java之解析DNS的SRV记录

1、导入相应的jar包

       导入sjava-2.1.6.jar包，今天上传资源有问题，下次传了之后再补充到这里。

2、关键代码

      public static List<String> resoveSrv(String query) {
 //   	   String s = "ramuh.example.com";  // the inputted string, I need to obtain the Port to be added to this
  	    ArrayList<String> ret = new ArrayList<String>();
 //  	    String query = "_rdp._tcp." + s;
  	    try{
  	        Record[] records = new Lookup(query,Type.SRV).run();  // returning null
  	        if(records != null && records.length > 0) {
  	            for(Record r : records) {
  	                SRVRecord srv = (SRVRecord)r;
  	                String hostname = srv.getTarget().toString().replaceFirst("\\.$", "");
  	                int port = srv.getPort();
  	                ret.add(hostname + ":" + port);
  	            }
  	            return ret;
  	        }
  	        else{
  	           return null;
  	        }
  	    } catch (TextParseException e) {
  	        return null;
  	    }
      }

2、4行是注释掉的