dnsjava使用教程

以下是dnsjava的使用教程：

1.导入dnsjava库

import org.xbill.DNS.*;

2.创建一个DNS查询

String domain = "example.com";
Record[] records = new Lookup(domain, Type.A).run();

3.获取查询结果

for (Record record : records) {
    if (record instanceof ARecord) {
        ARecord aRecord = (ARecord) record;
        System.out.println(aRecord.getAddress());
    }
}

4.设置DNS服务器

Lookup lookup = new Lookup(domain, Type.A);
lookup.setResolver(new SimpleResolver("8.8.8.8"));
Record[] records = lookup.run();

5.使用DNSSEC验证

Lookup lookup = new Lookup(domain, Type.A);
lookup.setResolver(new SimpleResolver("8.8.8.8"));
lookup.setDNSSEC(ValidationOptions.Secure);
Record[] records = lookup.run();