固定的ip才能访问的判断

<%
//定义可用ip
String ip[]={"192","168","0","31"};//改为固定ip

String[] addr=request.getRemoteAddr().split("\\.");
boolean isAdminIp=false;
if(addr[0].equals(ip[0])&&addr[1].equals(ip[1])&&addr[2].equals(ip[2])){   
	isAdminIp=true; 
}
%>