如何在 Java HttpServletRequest 中获取客户端 Ip 地址
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How to get client Ip Address in Java HttpServletRequest
提问by Samith Dilshan
I am trying to develop a Java web application (Servlet) which I need to get clients IP address.
我正在尝试开发一个需要获取客户端 IP 地址的 Java Web 应用程序 (Servlet)。
Following is my code so far:
以下是我到目前为止的代码：
String ipAddress = request.getRemoteAddr();
In this case most of the time I get the 'Default gateway address' (147.120.1.5). Not my machine IP address(174.120.100.17).
在这种情况下，大部分时间我都会得到“默认网关地址”（147.120.1.5）。不是我的机器 IP 地址 (174.120.100.17)。
String ipAddress = request.getHeader("X-FORWARDED-FOR");
if (ipAddress == null) {
ipAddress = request.getRemoteAddr();
}
In this case most of the time I get the 'Default gateway address' (147.120.1.5). Not my machine IP address (174.120.100.17).
在这种情况下，大部分时间我都会得到“默认网关地址”（147.120.1.5）。不是我的机器 IP 地址 (174.120.100.17)。
InetAddress IP=InetAddress.getLocalHost();
System.out.println(IP.getHostAddress());
In this case I got the server IP Address (147.120.20.1).
在这种情况下，我得到了服务器 IP 地址 (147.120.20.1)。
My IP address in 147.120.100.17. Now I don't know how to get the real client IP address.
我的 IP 地址在 147.120.100.17。现在我不知道如何获得真实的客户端IP地址。
Thank you very much.
非常感谢。
采纳答案by gihan-maduranga
Try this one,
试试这个，
String ipAddress = request.getHeader("X-FORWARDED-FOR");
if (ipAddress == null) {
ipAddress = request.getRemoteAddr();
}
reference : http://www.mkyong.com/java/how-to-get-client-ip-address-in-java/
参考：http: //www.mkyong.com/java/how-to-get-client-ip-address-in-java/
回答by bhargav
import java.net.UnknownHostException;
/**
* Simple Java program to find IP Address of localhost. This program uses
* InetAddress from java.net package to find IP address.
*
*/
public class IPTest {
public static void main(String args[]) throws UnknownHostException {
InetAddress addr = InetAddress.getLocalHost();
//Getting IPAddress of localhost - getHostAddress return IP Address
// in textual format
String ipAddress = addr.getHostAddress();
System.out.println("IP address of localhost from Java Program: " + ipAddress);
//Hostname
String hostname = addr.getHostName();
System.out.println("Name of hostname : " + hostname);
}
}
Output:
输出：
IP address of localhost from Java Program: 190.12.209.123
Name of hostname : PCLOND3433
回答by Partha Mondal
In case, you are trying to get the IP-address for Dev-environment then you can use this:-
如果您正在尝试获取开发环境的 IP 地址，那么您可以使用：-
public String processRegistrationForm(HttpServletRequest request)
{
String appUrl = request.getScheme() + "://"+ request.getLocalAddr();
return appUrl;
}
The request.getLocalAddr()will return the IP-address of the request receiving system.
该request.getLocalAddr()会返回请求接收系统的IP地址。
Hope it helps.
希望能帮助到你。
回答by elaheh aghaee
Try this one. for all condition
试试这个。对于所有条件
private static final String[] HEADERS_TO_TRY = {
"X-Forwarded-For",
"Proxy-Client-IP",
"WL-Proxy-Client-IP",
"HTTP_X_FORWARDED_FOR",
"HTTP_X_FORWARDED",
"HTTP_X_CLUSTER_CLIENT_IP",
"HTTP_CLIENT_IP",
"HTTP_FORWARDED_FOR",
"HTTP_FORWARDED",
"HTTP_VIA",
"REMOTE_ADDR" };
private String getClientIpAddress(HttpServletRequest request) {
for (String header : HEADERS_TO_TRY) {
String ip = request.getHeader(header);
if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
return ip;
}
}
return request.getRemoteAddr();
}
