ddns+java+阿里云动态修改DDNS+外网IP

package com.liness.util; import org.springframework.util.StringUtils; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * 获取IP工具类 */ public class IpToolUtils { // 方法1 private static String getNowIP1() throws IOException { String ip = null; String chinaz = "http://ip.chinaz.com"; StringBuilder inputLine = new StringBuilder(); String read = ""; URL url = null; HttpURLConnection urlConnection = null; BufferedReader in = null; try { url = new URL(chinaz); urlConnection = (HttpURLConnection) url.openConnection(); in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream(), "UTF-8")); while ((read = in.readLine()) != null) { inputLine.append(read + "\r\n"); } Pattern p = Pattern.compile("\\<dd class\\=\"fz24\">(.*?)\\<\\/dd>"); Matcher m = p.matcher(inputLine.toString()); if (m.find()) { String ipstr = m.group(1); ip = ipstr; } } finally { if (in != null) { in.close(); } } if (StringUtils.isEmpty(ip)) { throw new RuntimeException(); } return ip; } // 方法2 private static String getNowIP2() throws IOException { String ip = null; BufferedReader br = null; try { URL url = new URL("https://v6r.ipip.net/?format=callback"); 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"); } webContent = sb.toString(); int start = webContent.indexOf("(") + 2; int end = webContent.indexOf(")") - 1; webContent = webContent.substring(start, end); ip = webContent; } finally { if (br != null) br.close(); } if (StringUtils.isEmpty(ip)) { throw new RuntimeException(); } return ip; } // 方法3 private static String getNowIP3() throws IOException { String ip = null; String objWebURL = "https://ip.900cha.com/"; BufferedReader br = null; try { URL url = new URL(objWebURL); br = new BufferedReader(new InputStreamReader(url.openStream())); String s = ""; String webContent = ""; while ((s = br.readLine()) != null) { if (s.indexOf("我的IP:") != -1) { ip = s.substring(s.indexOf(":") + 1); break; } } } finally { if (br != null) br.close(); } if (StringUtils.isEmpty(ip)) { throw new RuntimeException(); } return ip; } // 方法4 private static String getNowIP4() throws IOException { String ip = null; String objWebURL = "https://bajiu.cn/ip/"; BufferedReader br = null; try { URL url = new URL(objWebURL); br = new BufferedReader(new InputStreamReader(url.openStream())); String s = ""; String webContent = ""; while ((s = br.readLine()) != null) { if (s.indexOf("互联网IP") != -1) { ip = s.substring(s.indexOf("'") + 1, s.lastIndexOf("'")); break; } } } finally { if (br != null) br.close(); } if (StringUtils.isEmpty(ip)) { throw new RuntimeException(); } return ip; } public static String getPublicIP() { String ip = null; // 第一种方式 try { ip = getNowIP1(); ip.trim(); } catch (Exception e) { System.out.println("getPublicIP - getNowIP1 failed ~ "); } if (!StringUtils.isEmpty(ip)) return ip; // 第二种方式 try { ip = getNowIP2(); ip.trim(); } catch (Exception e) { System.out.println("getPublicIP - getNowIP2 failed ~ "); } if (!StringUtils.isEmpty(ip)) return ip; // 第三种方式 try { ip = getNowIP3(); ip.trim(); } catch (Exception e) { System.out.println("getPublicIP - getNowIP3 failed ~ "); } if (!StringUtils.isEmpty(ip)) return ip; // 第四种方式 try { ip = getNowIP4(); ip.trim(); } catch (Exception e) { System.out.println("getPublicIP - getNowIP4 failed ~ "); } if (!StringUtils.isEmpty(ip)) return ip; return ip; } }