocalHost();

System.out.println("获取本地ip方法:"+addr.getHostAddress());

System.out.println("获取外网访问ip方法一:"+request.getRemoteAddr());

String ipstr = request.getHeader("x-forwarded-for"); 
   if (ipstr == null || ipstr.length() == 0 || "unknown".equalsIgnoreCase(ipstr)) { 
     ipstr = request.getHeader("Proxy-Client-IP"); 
   } 
   if (ipstr == null || ipstr.length() == 0 || "unknown".equalsIgnoreCase(ipstr)) { 
     ipstr = request.getHeader("WL-Proxy-Client-IP"); 
   } 
   if (ipstr == null || ipstr.length() == 0 || "unknown".equalsIgnoreCase(ipstr)) { 
     ipstr = request.getHeader("HTTP_CLIENT_IP"); 
   } 
   if (ipstr == null || ipstr.length() == 0 || "unknown".equalsIgnoreCase(ipstr)) { 
     ipstr = request.getHeader("HTTP_X_FORWARDED_FOR"); 
   } 
   if (ipstr == null || ipstr.length() == 0 || "unknown".equalsIgnoreCase(ipstr)) { 
     ipstr = request.getRemoteAddr(); 
   } 
   System.out.println("获取外网访问ip方法二:"+ipstr);

System.out.println("下面是获取Mac地址等很多相关信息");

}

*注意以上方法可能获取的是内外ip,这是因为你是内网测试的,你用外网ip访问就获取的是外网IP了