package dns;

import org.xbill.DNS.Lookup;
import org.xbill.DNS.Record;

public class DomainNameResolve {
    public Record[] domainNameResolve(String domainName, int mxType) {
        Record records[] = null;
        try {
            /* MX = 15;
             * A = 1;
             * PTR = 12;
             * TXT = 16;
             */
            Lookup lookup = new Lookup(domainName, mxType); //Type.MX是int类型 可换成数字
            lookup.run();
            /* lookup.SUCCESSFUL 返回0
             *  lookup.getResult() 如果查询到返回0， 没查询到返回3
             */
            if(lookup.getResult() == Lookup.SUCCESSFUL) {
                records = lookup.getAnswers();  // 结果是一个数组
            }else {
                System.out.println(domainName + " 未查到结果！");
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return records;
    }
}