dnsjava中代码实现dig命令

以下是使用dnsjava实现dig命令的示例代码： ```java import org.xbill.DNS.*; public class DigCommand { public static void main(String[] args) throws TextParseException { String domain = args[0]; String server = args.length > 1 ? args[1] : null; int type = args.length > 2 ? Type.value(args[2]) : Type.A; SimpleResolver resolver = new SimpleResolver(server); resolver.setTCP(true); Message query = new Message(); Header header = query.getHeader(); header.setOpcode(Opcode.QUERY); header.setID(0); header.setFlag(Flags.RD); header.setFlag(Flags.AD); Name name = Name.fromString(domain, Name.root); Record question = Record.newRecord(name, type, DClass.IN); query.addRecord(question, Section.QUESTION); try { Message response =