版权声明:转载请标明出处 https://blog.csdn.net/Joe_Wang1/article/details/82379273
package com.example.springboot.shiro.common.utils.ip;
/**
* Created by joe强 on 2018/8/29 17:00
*/
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import org.jsoup.Connection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Element;
/**
* Created by joe强 on 2018/8/29 15:07
*/
public class IpUtil {
public static String getWebIp() {
try {
//如果请求超时 ,请查看查询本机IP网站 是否更换
URL url = new URL("http://2018.ip138.com/ic.asp");
BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));
String s = "";
StringBuffer sb = new StringBuffer("");
String webContent = "";
while ((s = br.readLine()) != null) {
sb.append(s + "\r\n");
}
br.close();
webContent = sb.toString();
int start = webContent.indexOf("[")+1;
int end = webContent.indexOf("]");
webContent = webContent.substring(start,end);
return webContent;
} catch (Exception e) {
System.err.println("获取IP发生错误");
e.printStackTrace();
return "error";
}
}
public static void main(String [] args) throws IOException {
String ip = IpUtil.getWebIp();
System.out.println(ip);
String str ="***";
StringBuilder sb = new StringBuilder(ip);
sb.replace(12,15,str);
System.out.println(sb.toString());
}
}