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java获取IP为0:0:0:0:0:0:0:1的情况

单调先生 2023-02-21 阅读 128


0:0:0:0:0:0:0:1是ipv6的表现形式,对应ipv4来说相当于127.0.0.1,也就是本机

访问时是通过 localhost 来访问,用java获取ip地址可能会出现该问题,这时获取的ip将是 0:0:0:0:0:0:0:1

要是机器在局域网中,访问时使用自己的ip访问,如 我的ip是 :192.168.2.177
访问url:http://192.168.2.177:8080

这时候请求会经过路由器转发,所以服务器获取的就是本机的局域网内ip,在java中获取的ip就是 192.168.2.177了

获取ip的方法工具类

package pers.adlered.voter.limit;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class IpUtil {
public static String getIpAddr(HttpServletRequest request) {
String ipAddress = null;
try {
ipAddress = request.getHeader("x-forwarded-for");
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getHeader("Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getHeader("WL-Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getRemoteAddr();
if (ipAddress.equals("127.0.0.1")) {
InetAddress inet = null;
try {
inet = InetAddress.getLocalHost();
} catch (UnknownHostException e) {
e.printStackTrace();
}
ipAddress = inet.getHostAddress();
}
}
if (ipAddress != null && ipAddress.length() > 15) {
if (ipAddress.indexOf(",") > 0) {
ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
}
}
} catch (Exception e) {
ipAddress = "";
}
return ipAddress;
}
}

HttpServletRequest request;
//ipAddr就是获取的ip
String ipAddr = IpUtil.getIpAddr(request);


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