获取当前访问客户端的真实IP地址，辨别是否为内网？

来源：互联网发布：智商和情商知乎编辑：程序博客网时间：2024/06/12 01:27

Test.jsp 测试页面

TestAddress tsetadres = new TestAddress();

String addIP = request.getRemoteAddr();

if(!addIP.equals(""))
{
  String relIp = tsetadres.getIpAddr(request);
  boolean isTrue = tsetadres.isInnerIP(relIp);
  if(isTrue == true)
  {
   //内网
  ......

  }
  else
  {
   //外网
  ........

}
}

TestAddress.java 测试类

public class TestAddres {

//获取客户端真实的IP
public String getIpAddr(HttpServletRequest request) {
     String ip = request.getHeader("x-forwarded-for");
     if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)
                   || "null".equalsIgnoreCase(ip))    {
         ip = request.getHeader("Proxy-Client-IP");
     }
     if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)
                   || "null".equalsIgnoreCase(ip)) {
         ip = request.getHeader("WL-Proxy-Client-IP");
     }
     if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)
                   || "null".equalsIgnoreCase(ip)) {
         ip = request.getRemoteAddr();
     }
     return ip;
}

//判断客户端IP地址是否为内网地址
public boolean isInnerIP(String ipAddress){
        boolean isInnerIp = false;
        long ipNum = getIpNum(ipAddress);
        /**
        私有IP：

               A类 10.0.0.0-10.255.255.255
               B类 172.16.0.0-172.31.255.255
               C类 192.168.0.0-192.168.255.255
        **/
        long aBegin = getIpNum("10.0.0.0");
        long aEnd = getIpNum("10.255.255.255");
        long bBegin = getIpNum("172.16.0.0");
        long bEnd = getIpNum("172.31.255.255");
        long cBegin = getIpNum("192.168.0.0");
        long cEnd = getIpNum("192.168.255.255");
        isInnerIp = isInner(ipNum,aBegin,aEnd) || isInner(ipNum,bBegin,bEnd) || isInner(ipNum,cBegin,cEnd) || ipAddress.equals("127.0.0.1");   //访问本地localhost获取为127.0.0.1
        return isInnerIp;
}

private static long getIpNum(String ipAddress) {
     String [] ip = ipAddress.split("//.");
     long a = Integer.parseInt(ip[0]);
     long b = Integer.parseInt(ip[1]);
     long c = Integer.parseInt(ip[2]);
     long d = Integer.parseInt(ip[3]);

     long ipNum = a * 256 * 256 * 256 + b * 256 * 256 + c * 256 + d;
     return ipNum;
}

private static boolean isInner(long userIp,long begin,long end){
return (userIp>=begin) && (userIp<=end);
}

}