阿里云DDNS动态绑定域名与IP实现远程调试远程办公

之前申请了公网IP，这样调试接口的时候可以直接远程调试，但因为申请的公网IP会随时变化，所以使用阿里云DDNS服务，随时绑定公网IP，直接域名访问服务。

1.创建阿里云账号和访问密钥（AccessKey）

AccessKey是您访问阿里云API的密钥，使用阿里SDK进行操作必须先获取AccessKey！

创建地址：https://usercenter.console.aliyun.com/

因为主账号权限过于强大，所以尽量使用子账号AccessKey并赋予需要使用的权限，这里我们点击“开始使用子账号AccessKey”。

这里我们进行简单操作，直接点击创建用户即可

名称随意，控制台权限随意，但要注意选择OpenAPI访问！

创建成功后，需要添加AccessKey，点击创建。

注意：创建成功后一定要记住AccessKey等相关信息，如果忘记，只能创建新的key代替！

之后点击权限管理，添加权限！

找到“管理云解析(DNS)的权限”添加即可。

2.使用SDK绑定动态IP绑定

创建Maven项目并加入阿里云SDK依赖

<dependencies><!-- https://mvnrepository.com/artifact/com.aliyun/aliyun-java-sdk-core --><dependency><groupId>com.aliyun</groupId><artifactId>aliyun-java-sdk-core</artifactId><version>4.4.3</version></dependency><!-- https://mvnrepository.com/artifact/com.aliyun/aliyun-java-sdk-alidns --><dependency><groupId>com.aliyun</groupId><artifactId>aliyun-java-sdk-alidns</artifactId><version>2.0.10</version></dependency>
</dependencies>

示例代码：

import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.alidns.model.v20150109.DescribeDomainRecordsRequest;
import com.aliyuncs.alidns.model.v20150109.DescribeDomainRecordsResponse;
import com.aliyuncs.alidns.model.v20150109.UpdateDomainRecordRequest;
import com.aliyuncs.alidns.model.v20150109.UpdateDomainRecordResponse;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.profile.DefaultProfile;
import com.google.gson.Gson;import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** 动态域名解析*/
public class DDNS {/*** 获取主域名的所有解析记录列表*/private DescribeDomainRecordsResponse describeDomainRecords(DescribeDomainRecordsRequest request, IAcsClient client){try {// 调用SDK发送请求return client.getAcsResponse(request);} catch (ClientException e) {e.printStackTrace();// 发生调用错误，抛出运行时异常throw new RuntimeException();}}/*** 获取当前主机公网IP*/private String getCurrentHostIP(){// 这里使用jsonip.com第三方接口获取本地IPString jsonip = "https://jsonip.com/";// 接口返回结果String result = "";BufferedReader in = null;try {// 使用HttpURLConnection网络请求第三方接口URL url = new URL(jsonip);HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();urlConnection.setRequestMethod("GET");urlConnection.connect();in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));String line;while ((line = in.readLine()) != null) {result += line;}} catch (Exception e) {e.printStackTrace();}// 使用finally块来关闭输入流finally {try {if (in != null) {in.close();}} catch (Exception e2) {e2.printStackTrace();}}// 正则表达式，提取xxx.xxx.xxx.xxx，将IP地址从接口返回结果中提取出来String rexp = "(\\d{1,3}\\.){3}\\d{1,3}";Pattern pat = Pattern.compile(rexp);Matcher mat = pat.matcher(result);String res="";while (mat.find()) {res=mat.group();break;}return res;}/*** 修改解析记录*/private UpdateDomainRecordResponse updateDomainRecord(UpdateDomainRecordRequest request, IAcsClient client){try {// 调用SDK发送请求return client.getAcsResponse(request);} catch (ClientException e) {e.printStackTrace();// 发生调用错误，抛出运行时异常throw new RuntimeException();}}private static void log_print(String functionName, Object result) {Gson gson = new Gson();System.out.println("-------------------------------" + functionName + "-------------------------------");System.out.println(gson.toJson(result));}public static void main(String[] args) {// 设置鉴权参数，初始化客户端DefaultProfile profile = DefaultProfile.getProfile("cn-qingdao",// 地域ID"your-access-key-id",// 您的AccessKey ID"your-access-key-secret");// 您的AccessKey SecretIAcsClient client = new DefaultAcsClient(profile);DDNS ddns = new DDNS();// 查询指定二级域名的最新解析记录DescribeDomainRecordsRequest describeDomainRecordsRequest = new DescribeDomainRecordsRequest();// 主域名describeDomainRecordsRequest.setDomainName("example.com");// 主机记录describeDomainRecordsRequest.setRRKeyWord("ddnstest");// 解析记录类型describeDomainRecordsRequest.setType("A");DescribeDomainRecordsResponse describeDomainRecordsResponse = ddns.describeDomainRecords(describeDomainRecordsRequest, client);log_print("describeDomainRecords",describeDomainRecordsResponse);List<DescribeDomainRecordsResponse.Record> domainRecords = describeDomainRecordsResponse.getDomainRecords();// 最新的一条解析记录if(domainRecords.size() != 0 ){DescribeDomainRecordsResponse.Record record = domainRecords.get(0);// 记录IDString recordId = record.getRecordId();// 记录值String recordsValue = record.getValue();// 当前主机公网IPString currentHostIP = ddns.getCurrentHostIP();System.out.println("-------------------------------当前主机公网IP为："+currentHostIP+"-------------------------------");if(!currentHostIP.equals(recordsValue)){// 修改解析记录UpdateDomainRecordRequest updateDomainRecordRequest = new UpdateDomainRecordRequest();// 主机记录updateDomainRecordRequest.setRR("ddnstest");// 记录IDupdateDomainRecordRequest.setRecordId(recordId);// 将主机记录值改为当前主机IPupdateDomainRecordRequest.setValue(currentHostIP);// 解析记录类型updateDomainRecordRequest.setType("A");UpdateDomainRecordResponse updateDomainRecordResponse = ddns.updateDomainRecord(updateDomainRecordRequest, client);log_print("updateDomainRecord",updateDomainRecordResponse);}}}
}

此处注意，有四个地方需要改动：
your-access-key-id,your-access-key-secret，这两处对应了之前申请的AccessKey，填写即可。
example.com:这里需要修改为申请的域名，直接修改即可。
ddnstest:主机记录，按照域名解析设置中填写即可

直接执行即可，免去手动修改域名。

如果有服务器不停机的需求，还可以直接使用定时任务循环之形态吗，检测到域名更改则重新绑定：

import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.alidns.model.v20150109.DescribeDomainRecordsRequest;
import com.aliyuncs.alidns.model.v20150109.DescribeDomainRecordsResponse;
import com.aliyuncs.alidns.model.v20150109.UpdateDomainRecordRequest;
import com.aliyuncs.alidns.model.v20150109.UpdateDomainRecordResponse;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.profile.DefaultProfile;
import com.google.gson.Gson;import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** 动态域名解析*/
public class DDNS {/*** 获取主域名的所有解析记录列表*/private DescribeDomainRecordsResponse describeDomainRecords(DescribeDomainRecordsRequest request, IAcsClient client){try {// 调用SDK发送请求return client.getAcsResponse(request);} catch (ClientException e) {e.printStackTrace();// 发生调用错误，抛出运行时异常throw new RuntimeException();}}/*** 获取当前主机公网IP*/private String getCurrentHostIP(){// 这里使用jsonip.com第三方接口获取本地IPString jsonip = "https://jsonip.com/";// 接口返回结果String result = "";BufferedReader in = null;try {// 使用HttpURLConnection网络请求第三方接口URL url = new URL(jsonip);HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();urlConnection.setRequestMethod("GET");urlConnection.connect();in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));String line;while ((line = in.readLine()) != null) {result += line;}} catch (Exception e) {e.printStackTrace();}// 使用finally块来关闭输入流finally {try {if (in != null) {in.close();}} catch (Exception e2) {e2.printStackTrace();}}// 正则表达式，提取xxx.xxx.xxx.xxx，将IP地址从接口返回结果中提取出来String rexp = "(\\d{1,3}\\.){3}\\d{1,3}";Pattern pat = Pattern.compile(rexp);Matcher mat = pat.matcher(result);String res="";while (mat.find()) {res=mat.group();break;}return res;}/*** 修改解析记录*/private UpdateDomainRecordResponse updateDomainRecord(UpdateDomainRecordRequest request, IAcsClient client){try {// 调用SDK发送请求return client.getAcsResponse(request);} catch (ClientException e) {e.printStackTrace();// 发生调用错误，抛出运行时异常throw new RuntimeException();}}public static void checkIP(){System.err.println("————————————————————————————————————————————————————————————————————————————————————————————————————");System.err.println("任务开始，当前时间为："+ LocalDateTime.now());// 设置鉴权参数，初始化客户端DefaultProfile profile = DefaultProfile.getProfile("cn-qingdao",// 地域ID"",// 您的AccessKey ID"");// 您的AccessKey SecretIAcsClient client = new DefaultAcsClient(profile);DDNS ddns = new DDNS();// 查询指定二级域名的最新解析记录DescribeDomainRecordsRequest describeDomainRecordsRequest = new DescribeDomainRecordsRequest();// 主域名describeDomainRecordsRequest.setDomainName("");// 主机记录describeDomainRecordsRequest.setRRKeyWord("@");// 解析记录类型describeDomainRecordsRequest.setType("A");DescribeDomainRecordsResponse describeDomainRecordsResponse = ddns.describeDomainRecords(describeDomainRecordsRequest, client);List<DescribeDomainRecordsResponse.Record> domainRecords = describeDomainRecordsResponse.getDomainRecords();// 最新的一条解析记录if(domainRecords.size() != 0 ){DescribeDomainRecordsResponse.Record record = domainRecords.get(0);// 记录IDString recordId = record.getRecordId();// 记录值String recordsValue = record.getValue();// 当前主机公网IPString currentHostIP = ddns.getCurrentHostIP();System.err.println("云解析IP为："+recordsValue);System.err.println("当前主机公网IP为："+currentHostIP);if(!currentHostIP.equals(recordsValue)){// 修改解析记录UpdateDomainRecordRequest updateDomainRecordRequest = new UpdateDomainRecordRequest();// 主机记录updateDomainRecordRequest.setRR("@");// 记录IDupdateDomainRecordRequest.setRecordId(recordId);// 将主机记录值改为当前主机IPupdateDomainRecordRequest.setValue(currentHostIP);// 解析记录类型updateDomainRecordRequest.setType("A");UpdateDomainRecordResponse updateDomainRecordResponse = ddns.updateDomainRecord(updateDomainRecordRequest, client);System.err.println("云解析IP更新成功");}else{System.err.println("IP相同无需更新");}}}public static void main(String[] args) {// 创建一个ScheduledThreadPoolExecutor线程池，核心线程数为5ScheduledExecutorService scheduledExecutorService = new ScheduledThreadPoolExecutor(1);// 创建Runnable打印当前线程和当前时间Runnable r = () -> checkIP();// 在指定1秒延迟后执行r,之后每30秒执行一次scheduledExecutorService.scheduleAtFixedRate(r, 1, 30, TimeUnit.SECONDS);}
}

后台执行即可！