最近我们发现各大社交平台都出现了一个新的功能:IP属地。
比如某乎:
这个IP属地是怎么做到的呢?今天我来教教你,保证你看完直呼Easy~
技术栈
1.Java网络编程
2.Servlet
具体实现
1.获取IP地址及其归属地工具类
package com.mmg.controller;
import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* 获取IP地址工具类
*/
public class Iputil {
/**
* 1.通过request对象获取IP
* 使用Nginx等反向代理软件, 则不能通过request.getRemoteAddr()获取IP地址
* 果使用了多级反向代理的话,X-Forwarded-For的值并不止一个,而是一串IP地址,X-Forwarded-For中第一个非unknown的有效IP字符串,则为真实IP地址
*/
public static String getIpAddr(HttpServletRequest request) {
String ip = null;
try {
ip = request.getHeader("x-forwarded-for");
if (ip == null || "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 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (ip == null || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
} catch (Exception e) {
e.printStackTrace();
}
//使用代理,则获取第一个IP地址
if (ip == null) {
if (ip.indexOf(",") > 0) {
ip = ip.substring(0, ip.indexOf(","));
}
}
return ip;
}
/**
* 2.通过调用接口的方式获取IP
*/
public static String getIp() {
try {
URL realUrl = new URL("http://whois.pconline.com.cn/ipJson.jsp");
HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
conn.setRequestMethod("GET");
conn.setUseCaches(false);
conn.setReadTimeout(6000);
conn.setConnectTimeout(6000);
conn.setInstanceFollowRedirects(false);
int code = conn.getResponseCode();
StringBuilder sb = new StringBuilder();
String ip = "";
if (code == 200) {
InputStream in = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
//控制台输出乱码,就指定编码为GBK即可。
//BufferedReader reader = new BufferedReader(new InputStreamReader(in, "GBK"));
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
ip = sb.substring(sb.indexOf("ip") + 5, sb.indexOf("pro") - 3);
}
return ip;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 3.通过调用接口根据ip获取归属地
*/
public static String getAddress(String ip) {
try {
URL realUrl = new URL("http://whois.pconline.com.cn/ipJson.jsp?ip=" + ip + "&json=true");
HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
conn.setRequestMethod("GET");
conn.setUseCaches(false);
conn.setReadTimeout(6000);
conn.setConnectTimeout(6000);
conn.setInstanceFollowRedirects(false);
int code = conn.getResponseCode();
StringBuilder sb = new StringBuilder();
String ipaddr = "";
if (code == 200) {
InputStream in = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
ipaddr = ip + "=" + sb.substring(sb.indexOf("addr") + 7, sb.indexOf("regionNames") - 3);
}
return ipaddr;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
2.测试类
package com.mmg.controller;
/**
* 测试类
*/
public class Test {
public static void main(String[] args) {
System.out.println(Iputil.getIpAddr());
System.out.println(Iputil.getAddress(Iputil.getIp()));
}
}
通过运行这个方法,可以看到,控制台打印了IP和城市信息,也就是我们想要的IP属地信息
啦!
文章来源:https://www.toymoban.com/news/detail-502703.html
在你的项目里,你可以在登录的时候记录当前登录用户的IP和登录地点,也可以在用户发表文章和评论的时候显示出他的IP属地,非常实用哦~文章来源地址https://www.toymoban.com/news/detail-502703.html
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