Java服务端获取IP及归属地查询

获取请求的IP

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public String getIp(HttpServletRequest request){
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();
}
if(ip == null){
return "";
}
String[] ipArr = ip.split(",");
if(ipArr.length>0){
return ipArr[0];
}else{
return "";
}
}

如果通过了多级反向代理的话,X-Forwarded-For的值并不止一个,而是一串IP值,究竟哪个才是真正的用户端的真实IP呢?

答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。

如:

X-Forwarded-For:192.168.1.110,192.168.1.120, 192.168.1.130,192.168.1.100

用户真实IP为:192.168.1.110

获取IP的归属地

添加依赖

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<dependencies>
<dependency>
<groupId>org.lionsoul</groupId>
<artifactId>ip2region</artifactId>
<version>2.6.6</version>
</dependency>
</dependencies>

示例代码

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import org.lionsoul.ip2region.xdb.Searcher;
import java.io.*;
import java.util.concurrent.TimeUnit;

public class SearcherTest {
public static void main(String[] args) {
// 1、创建 searcher 对象
String dbPath = "D:\\Project\\java\\data\\ip2region.xdb";
Searcher searcher = null;
try {
searcher = Searcher.newWithFileOnly(dbPath);
} catch (IOException e) {
System.out.printf("failed to create searcher with `%s`: %s\n", dbPath, e);
return;
}

// 2、查询
String ip = "223.5.5.5";
try {
long sTime = System.nanoTime();
String region = searcher.search(ip);
long cost = TimeUnit.NANOSECONDS.toMicros((long) (System.nanoTime() - sTime));
System.out.printf("{region: %s, ioCount: %d, took: %d μs}\n", region, searcher.getIOCount(), cost);
} catch (Exception e) {
System.out.printf("failed to search(%s): %s\n", ip, e);
}

// 3、关闭资源
try {
searcher.close();
} catch (IOException e) {
e.printStackTrace();
}

// 备注:并发使用,每个线程需要创建一个独立的 searcher 对象单独使用。
}
}

其中ip2region.xdb下载地址

链接:https://pan.baidu.com/s/1Uc_2kB0lFpH9rlCOQOvh0w
提取码:psvm