阿里云解析动态公网IP

在阿里云上买的域名： *******.love

现在都是动态IP，每次IP变了就得从新在阿里云后台改。

用阿里云解析提供的接口，可以自动修改解析的IP。

思路是每次开机轮询IP是否变化，如果变化了，就按接口文档提供的格式，发一个post请求实现修改。这个修改会有几分钟的间隔才会生效。

这样在家开启这个程序，或者导出exe放启动文件里，开机启动。便可以实时更新域名对应的ip地址。

关键代码：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.URL;
import java.net.URLConnection;
import java.util.Date;
import java.util.List;

import com.aliyun.api.AliyunClient;
import com.aliyun.api.AliyunConstants;
import com.aliyun.api.DefaultAliyunClient;
import com.aliyun.api.dns.dns20150109.request.DescribeSubDomainRecordsRequest;
import com.aliyun.api.dns.dns20150109.request.UpdateDomainRecordRequest;
import com.aliyun.api.dns.dns20150109.response.DescribeSubDomainRecordsResponse;
import com.aliyun.api.dns.dns20150109.response.UpdateDomainRecordResponse;
import com.aliyun.api.domain.Record;

public class DemoListDomains {
	private static AliyunClient client;

	static {
		String serverUrl = "http://dns.aliyuncs.com/";
		String accessKeyId = "yourId";
		String accessKeySecret = "yourSecret";

		client = new DefaultAliyunClient(serverUrl, accessKeyId, accessKeySecret, AliyunConstants.FORMAT_JSON);
	}

	public static void main(String[] args) {
		
		while(true){
			
			try {
				// 获取域名信息
				DescribeSubDomainRecordsRequest ddi_req = new DescribeSubDomainRecordsRequest();
				ddi_req.setTimestamp(new Date().getTime());
				DescribeSubDomainRecordsResponse ddi_resp = new DescribeSubDomainRecordsResponse();
				ddi_req.setSubDomain("your域名");
				ddi_resp = client.execute(ddi_req);

				List<Record> list = ddi_resp.getDomainRecords();
				boolean changed = false;
				for (Record record : list) {
					String ip = getMyIPOutter();// 获得本机公网IP

					System.out.println("old_ip : " + record.getValue());
					System.out.println("outter_ip : " + ip);
					if (!ip.equals(record.getValue())) {
						// 根据传入参数修改解析记录
						UpdateDomainRecordRequest udr_req = new UpdateDomainRecordRequest();
						udr_req.setTimestamp(new Date().getTime());
						udr_req.setRecordId(record.getRecordId());
						udr_req.setrR(record.getrR());
						udr_req.setValue(ip);
						udr_req.setType(record.getType());
						udr_req.settTL(record.gettTL());
						udr_req.setPriority(record.getPriority());
						udr_req.setLine(record.getLine());
						
						UpdateDomainRecordResponse udr_resp = new UpdateDomainRecordResponse();
						udr_resp = client.execute(udr_req);
						if (udr_resp.getErrorCode() == null) {
							System.out.println("success");
							changed = true;
						} else {
							System.out.println("error");
						}
					}
					
				}
				if (!changed) {
					System.out.println("need not change");
				}
			} catch (Exception e) {
				e.printStackTrace();
				System.out.println("error");
			}
			try {
				Thread.sleep(5000);
				
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}

	}

	private static String getMyIPOutter() throws IOException {
		InputStream ins = null;
		try {
			URL url = new URL("http://1212.ip138.com/ic.asp");
			URLConnection con = url.openConnection();
			ins = con.getInputStream();
			InputStreamReader isReader = new InputStreamReader(ins, "GB2312");
			BufferedReader bReader = new BufferedReader(isReader);
			StringBuffer webContent = new StringBuffer();
			String str = null;
			while ((str = bReader.readLine()) != null) {
				if (str.contains("您的IP是：[")) {
					webContent.append(str);
					break;
				}
			}
			int start = webContent.indexOf("[") + 1;
			int end = webContent.indexOf("]");
			return webContent.substring(start, end);
		} finally {
			if (ins != null) {
				ins.close();
			}
		}
	}

	@SuppressWarnings("unused")
	private static String getMyIPLocal() throws IOException {
		InetAddress ia = InetAddress.getLocalHost();
		return ia.getHostAddress();
	}
}

效果：