javaweb服务端获取客户端真实IP地址

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javaweb服务端获取客户端真实IP地址

 

      前面有篇博文讲了获取本机或服务端的IP地址和MAC地址，但是无法获取客户端的真实IP地址。这篇博文我们通过代码来实现获取客户端的真实IP地址。

      获取本机或服务端的IP地址和MAC地址博文链接： https://blog.youkuaiyun.com/IT_Most/article/details/109313606

 

1 工具类IpUtil.java

import javax.servlet.http.HttpServletRequest;
import lombok.extern.slf4j.Slf4j;

@Slf4j
public class IpUtil {

  private static final String LOOPBACK_ADDRESS = "127.0.0.1";
  private static final String IPV6_ADDRESS = "0:0:0:0:0:0:0:1";

  /**
   * 通过HttpServletRequest返回客户端真实IP地址（通过多级代理后也能获取到真实ip）
   */
  public static String getIpAddr(HttpServletRequest request) {
    try {
      String ip = request.getHeader("x-forwarded-for");
      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.getRemoteAddr();
      }
      //如果使用localhost访问，对于windows IPv6会返回0:0:0:0:0:0:0:1，将其转为127.0.0.1
      if (IPV6_ADDRESS.equals(ip)) {
        ip = LOOPBACK_ADDRESS;
      }
      return ip;
    } catch (Exception e) {
      log.error("getIpAddr error! e:", e);
    }
    return "";
  }
}

 

2 测试代码

  @GetMapping("ip")
  @ResponseBody
  public String mac(HttpServletRequest request) {
    String ip = IpUtil.getIpAddr(request);
    return "ip:" + ip;
  }

 

3 测试结果

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