JAVA实现对阿里云DNS的解析管理

1、阿里云DNS的SDK依赖

	`<dependency>`
	`<groupId>com.aliyun</groupId>`
	`<artifactId>tea-openapi</artifactId>`
	`<version>0.0.19</version>`
	`</dependency>`
	`<dependency>`
	`<groupId>com.aliyun</groupId>`
	`<artifactId>alidns20150109</artifactId>`
	`<version>2.0.1</version>`
	`</dependency>`

2、第一个方法：创建SDK客户端实例

所有解析记录的操作都要通过这个客户端实例来进行，所以要首先创建这个实例，需要阿里云的AccessKey（AppId和AppSecret）

	`/**`
	`* <p>`
	`* 创建客户端实例`
	`* </p>`
	`*`
	`* @return`
	`* @throws Exception`
	`*/`
	`private Client createClient() throws Exception{`
	`AliConfig api = APIKit.getAliConfig(); //返回阿里云的AccessKey参数`
	`if(api == null) throw new ErrException("未配置阿里云API参数！");`
	`Config config = new Config();`
	`config.accessKeyId = api.getAppId();`
	`config.accessKeySecret = api.getAppSecret();`
	`config.endpoint = "alidns.cn-beijing.aliyuncs.com";`
	`return new Client(config);`
	`}`

3、第二个方法：返回指定的记录ID（RecordId）

在阿里云的SDK中，对解析记录进行修改和删除时，都需要传入 RecordId 这个参数，所以提前写一个获取记录ID的方法。

	`/**`
	`* <p>`
	`* 返回指定主机记录的ID，不存在时返回null`
	`* </p>`
	`*`
	`* @param DomainName`
	`* @param RR 记录名称`
	`* @return`
	`*/`
	`private String getRecId(Client client, String DomainName, String RR){`
	`String recId = null;`
	`try {`
	`DescribeDomainRecordsRequest request = new DescribeDomainRecordsRequest();`
	`request.setDomainName(DomainName);`
	`request.setRRKeyWord(RR);`
	`DescribeDomainRecordsResponse response = client.describeDomainRecords(request);`
	`if(response.getBody().getTotalCount() > 0){`
	`List<DescribeDomainRecordsResponseBodyDomainRecordsRecord> recs = response.getBody().getDomainRecords().getRecord();`
	`for(DescribeDomainRecordsResponseBodyDomainRecordsRecord rec: recs){`
	`if(rec.getRR().equalsIgnoreCase(RR)){`
	`recId = rec.getRecordId();`
	`break;`
	`}`
	`}`
	`}`
	`} catch (Exception e) {`
	`}`
	`return recId;`
	`}`

4、第三个方法：添加或修改指定的记录

方便起见，这里我将添加和修改集成到了一个方法，相当于SaveOrUpdate。

	`/**`
	`* <p>`
	`* 添加或修改解析记录`
	`* </p>`
	`*`
	`* @param DomainName 域名`
	`* @param RR 记录名称`
	`* @param Type 记录类型（A、AAAA、MX、TXT、CNAME）`
	`* @param Value 记录值`
	`*/`
	`public void update(String DomainName, String RR, String Type, String Value){`
	`try {`
	`if(EStr.isEmpty(DomainName)) throw new RuntimeException("域名（DomainName）为空！");`
	`if(EStr.isEmpty(RR)) throw new RuntimeException("主机记录（RR）为空！");`
	`if(EStr.isEmpty(Type)) throw new RuntimeException("记录类型（Type）为空！");`
	`if(EStr.isEmpty(Value)) throw new RuntimeException("记录值（Value）为空！");`
	`Client client = createClient();`
	`String recId = getRecId(client, DomainName, RR);`
	`if(EStr.isNull(recId)){ //添加`
	`AddDomainRecordRequest request = new AddDomainRecordRequest();`
	`request.setDomainName(DomainName);`
	`request.setRR(RR);`
	`request.setType(Type);`
	`request.setValue(Value);`
	`AddDomainRecordResponse response = client.addDomainRecord(request);`
	`recId = response.getBody().getRecordId();`
	`}else{ //修改`
	`UpdateDomainRecordRequest request = new UpdateDomainRecordRequest();`
	`request.setRecordId(recId);`
	`request.setRR(RR);`
	`request.setType(Type);`
	`request.setValue(Value);`
	`UpdateDomainRecordResponse response = client.updateDomainRecord(request);`
	`recId = response.getBody().getRecordId();`
	`}`
	`renderJson(Result.success("recId", recId));`
	`} catch (Exception e) {`
	`renderJson(Result.fail(e.getMessage()));`
	`}`
	`}`

5、第四个方法：删除指定的记录

这个很简单，根据查找到的RecordId直接删除即可。

	`/**`
	`* <p>`
	`* 删除记录`
	`* </p>`
	`*`
	`* @param DomainName`
	`* @param RR`
	`*/`
	`public void remove(String DomainName, String RR){`
	`try {`
	`if(EStr.isEmpty(DomainName)) throw new RuntimeException("域名（DomainName）为空！");`
	`if(EStr.isEmpty(RR)) throw new RuntimeException("主机记录（RR）为空！");`
	`Client client = createClient();`
	`String recId = getRecId(client, DomainName, RR);`
	`if(EStr.isNull(recId)){`
	`renderJson(Result.success("recId", null));`
	`}else{`
	`DeleteDomainRecordRequest request = new DeleteDomainRecordRequest();`
	`request.setRecordId(recId);`
	`DeleteDomainRecordResponse response = client.deleteDomainRecord(request);`
	`renderJson(Result.success("recId", response.getBody().getRecordId()));`
	`}`
	`} catch (Exception e) {`
	`renderJson(Result.fail(e.getMessage()));`
	`}`
	`}`